Subject: Re: [Healeys] Spark plug gap

From: josef-eckert--- via Healeys <[email-masked]>
Date: Wed, 3 May 2023 21:55:39 +0200 (CEST)

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Spark plugs are designed and tested to be used with the gap given by the=20
producer of the spark plug.
When you widen the gap the plug gets hotter as it is designed for and the=
=20
electrode can melt or wear very fast.
Its a very short win you gain modifying them.
I never understand why people think they are better engineers and know=20
better than the designers of the system they use.
=20
Josef
=20
=20
=20
=20
-----Original-Nachricht-----
Betreff: [Healeys] Spark plug gap
Datum: 2023-05-03T21:39:57+0200
Von: "Simon Lachlan via Healeys" <[email-masked]>
An: "'Healeys'" <[email-masked]>
=20
=20
=20

I run my MkII BT7 on NGK BP6ES which were recommended by some of the wise=
=20
ones on this list.

The car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition distributor. =
DW fast road=20
cam=E2=80=A6etc

Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys told m=
e to set the=20
plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when I suggested th=
at I=E2=80=99d=20
heard of much greater gaps with my approximate setup.

So, I went with 0.028.

The other day, I decided to experiment and set my spare set at 0.032=E2=80=
=9D. Same=20
NGKs, no mileage on them..decent plugs. Anyhow, it made a very surprising=
=20
difference. All round performance is much enhanced.

Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our loc=
al=20
hills. But now it fairly zooms up them.

To be frank, all a bit of a surprise.

Not boasting=E2=80=A6just putting that out there in case anyone else is thi=
nking of=20
going up a few thou=E2=80=A6..

When I asked about gaps a few years back, some of the suggestions were near=
=20
0.040=E2=80=9D. Surely that a bit much?

Simon

=EF=BB=BF
------=_Part_4330901_4894390.1683143739936
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">Spark plugs are designed and tested to be used with the=
 gap given by the producer of the spark plug.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">When you widen the =
gap the plug gets hotter as it is designed for and the electrode can melt o=
r wear very fast.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Its a very short wi=
n you gain modifying them.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">I never understand =
why people think they are better engineers and know better than the designe=
rs of the system they use.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef </span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-03T21:39:57+0200</p>
<p style=3D"margin: 0px;">Von: "Simon Lachlan via Healeys" &lt;healeys@auto=
x.team.net&gt;</p>
<p style=3D"margin: 0px;">An: "'Healeys'" &lt;[email-masked]&gt;</p=
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal">I run my MkII BT7 on NGK BP6ES which were recommende=
d by some of the wise ones on this list.</p>
<p class=3D"MsoNormal">The car has a &ldquo;Sports&rdquo; coil and a 123Ign=
ition distributor. DW fast road cam&hellip;etc</p>
<p class=3D"MsoNormal">Now, talking of &ldquo;recommended&rdquo;, the rolli=
ng road guys told me to set the plugs at 0.028&rdquo; and pooh-poohed anyth=
ing bigger when I suggested that I&rsquo;d heard of much greater gaps with =
my approximate setup.</p>
<p class=3D"MsoNormal">So, I went with 0.028.</p>
<p class=3D"MsoNormal">The other day, I decided to experiment and set my sp=
are set at 0.032&rdquo;. Same NGKs, no mileage on them..decent plugs. Anyho=
w, it made a very surprising difference. All round performance is much enha=
nced.</p>
<p class=3D"MsoNormal">Despite it&rsquo;s 3:54 diff and 28% OD, it was neve=
r sluggish on our local hills. But now it fairly zooms up them.</p>
<p class=3D"MsoNormal">To be frank, all a bit of a surprise.</p>
<p class=3D"MsoNormal">Not boasting&hellip;just putting that out there in c=
ase anyone else is thinking of going up a few thou&hellip;..</p>
<p class=3D"MsoNormal">When I asked about gaps a few years back, some of th=
e suggestions were near 0.040&rdquo;. Surely that a bit much?</p>
<p class=3D"MsoNormal">Simon</p>
</div>
</div>=EF=BB=BF</body></html>
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_______________________________________________

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive/healeys

[email-masked]
http://autox.team.net/mailman/listinfo/healeys

--===============1994198935554034345==--

---

From: Alan Seigrist <[email-masked]>
Date: Thu, 4 May 2023 08:48:29 +0800

--===============1651652799312198371==

--0000000000009e0c0605fad388be
Content-Transfer-Encoding: quoted-printable

But if the modern plug is designed for a larger gap, why not use it?

On Thu, 4 May 2023 at 5:15 AM, josef-eckert--- via Healeys <
[email-masked]> wrote:

> Spark plugs are designed and tested to be used with the gap given by the
> When you widen the gap the plug gets hotter as it is designed for and the
> I never understand why people think they are better engineers and know
> I run my MkII BT7 on NGK BP6ES which were recommended by some of the wise
> ones on this list.
>
> The car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition distributor=
. DW fast road
> cam=E2=80=A6etc
>
> Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys told=
 me to set the
> plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when I suggested =
that I=E2=80=99d
> The other day, I decided to experiment and set my spare set at 0.032=E2=
=80=9D.
> Same NGKs, no mileage on them..decent plugs. Anyhow, it made a very
> surprising difference. All round performance is much enhanced.
>
> Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our l=
ocal
> Not boasting=E2=80=A6just putting that out there in case anyone else is t=
hinking
> of going up a few thou=E2=80=A6..
>
> When I asked about gaps a few years back, some of the suggestions were
> near 0.040=E2=80=9D. Surely that a bit much?
>
> Simon
> =EF=BB=BF
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation  $12.75
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/healeys/[email-masked]
>
>

--0000000000009e0c0605fad388be
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto">But if the modern plug is designed for a larger gap, why =
not use it?</div><div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=
=3D"gmail_attr">On Thu, 4 May 2023 at 5:15 AM, josef-eckert--- via Healeys =
&lt;<a href=3D"mailto:[email-masked]">[email-masked]</a>&gt=
; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .=
8ex;border-left:1px #ccc solid;padding-left:1ex"><div><p style=3D"margin:0p=
x"><span style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;col=
or:#000000;text-decoration:none">Spark plugs are designed and tested to be =
used with the gap given by the producer of the spark plug.<br></span></p>
<p style=3D"margin:0px"><span style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:10pt;color:#000000;text-decoration:none">When you widen the ga=
p the plug gets hotter as it is designed for and the electrode can melt or =
wear very fast.</span></p>
<p style=3D"margin:0px"><span style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:10pt;color:#000000;text-decoration:none">Its a very short win =
you gain modifying them.</span></p>
<p style=3D"margin:0px"><span style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:10pt;color:#000000;text-decoration:none">I never understand wh=
y people think they are better engineers and know better than the designers=
 of the system they use.</span></p>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px"><span style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:10pt;color:#000000;text-decoration:none">Josef </span></p>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px"><span style=3D"font-family:arial,helvetica,sans-ser=
if;font-size:10pt;color:#000000;text-decoration:none">=C2=A0</span></p>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px">-----Original-Nachricht-----</p>
<p style=3D"margin:0px">Betreff: [Healeys] Spark plug gap</p>
<p style=3D"margin:0px">Datum: 2023-05-03T21:39:57+0200</p>
<p style=3D"margin:0px">Von: &quot;Simon Lachlan via Healeys&quot; &lt;<a h=
ref=3D"mailto:[email-masked]" target=3D"_blank">[email-masked].=
net</a>&gt;</p>
<p style=3D"margin:0px">An: &quot;&#39;Healeys&#39;&quot; &lt;<a href=3D"ma=
ilto:[email-masked]" target=3D"_blank">[email-masked]</a>&g=
t;</p></div><div>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px">=C2=A0</p>
<p style=3D"margin:0px">=C2=A0</p>
<div style=3D"color:#000000;font:12px Arial,Helvetica,sans-serif">
<div>
<p class=3D"MsoNormal">I run my MkII BT7 on NGK BP6ES which were recommende=
d by some of the wise ones on this list.</p>
<p class=3D"MsoNormal">The car has a =E2=80=9CSports=E2=80=9D coil and a 12=
3Ignition distributor. DW fast road cam=E2=80=A6etc</p>
<p class=3D"MsoNormal">Now, talking of =E2=80=9Crecommended=E2=80=9D, the r=
olling road guys told me to set the plugs at 0.028=E2=80=9D and pooh-poohed=
 anything bigger when I suggested that I=E2=80=99d heard of much greater ga=
ps with my approximate setup.</p>
<p class=3D"MsoNormal">So, I went with 0.028.</p>
<p class=3D"MsoNormal">The other day, I decided to experiment and set my sp=
are set at 0.032=E2=80=9D. Same NGKs, no mileage on them..decent plugs. Any=
how, it made a very surprising difference. All round performance is much en=
hanced.</p>
<p class=3D"MsoNormal">Despite it=E2=80=99s 3:54 diff and 28% OD, it was ne=
ver sluggish on our local hills. But now it fairly zooms up them.</p>
<p class=3D"MsoNormal">To be frank, all a bit of a surprise.</p>
<p class=3D"MsoNormal">Not boasting=E2=80=A6just putting that out there in =
case anyone else is thinking of going up a few thou=E2=80=A6..</p>
<p class=3D"MsoNormal">When I asked about gaps a few years back, some of th=
e suggestions were near 0.040=E2=80=9D. Surely that a bit much?</p>
<p class=3D"MsoNormal">Simon</p>
</div>
</div>=EF=BB=BF</div>_______________________________________________<br>
rer" target=3D"_blank">http://www.team.net/donate.html</a><br>
<br>
Archive: <a href=3D"http://www.team.net/pipermail/healeys" rel=3D"noreferre=
r" target=3D"_blank">http://www.team.net/pipermail/healeys</a> <a href=3D"h=
ttp://autox.team.net/archive/healeys" rel=3D"noreferrer" target=3D"_blank">=
http://autox.team.net/archive/healeys</a><br>
<br>
<a href=3D"mailto:[email-masked]" target=3D"_blank">[email-masked]=
eam.net</a><br>
<a href=3D"http://autox.team.net/mailman/listinfo/healeys" rel=3D"noreferre=
r" target=3D"_blank">http://autox.team.net/mailman/listinfo/healeys</a><br>
<br>
s/[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.t=
eam.net/mailman/options/healeys/[email-masked]</a><br>
<br>
</blockquote></div></div>

--0000000000009e0c0605fad388be--

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[email-masked]

--===============1651652799312198371==--

---

From: josef-eckert--- via Healeys <[email-masked]>
Date: Thu, 4 May 2023 08:06:14 +0200 (CEST)

--===============6246231835205644402==
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For me, i prefer Champion plugs plugs to NGK, but that=C2=B4s a matter of t=
aste.=20
I think both, Champion and NGK, are of similar quality. Matter of taste, as=
=20
I wrote. But NOT the car manufacturer determines the plug gap, its the plug=
=20
manufacturer. Definitely the car manufacturer takes this for his specs in=
=20
the workshop manual.
There is to much hype about plugs anyway. I am working as a professional,=
=20
Elecrtonics and Elecrtrcian engineer, at a big classic car parts supplier=
=20
here in Europe and I never go away from the given plug gap as set by the=20
plug manufacturer. Austin-Healey engines  are not high tech, they are=20
tractor engines and can take a lot of misfit, but anyway BMC knew at the=20
time what=C2=B4s best to do with them, even its printed 60 or 70 years ago.
Some people try to adjust the fuel mixture with a CO-tester. You can do=20
that, but it doesn=C2=B4t give best results for road use, especially in hot=
ter=20
climates and high above sea level.
When you are very good in engine engineering and have all the tools you can=
=20
try to find some more horsepower in your engine, but you always pay that=20
with some more heat produced, which is not at all good for our old BMC=20
engines.
=20
Josef
=20
=20
=20
-----Original-Nachricht-----
Betreff: RE: [Healeys] Spark plug gap
Datum: 2023-05-04T00:06:58+0200
Von: "[email-masked]"=20
<[email-masked]>
An: "[email-masked]" <[email-masked]>
=20
=20
=20

You may be right. Not sure.

Actually I thought that the gap was determined by the car=E2=80=99s manufac=
turer ie=20
one could expect to find the same plug in two different cars and to find=20
that the recommended gap was not the same for each car.

Likewise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to 0.026=
=E2=80=9D and=20
that was some 60+ years ago. I=E2=80=99ve always been told that Champion pl=
ugs=20
aren=E2=80=99t the best in the world and I=E2=80=99m sure that a modern NGK=
 can stand a=20
little more heat than the Champions that were around 60 years ago.

Anyhow, I=E2=80=99ll keep an eye on them. I=E2=80=99m a pretty tame driver =
so there won=E2=80=99t=20
be undue stress under the bonnet.

Simon

=20

From: [email-masked] <[email-masked]>
Sent: 03 May 2023 20:56
To: [email-masked]; [email-masked]
Subject: AW: [Healeys] Spark plug gap

=20

-----Original-Nachricht-----
Betreff: [Healeys] Spark plug gap
Datum: 2023-05-03T21:39:57+0200
Von: "Simon Lachlan via Healeys" <[email-masked]
=20
=20
=20

So, I went with 0.028.

Simon

=20

=EF=BB=BF
------=_Part_4367077_900971263.1683180374322
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">For me, i prefer Champion plugs plugs to NGK, but that&=
acute;s a matter of taste. I think both, Champion and NGK, are of similar q=
uality. Matter of taste, as I wrote. But NOT the car manufacturer determine=
s the plug gap, its the plug manufacturer. Definitely the car manufacturer =
takes this for his specs in the workshop manual.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">There is to much hy=
pe about plugs anyway. I am working as a professional, Elecrtonics and Elec=
rtrcian engineer, at a big classic car parts supplier here in Europe and I =
never go away from the given plug gap as set by the plug manufacturer. Aust=
in-Healey engines&nbsp; are not high tech, they are tractor engines and can=
 take a lot of misfit, but anyway BMC knew at the time what&acute;s best to=
 do with them, even its printed 60 or 70 years ago.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Some people try to =
adjust the fuel mixture with a CO-tester. You can do that, but it doesn&acu=
te;t give best results for road use, especially in hotter climates and high=
 above sea level. </span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">When you are very g=
ood in engine engineering and have all the tools you can try to find some m=
ore horsepower in your engine, but you always pay that with some more heat =
produced, which is not at all good for our old BMC engines.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T00:06:58+0200</p>
<p style=3D"margin: 0px;">Von: "[email-masked]" &lt;simo=
[email-masked]&gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t=
-online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">You may=
 be right. Not sure. </span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Actuall=
y I thought that the gap was determined by the car&rsquo;s manufacturer ie =
one could expect to find the same plug in two different cars and to find th=
at the recommended gap was not the same for each car.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Likewis=
e, the BMC manual suggests Champion plugs at 0.024&rdquo; to 0.026&rdquo; a=
nd that was some 60+ years ago. I&rsquo;ve always been told that Champion p=
lugs aren&rsquo;t the best in the world and I&rsquo;m sure that a modern NG=
K can stand a little more heat than the Champions that were around 60 years=
 ago.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Anyhow,=
 I&rsquo;ll keep an eye on them. I&rsquo;m a pretty tame driver so there wo=
n&rsquo;t be undue stress under the bonnet.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Simon</=
span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">&nbsp;<=
/span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
 0cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong><span lang=3D"EN-US">From:</span></strong><s=
pan lang=3D"EN-US"> [email-masked] &lt;[email-masked]&g=
t; <br /><strong>Sent:</strong> 03 May 2023 20:56<br /><strong>To:</strong>=
 [email-masked]; [email-masked]<br /><strong>Sub=
ject:</strong> AW: [Healeys] Spark plug gap</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Spark plugs are designed and tested to be =
used with the gap given by the producer of the spark plug.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">When you widen the gap the plug gets hotte=
r as it is designed for and the electrode can melt or wear very fast.</span=
></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Its a very short win you gain modifying th=
em.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">I never understand why people think they a=
re better engineers and know better than the designers of the system they u=
se.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Josef </span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-03T21:39:57+0200</p>
<p style=3D"margin: 0px;">Von: "Simon Lachlan via Healeys" &lt;<a href=3D"m=
ailto:[email-masked]">[email-masked]</a>&gt;</p>
<p style=3D"margin: 0px;">An: "'Healeys'" &lt;<a href=3D"mailto:healeys@aut=
ox.team.net">[email-masked]</a>&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">I run my MkII BT7 on NGK BP6ES which were recommended by=
 some of the wise ones on this list.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The car has a &ldquo;Sports&rdquo; coil and a 123Ignitio=
n distributor. DW fast road cam&hellip;etc</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Now, talking of &ldquo;recommended&rdquo;, the rolling r=
oad guys told me to set the plugs at 0.028&rdquo; and pooh-poohed anything =
bigger when I suggested that I&rsquo;d heard of much greater gaps with my a=
pproximate setup.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">So, I went with 0.028.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The other day, I decided to experiment and set my spare =
set at 0.032&rdquo;. Same NGKs, no mileage on them..decent plugs. Anyhow, i=
t made a very surprising difference. All round performance is much enhanced=
.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Despite it&rsquo;s 3:54 diff and 28% OD, it was never sl=
uggish on our local hills. But now it fairly zooms up them.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">To be frank, all a bit of a surprise.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Not boasting&hellip;just putting that out there in case =
anyone else is thinking of going up a few thou&hellip;..</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">When I asked about gaps a few years back, some of the su=
ggestions were near 0.040&rdquo;. Surely that a bit much?</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Simon</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
</div>=EF=BB=BF</body></html>
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--===============6246231835205644402==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

[email-masked]

--===============6246231835205644402==--

---

From: josef-eckert--- via Healeys <[email-masked]>
Date: Thu, 4 May 2023 13:43:38 +0200 (CEST)

--===============2448807176728316412==
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Content-Transfer-Encoding: quoted-printable

Sorry, I am out here. This guy wants to play till the engine is shot.
=20
=20
=20
-----Original-Nachricht-----
Betreff: RE: [Healeys] Spark plug gap
Datum: 2023-05-04T12:45:37+0200
Von: "[email-masked]"=20

Thanks for that. I=E2=80=99ll certainly bear it in mind. Likewise, I=E2=80=
=99ll keep a=20
close eye on my engine=E2=80=99s temperature. The latter is quite well prot=
ected=20
with a modern rad, all the correct baffles, 5 blade fan plus electronic=20
fan. But, as I said, I=E2=80=99ll keep an eye on it.

Someone mentioned that he used =E2=80=9CIridium=E2=80=9D plugs from NGK. I =
googled=20
them=E2=80=A6.horribly expensive. Can they be worth it in our old cars?

Simon

=20

From: [email-masked] <[email-masked]>
Sent: 04 May 2023 07:06
To: [email-masked]; Healey, Forum=20
<[email-masked]>
Subject: AW: [Healeys] Spark plug gap

=20

-----Original-Nachricht-----
Betreff: RE: [Healeys] Spark plug gap
Datum: 2023-05-04T00:06:58+0200
Von: "[email-masked]
[email-masked]
=20
=20
=20

Simon

=20

Sent: 03 May 2023 20:56
To: [email-masked]
Subject: AW: [Healeys] Spark plug gap

=20

-----Original-Nachricht-----
Betreff: [Healeys] Spark plug gap
Datum: 2023-05-03T21:39:57+0200
Von: "Simon Lachlan via Healeys" <[email-masked]
=20
=20
=20

So, I went with 0.028.

Simon

=20

=20

=EF=BB=BF
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Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">Sorry, I am out here. This guy wants to play till the e=
ngine is shot.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T12:45:37+0200</p>
<p style=3D"margin: 0px;">Von: "[email-masked]" &lt;simo=
[email-masked]&gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t=
-online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Thanks =
for that. I&rsquo;ll certainly bear it in mind. Likewise, I&rsquo;ll keep a=
 close eye on my engine&rsquo;s temperature. The latter is quite well prote=
cted with a modern rad, all the correct baffles, 5 blade fan plus electroni=
c fan. But, as I said, I&rsquo;ll keep an eye on it.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Someone=
 mentioned that he used &ldquo;Iridium&rdquo; plugs from NGK. I googled the=
m&hellip;.horribly expensive. Can they be worth it in our old cars?</span><=
/p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Simon</=
span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">&nbsp;<=
/span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
 0cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong><span lang=3D"EN-US">From:</span></strong><s=
pan lang=3D"EN-US"> [email-masked] &lt;[email-masked]&g=
t; <br /><strong>Sent:</strong> 04 May 2023 07:06<br /><strong>To:</strong>=
 [email-masked]; Healey, Forum &lt;[email-masked]=
t&gt;<br /><strong>Subject:</strong> AW: [Healeys] Spark plug gap</span></p=
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">For me, i prefer Champion plugs plugs to N=
GK, but that&acute;s a matter of taste. I think both, Champion and NGK, are=
 of similar quality. Matter of taste, as I wrote. But NOT the car manufactu=
rer determines the plug gap, its the plug manufacturer. Definitely the car =
manufacturer takes this for his specs in the workshop manual.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">There is to much hype about plugs anyway. =
I am working as a professional, Elecrtonics and Elecrtrcian engineer, at a =
big classic car parts supplier here in Europe and I never go away from the =
given plug gap as set by the plug manufacturer. Austin-Healey engines&nbsp;=
 are not high tech, they are tractor engines and can take a lot of misfit, =
but anyway BMC knew at the time what&acute;s best to do with them, even its=
 printed 60 or 70 years ago.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Some people try to adjust the fuel mixture=
 with a CO-tester. You can do that, but it doesn&acute;t give best results =
for road use, especially in hotter climates and high above sea level. </spa=
n></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">When you are very good in engine engineeri=
ng and have all the tools you can try to find some more horsepower in your =
engine, but you always pay that with some more heat produced, which is not =
at all good for our old BMC engines.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T00:06:58+0200</p>
<p style=3D"margin: 0px;">Von: "<a href=3D"mailto:simon.lachlan@alexarevel.=
plus.com">[email-masked]</a>" &lt;<a href=3D"mailto:simo=
[email-masked]">[email-masked]</a>&gt;</p=
<p style=3D"margin: 0px;">An: "<a href=3D"mailto:[email-masked]">=
[email-masked]</a>" &lt;<a href=3D"mailto:[email-masked]=
e">[email-masked]</a>&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">You may be right. Not sure.=
 </span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">Actually I thought that the=
 gap was determined by the car&rsquo;s manufacturer ie one could expect to =
find the same plug in two different cars and to find that the recommended g=
ap was not the same for each car.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">Likewise, the BMC manual su=
ggests Champion plugs at 0.024&rdquo; to 0.026&rdquo; and that was some 60+=
 years ago. I&rsquo;ve always been told that Champion plugs aren&rsquo;t th=
e best in the world and I&rsquo;m sure that a modern NGK can stand a little=
 more heat than the Champions that were around 60 years ago.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">Anyhow, I&rsquo;ll keep an =
eye on them. I&rsquo;m a pretty tame driver so there won&rsquo;t be undue s=
tress under the bonnet.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">Simon</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black; mso-fareast-language: EN-US;">&nbsp;</span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
 0cm 0cm 0cm;">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><strong><span lang=3D"EN-US" style=3D"font-size: 9.0pt; font-f=
amily: 'Arial',sans-serif; color: black;">From:</span></strong><span lang=
=3D"EN-US" style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif; colo=
r: black;"> <a href=3D"mailto:[email-masked]">josef-eckert@t-onli=
ne.de</a> &lt;<a href=3D"mailto:[email-masked]">josef-eckert@t-on=
line.de</a>&gt; <br /><strong><span style=3D"font-family: 'Arial',sans-seri=
f;">Sent:</span></strong> 03 May 2023 20:56<br /><strong><span style=3D"fon=
t-family: 'Arial',sans-serif;">To:</span></strong> <a href=3D"mailto:simon.=
[email-masked]">[email-masked]</a>; <a href=
=3D"mailto:[email-masked]">[email-masked]</a><br /><strong>=
<span style=3D"font-family: 'Arial',sans-serif;">Subject:</span></strong> A=
W: [Healeys] Spark plug gap</span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Spark plugs are designed and tested to be =
used with the gap given by the producer of the spark plug.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">When you widen the gap the plug gets hotte=
r as it is designed for and the electrode can melt or wear very fast.</span=
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Its a very short win you gain modifying th=
em.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">I never understand why people think they a=
re better engineers and know better than the designers of the system they u=
se.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">Josef </span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'A=
rial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">-----Original-Nachricht-----</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Betreff: [Healeys] Spark plug gap</span></p=
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Datum: 2023-05-03T21:39:57+0200</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Von: "Simon Lachlan via Healeys" &lt;<a hre=
f=3D"mailto:[email-masked]">[email-masked]</a>&gt;</span></=
p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">An: "'Healeys'" &lt;<a href=3D"mailto:heale=
[email-masked]">[email-masked]</a>&gt;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">I run my MkII BT7 on NGK BP6ES which were recommended by=
 some of the wise ones on this list.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The car has a &ldquo;Sports&rdquo; coil and a 123Ignitio=
n distributor. DW fast road cam&hellip;etc</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Now, talking of &ldquo;recommended&rdquo;, the rolling r=
oad guys told me to set the plugs at 0.028&rdquo; and pooh-poohed anything =
bigger when I suggested that I&rsquo;d heard of much greater gaps with my a=
pproximate setup.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">So, I went with 0.028.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">The other day, I decided to experiment and set my spare =
set at 0.032&rdquo;. Same NGKs, no mileage on them..decent plugs. Anyhow, i=
t made a very surprising difference. All round performance is much enhanced=
.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Despite it&rsquo;s 3:54 diff and 28% OD, it was never sl=
uggish on our local hills. But now it fairly zooms up them.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">To be frank, all a bit of a surprise.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Not boasting&hellip;just putting that out there in case =
anyone else is thinking of going up a few thou&hellip;..</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">When I asked about gaps a few years back, some of the su=
ggestions were near 0.040&rdquo;. Surely that a bit much?</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">Simon</span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-ser=
if; color: black;">&nbsp;</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
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[email-masked]

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---

From: Chris Dimmock <[email-masked]>
Date: Thu, 4 May 2023 23:21:52 +1000

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	charset=utf-8
Content-Transfer-Encoding: quoted-printable

<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div dir=3D"ltr"></div><div dir=3D"ltr">Jos=
ef</div><div dir=3D"ltr">Seriously?</div><div dir=3D"ltr">What octane leaded=
 fuel are you running in your engine?</div><div dir=3D"ltr">100 octane 5 sta=
r leaded as per the owner=E2=80=99s manual?</div><div dir=3D"ltr">A lot has c=
hanged in the last 60is &nbsp;years mate.&nbsp;</div><div dir=3D"ltr">Fuel o=
ctane. Lead in fuel.&nbsp;</div><div dir=3D"ltr">Do you run your modern radi=
als at the same pressures as 60 year old crossply tyres?</div><div dir=3D"lt=
r">The owner=E2=80=99s manual is irrelevant with regards to spark plug gaps w=
ith modern fuels. Or modern tyres.&nbsp;</div><div dir=3D"ltr">Sincerely&nbs=
p;</div><div dir=3D"ltr"><br></div><div dir=3D"ltr"><br><blockquote type=3D"=
cite">On 4 May 2023, at 9:45 pm, josef-eckert--- via Healeys &lt;healeys@aut=
ox.team.net&gt; wrote:<br><br></blockquote></div><blockquote type=3D"cite"><=
div dir=3D"ltr">=EF=BB=BF<meta http-equiv=3D"Content-Type" content=3D"text/h=
tml; charset=3DUTF-8"><title></title><p style=3D"margin: 0px;"><span style=3D=
"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-de=
coration:none">Sorry, I am out here. This guy wants to play till the engine i=
s shot.<br></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-se=
rif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T12:45:37+0200</p>
<p style=3D"margin: 0px;">Von: "[email-masked]" &lt;simon=
[email-masked]&gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t-=
online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetica=
,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Thanks f=
or that. I=E2=80=99ll certainly bear it in mind. Likewise, I=E2=80=99ll keep=
 a close eye on my engine=E2=80=99s temperature. The latter is quite well pr=
otected with a modern rad, all the correct baffles, 5 blade fan plus electro=
nic fan. But, as I said, I=E2=80=99ll keep an eye on it.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Someone m=
entioned that he used =E2=80=9CIridium=E2=80=9D plugs from NGK. I googled th=
em=E2=80=A6.horribly expensive. Can they be worth it in our old cars?</span>=
</p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Simon</s=
pan></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">&nbsp;</=
span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt 0=
cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong><span lang=3D"EN-US">From:</span></strong><sp=
an lang=3D"EN-US"> [email-masked] &lt;[email-masked]&gt;=
 <br><strong>Sent:</strong> 04 May 2023 07:06<br><strong>To:</strong> simon.=
[email-masked]; Healey, Forum &lt;[email-masked]&gt;<br=
><strong>Subject:</strong> AW: [Healeys] Spark plug gap</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">For me, i prefer Champion plugs plugs to NGK=
, but that=C2=B4s a matter of taste. I think both, Champion and NGK, are of s=
imilar quality. Matter of taste, as I wrote. But NOT the car manufacturer de=
termines the plug gap, its the plug manufacturer. Definitely the car manufac=
turer takes this for his specs in the workshop manual.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">There is to much hype about plugs anyway. I a=
m working as a professional, Elecrtonics and Elecrtrcian engineer, at a big c=
lassic car parts supplier here in Europe and I never go away from the given p=
lug gap as set by the plug manufacturer. Austin-Healey engines&nbsp; are not=
 high tech, they are tractor engines and can take a lot of misfit, but anywa=
y BMC knew at the time what=C2=B4s best to do with them, even its printed 60=
 or 70 years ago.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Some people try to adjust the fuel mixture w=
ith a CO-tester. You can do that, but it doesn=C2=B4t give best results for r=
oad use, especially in hotter climates and high above sea level. </span></p>=

<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">When you are very good in engine engineering=
 and have all the tools you can try to find some more horsepower in your eng=
ine, but you always pay that with some more heat produced, which is not at a=
ll good for our old BMC engines.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T00:06:58+0200</p>
<p style=3D"margin: 0px;">Von: "<a href=3D"mailto:[email-masked]=
lus.com">[email-masked]</a>" &lt;<a href=3D"mailto:simon.=
[email-masked]">[email-masked]</a>&gt;</p>
<p style=3D"margin: 0px;">An: "<a href=3D"mailto:[email-masked]">j=
[email-masked]</a>" &lt;<a href=3D"mailto:[email-masked]"=
>[email-masked]</a>&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">You may be right. Not sure. </=
span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">Actually I thought that the ga=
p was determined by the car=E2=80=99s manufacturer ie one could expect to fi=
nd the same plug in two different cars and to find that the recommended gap w=
as not the same for each car.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">Likewise, the BMC manual sugge=
sts Champion plugs at 0.024=E2=80=9D to 0.026=E2=80=9D and that was some 60+=
 years ago. I=E2=80=99ve always been told that Champion plugs aren=E2=80=99t=
 the best in the world and I=E2=80=99m sure that a modern NGK can stand a li=
ttle more heat than the Champions that were around 60 years ago.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">Anyhow, I=E2=80=99ll keep an e=
ye on them. I=E2=80=99m a pretty tame driver so there won=E2=80=99t be undue=
 stress under the bonnet.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">Simon</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black; mso-fareast-language: EN-US;">&nbsp;</span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt 0=
cm 0cm 0cm;">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><strong><span lang=3D"EN-US" style=3D"font-size: 9.0pt; font-fam=
ily: 'Arial',sans-serif; color: black;">From:</span></strong><span lang=3D"E=
N-US" style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif; color: bla=
ck;"> <a href=3D"mailto:[email-masked]">[email-masked]</=
a> &lt;<a href=3D"mailto:[email-masked]">[email-masked]<=
/a>&gt; <br><strong><span style=3D"font-family: 'Arial',sans-serif;">Sent:</=
span></strong> 03 May 2023 20:56<br><strong><span style=3D"font-family: 'Ari=
al',sans-serif;">To:</span></strong> <a href=3D"mailto:simon.lachlan@alexare=
vel.plus.com">[email-masked]</a>; <a href=3D"mailto:heale=
[email-masked]">[email-masked]</a><br><strong><span style=3D"font=
-family: 'Arial',sans-serif;">Subject:</span></strong> AW: [Healeys] Spark p=
lug gap</span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Spark plugs are designed and tested to be us=
ed with the gap given by the producer of the spark plug.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">When you widen the gap the plug gets hotter a=
s it is designed for and the electrode can melt or wear very fast.</span></p=
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Its a very short win you gain modifying them=
.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">I never understand why people think they are=
 better engineers and know better than the designers of the system they use.=
</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">Josef </span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 10.0pt; font-family: 'Ar=
ial',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">-----Original-Nachricht-----</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">Betreff: [Healeys] Spark plug gap</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">Datum: 2023-05-03T21:39:57+0200</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">Von: "Simon Lachlan via Healeys" &lt;<a href=3D=
"mailto:[email-masked]">[email-masked]</a>&gt;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">An: "'Healeys'" &lt;<a href=3D"mailto:healeys=
@autox.team.net">[email-masked]</a>&gt;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-size: 9.0pt; font-family: 'Ari=
al',sans-serif; color: black;">&nbsp;</span></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">I run my MkII BT7 on NGK BP6ES which were recommended by so=
me of the wise ones on this list.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">The car has a =E2=80=9CSports=E2=80=9D coil and a 123Igniti=
on distributor. DW fast road cam=E2=80=A6etc</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling r=
oad guys told me to set the plugs at 0.028=E2=80=9D and pooh-poohed anything=
 bigger when I suggested that I=E2=80=99d heard of much greater gaps with my=
 approximate setup.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">So, I went with 0.028.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">The other day, I decided to experiment and set my spare set=
 at 0.032=E2=80=9D. Same NGKs, no mileage on them..decent plugs. Anyhow, it m=
ade a very surprising difference. All round performance is much enhanced.</s=
pan></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">Despite it=E2=80=99s 3:54 diff and 28% OD, it was never slu=
ggish on our local hills. But now it fairly zooms up them.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">To be frank, all a bit of a surprise.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">Not boasting=E2=80=A6just putting that out there in case an=
yone else is thinking of going up a few thou=E2=80=A6..</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">When I asked about gaps a few years back, some of the sugge=
stions were near 0.040=E2=80=9D. Surely that a bit much?</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">Simon</span></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom-=
alt: auto;"><span style=3D"font-size: 9.0pt; font-family: 'Arial',sans-serif=
; color: black;">&nbsp;</span></p>
</div>
</div>
<p class=3D"MsoNormal">&nbsp;</p>
</div>
</div>=EF=BB=BF<span>_______________________________________________</span><=
br><span>Support Team.Net http://www.team.net/donate.html</span><br><span>Su=
ggested annual donation &nbsp;$12.75</span><br><span></span><br><span>Archiv=
e: http://www.team.net/pipermail/healeys http://autox.team.net/archive/heale=
ys</span><br><span></span><br><span>[email-masked]</span><br><span>h=
ttp://autox.team.net/mailman/listinfo/healeys</span><br><span></span><br><sp=
an>Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/austin.=
[email-masked]</span><br><span></span><br></div></blockquote></body></html=
>=

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[email-masked]

--===============7085119741443542180==--

---

From: Ricchardd Mayor via Healeys <[email-masked]>
Date: Thu, 4 May 2023 07:10:47 -0700

--===============7913926374614140780==

--Apple-Mail=_1177C2A4-072B-4ACD-95F5-16CC5F3838BA
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

On no!  Who knew that gapping your plugs at .032 would ruin your engine. =
Thank you Josef for saving us. =20

Richard Mayor
[email-masked]

> On May 4, 2023, at 4:43 AM, josef-eckert--- via Healeys =
<[email-masked]> wrote:
> Von: "[email-masked]" =
> Thanks for that. I=E2=80=99ll certainly bear it in mind. Likewise, =
I=E2=80=99ll keep a close eye on my engine=E2=80=99s temperature. The =
latter is quite well protected with a modern rad, all the correct =
baffles, 5 blade fan plus electronic fan. But, as I said, I=E2=80=99ll =
keep an eye on it.
>=20
> Someone mentioned that he used =E2=80=9CIridium=E2=80=9D plugs from =
NGK. I googled them=E2=80=A6.horribly expensive. Can they be worth it in =
our old cars?
>=20
> Simon
>=20
> =20
> From: [email-masked] <[email-masked]>=20
> Sent: 04 May 2023 07:06
> To: [email-masked]; Healey, Forum =
<[email-masked]>
> For me, i prefer Champion plugs plugs to NGK, but that=C2=B4s a matter =
of taste. I think both, Champion and NGK, are of similar quality. Matter =
of taste, as I wrote. But NOT the car manufacturer determines the plug =
gap, its the plug manufacturer. Definitely the car manufacturer takes =
this for his specs in the workshop manual.
> There is to much hype about plugs anyway. I am working as a =
professional, Elecrtonics and Elecrtrcian engineer, at a big classic car =
parts supplier here in Europe and I never go away from the given plug =
gap as set by the plug manufacturer. Austin-Healey engines  are not high =
tech, they are tractor engines and can take a lot of misfit, but anyway =
BMC knew at the time what=C2=B4s best to do with them, even its printed =
60 or 70 years ago.
> Some people try to adjust the fuel mixture with a CO-tester. You can =
do that, but it doesn=C2=B4t give best results for road use, especially =
in hotter climates and high above sea level.
> When you are very good in engine engineering and have all the tools =
you can try to find some more horsepower in your engine, but you always =
pay that with some more heat produced, which is not at all good for our =
old BMC engines.
> Von: "[email-masked] =
<[email-masked] =
> Actually I thought that the gap was determined by the car=E2=80=99s =
manufacturer ie one could expect to find the same plug in two different =
cars and to find that the recommended gap was not the same for each car.
>=20
> Likewise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to =
0.026=E2=80=9D and that was some 60+ years ago. I=E2=80=99ve always been =
told that Champion plugs aren=E2=80=99t the best in the world and I=E2=80=99=
m sure that a modern NGK can stand a little more heat than the Champions =
that were around 60 years ago.
>=20
> Anyhow, I=E2=80=99ll keep an eye on them. I=E2=80=99m a pretty tame =
driver so there won=E2=80=99t be undue stress under the bonnet.
>=20
> Simon
>=20
> =20
> Sent: 03 May 2023 20:56
> To: [email-masked] =
> Spark plugs are designed and tested to be used with the gap given by =
the producer of the spark plug.
> When you widen the gap the plug gets hotter as it is designed for and =
the electrode can melt or wear very fast.
> I never understand why people think they are better engineers and know =
> Von: "Simon Lachlan via Healeys" <[email-masked] =
> An: "'Healeys'" <[email-masked] =
> =20
> =20
> =20
> I run my MkII BT7 on NGK BP6ES which were recommended by some of the =
wise ones on this list.
>=20
> The car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition =
distributor. DW fast road cam=E2=80=A6etc
>=20
> Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys =
told me to set the plugs at 0.028=E2=80=9D and pooh-poohed anything =
bigger when I suggested that I=E2=80=99d heard of much greater gaps with =
my approximate setup.
>=20
> So, I went with 0.028.
>=20
> The other day, I decided to experiment and set my spare set at =
0.032=E2=80=9D. Same NGKs, no mileage on them..decent plugs. Anyhow, it =
made a very surprising difference. All round performance is much =
enhanced.
>=20
> Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on =
our local hills. But now it fairly zooms up them.
> Not boasting=E2=80=A6just putting that out there in case anyone else =
is thinking of going up a few thou=E2=80=A6..
>=20
> When I asked about gaps a few years back, some of the suggestions were =
> Archive: http://www.team.net/pipermail/healeys =
http://autox.team.net/archive/healeys
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/healeys/[email-masked]

--Apple-Mail=_1177C2A4-072B-4ACD-95F5-16CC5F3838BA
Content-Transfer-Encoding: quoted-printable
	charset=utf-8

<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">On no! &nbsp;Who knew that gapping your plugs at .032 would =
ruin your engine. Thank you Josef for saving us. &nbsp;<div class=3D""><br=
 class=3D""></div><div class=3D"">Richard&nbsp;Mayor<div =
apple-content-edited=3D"true" class=3D""><a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><br class=3D"">

</div>
<br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On May 4, 2023, at 4:43 AM, josef-eckert--- via Healeys =
&lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3DUTF-8" =
class=3D""><title class=3D""></title><div class=3D""><div style=3D"margin:=
 0px;" class=3D""><span style=3D"font-family: arial, helvetica, =
sans-serif; font-size: 10pt; text-decoration: none;" class=3D"">Sorry, I =
am out here. This guy wants to play till the engine is shot.<br =
class=3D""></span></div><p style=3D"margin: 0px;" class=3D""><span =
style=3D"font-family: arial, helvetica, sans-serif; font-size: 10pt; =
text-decoration: none;" class=3D"">&nbsp;</span></p><p style=3D"margin: =
0px;" class=3D"">&nbsp;</p><p style=3D"margin: 0px;" =
class=3D"">&nbsp;</p><div style=3D"margin: 0px;" =
class=3D"">-----Original-Nachricht-----</div><div style=3D"margin: 0px;" =
class=3D"">Betreff: RE: [Healeys] Spark plug gap</div><div =
style=3D"margin: 0px;" class=3D"">Datum: =
2023-05-04T12:45:37+0200</div><div style=3D"margin: 0px;" class=3D"">Von: =
"<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</div><div =
style=3D"margin: 0px;" class=3D"">An: "<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</div><p style=3D"margin: =
0px;" class=3D"">&nbsp;</p><p style=3D"margin: 0px;" =
class=3D"">&nbsp;</p><p style=3D"margin: 0px;" class=3D"">&nbsp;</p>
<div style=3D"position: relative; font-style: normal; font-variant: =
normal; font-weight: normal; font-size: 12px; line-height: normal; =
font-family: Arial, Helvetica, sans-serif;" class=3D"">
<div class=3D"WordSection1"><p class=3D"MsoNormal"><span =
style=3D"mso-fareast-language: EN-US;" class=3D"">Thanks for that. =
I=E2=80=99ll certainly bear it in mind. Likewise, I=E2=80=99ll keep a =
close eye on my engine=E2=80=99s temperature. The latter is quite well =
protected with a modern rad, all the correct baffles, 5 blade fan plus =
electronic fan. But, as I said, I=E2=80=99ll keep an eye on =
it.</span></p><p class=3D"MsoNormal"><span style=3D"mso-fareast-language: =
EN-US;" class=3D"">Someone mentioned that he used =E2=80=9CIridium=E2=80=9D=
 plugs from NGK. I googled them=E2=80=A6.horribly expensive. Can they be =
worth it in our old cars?</span></p><p class=3D"MsoNormal"><span =
style=3D"mso-fareast-language: EN-US;" class=3D"">Simon</span></p><div =
class=3D""><span style=3D"mso-fareast-language: EN-US;" =
class=3D"">&nbsp;</span><br class=3D"webkit-block-placeholder"></div>
<div class=3D"">
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: =
3.0pt 0cm 0cm 0cm;" class=3D""><p class=3D"MsoNormal"><strong =
class=3D""><span lang=3D"EN-US" class=3D"">From:</span></strong><span =
lang=3D"EN-US" class=3D""> <a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a> &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; <br class=3D""><strong =
class=3D"">Sent:</strong> 04 May 2023 07:06<br class=3D""><strong =
class=3D"">To:</strong> <a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>; Healey, Forum &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;<br class=3D""><strong =
class=3D"">Subject:</strong> AW: [Healeys] Spark plug gap</span></p>
</div>
</div><div class=3D"">&nbsp;<br =
class=3D"webkit-block-placeholder"></div><div style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif;" class=3D"">For me, i prefer Champion plugs plugs to NGK, =
but that=C2=B4s a matter of taste. I think both, Champion and NGK, are =
of similar quality. Matter of taste, as I wrote. But NOT the car =
manufacturer determines the plug gap, its the plug manufacturer. =
Definitely the car manufacturer takes this for his specs in the workshop =
manual.</span></div><div style=3D"margin: 0px;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Arial, sans-serif;" =
class=3D"">There is to much hype about plugs anyway. I am working as a =
professional, Elecrtonics and Elecrtrcian engineer, at a big classic car =
parts supplier here in Europe and I never go away from the given plug =
gap as set by the plug manufacturer. Austin-Healey engines&nbsp; are not =
high tech, they are tractor engines and can take a lot of misfit, but =
anyway BMC knew at the time what=C2=B4s best to do with them, even its =
printed 60 or 70 years ago.</span></div><div style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif;" class=3D"">Some people try to adjust the fuel mixture with =
a CO-tester. You can do that, but it doesn=C2=B4t give best results for =
road use, especially in hotter climates and high above sea level. =
</span></div><div style=3D"margin: 0px;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Arial, sans-serif;" class=3D"">When=
 you are very good in engine engineering and have all the tools you can =
try to find some more horsepower in your engine, but you always pay that =
with some more heat produced, which is not at all good for our old BMC =
engines.</span></div><p style=3D"margin: 0px;" class=3D"">&nbsp;</p><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Arial, sans-serif;" class=3D"">Josef</span></div><p =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Arial, sans-serif;" class=3D"">&nbsp;</span></p><p =
style=3D"margin: 0px;" class=3D"">&nbsp;</p><p style=3D"margin: 0px;" =
class=3D"">&nbsp;</p><div style=3D"margin: 0px;" =
class=3D"">-----Original-Nachricht-----</div><div style=3D"margin: 0px;" =
class=3D"">Betreff: RE: [Healeys] Spark plug gap</div><div =
style=3D"margin: 0px;" class=3D"">Datum: =
2023-05-04T00:06:58+0200</div><div style=3D"margin: 0px;" class=3D"">Von: =
"<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</div><div =
style=3D"margin: 0px;" class=3D"">An: "<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</div><p style=3D"margin: =
0px;" class=3D"">&nbsp;</p><p style=3D"margin: 0px;" =
class=3D"">&nbsp;</p><p style=3D"margin: 0px;" class=3D"">&nbsp;</p>
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: =
auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">You may be right. Not sure. =
</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; =
mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Actually I thought that the =
gap was determined by the car=E2=80=99s manufacturer ie one could expect =
to find the same plug in two different cars and to find that the =
recommended gap was not the same for each car.</span></p><p =
class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; =
mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Likewise, the BMC manual =
suggests Champion plugs at 0.024=E2=80=9D to 0.026=E2=80=9D and that was =
some 60+ years ago. I=E2=80=99ve always been told that Champion plugs =
aren=E2=80=99t the best in the world and I=E2=80=99m sure that a modern =
NGK can stand a little more heat than the Champions that were around 60 =
years ago.</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: =
auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Anyhow, I=E2=80=99ll keep an =
eye on them. I=E2=80=99m a pretty tame driver so there won=E2=80=99t be =
undue stress under the bonnet.</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" =
class=3D"">Simon</span></p><div style=3D"" class=3D""><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" =
class=3D"">&nbsp;</span><br class=3D"webkit-block-placeholder"></div>
<div class=3D"">
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: =
3.0pt 0cm 0cm 0cm;" class=3D""><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><strong =
class=3D""><span lang=3D"EN-US" style=3D"font-size: 9pt; font-family: =
Arial, sans-serif;" class=3D"">From:</span></strong><span lang=3D"EN-US" =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D""> <a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a> &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; <br class=3D""><strong =
class=3D""><span style=3D"font-family: 'Arial',sans-serif;" =
class=3D"">Sent:</span></strong> 03 May 2023 20:56<br class=3D""><strong =
class=3D""><span style=3D"font-family: 'Arial',sans-serif;" =
class=3D"">To:</span></strong> <a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>; <a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><strong =
class=3D""><span style=3D"font-family: 'Arial',sans-serif;" =
class=3D"">Subject:</span></strong> AW: [Healeys] Spark plug =
gap</span></p>
</div>
</div><div style=3D"" class=3D""><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">&nbsp;</span><br =
class=3D"webkit-block-placeholder"></div><div style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif;" class=3D"">Spark plugs are designed and tested to be used =
with the gap given by the producer of the spark plug.</span></div><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Arial, sans-serif;" class=3D"">When you widen the gap the =
plug gets hotter as it is designed for and the electrode can melt or =
wear very fast.</span></div><div style=3D"margin: 0px;" class=3D""><span =
style=3D"font-size: 10pt; font-family: Arial, sans-serif;" class=3D"">Its =
a very short win you gain modifying them.</span></div><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 10pt; =
font-family: Arial, sans-serif;" class=3D"">I never understand why =
people think they are better engineers and know better than the =
designers of the system they use.</span></div><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><div style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif;" class=3D"">Josef </span></div><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 10pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><div style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">-----Original-Nachricht-----</span></div><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Betreff: [Healeys] Spark =
plug gap</span></div><div style=3D"margin: 0px;" class=3D""><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" =
class=3D"">Datum: 2023-05-03T21:39:57+0200</span></div><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Von: "Simon Lachlan via =
Healeys" &lt;<a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</span></div><div =
style=3D"margin: 0px;" class=3D""><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">An: "'Healeys'" &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt;</span></div><p style=3D"margin: =
0px;" class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p><p style=3D"margin: 0px;" =
class=3D""><span style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;" class=3D"">&nbsp;</span></p>
<div class=3D"">
<div class=3D""><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: =
auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">I run my MkII BT7 on NGK =
BP6ES which were recommended by some of the wise ones on this =
list.</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: =
auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">The car has a =E2=80=9CSports=E2=
=80=9D coil and a 123Ignition distributor. DW fast road =
cam=E2=80=A6etc</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D"">Now, =
talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys told me =
to set the plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when =
I suggested that I=E2=80=99d heard of much greater gaps with my =
approximate setup.</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D"">So, =
I went with 0.028.</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D"">The =
other day, I decided to experiment and set my spare set at 0.032=E2=80=9D.=
 Same NGKs, no mileage on them..decent plugs. Anyhow, it made a very =
surprising difference. All round performance is much =
enhanced.</span></p><p class=3D"MsoNormal" style=3D"mso-margin-top-alt: =
auto; mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">Despite it=E2=80=99s 3:54 =
diff and 28% OD, it was never sluggish on our local hills. But now it =
fairly zooms up them.</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D"">To =
be frank, all a bit of a surprise.</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" class=3D"">Not =
boasting=E2=80=A6just putting that out there in case anyone else is =
thinking of going up a few thou=E2=80=A6..</span></p><p =
class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; =
mso-margin-bottom-alt: auto;"><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">When I asked about gaps a =
few years back, some of the suggestions were near 0.040=E2=80=9D. Surely =
that a bit much?</span></p><p class=3D"MsoNormal" =
style=3D"mso-margin-top-alt: auto; mso-margin-bottom-alt: auto;"><span =
style=3D"font-size: 9pt; font-family: Arial, sans-serif;" =
class=3D"">Simon</span></p>
</div>
</div><div style=3D"" class=3D""><span style=3D"font-size: 9pt; =
font-family: Arial, sans-serif;" class=3D"">&nbsp;</span><br =
class=3D"webkit-block-placeholder"></div>
</div>
</div><div class=3D"">&nbsp;<br class=3D"webkit-block-placeholder"></div>
</div>
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class=3D""><br class=3D""></div></blockquote></div><br =
class=3D""></div></body></html>=

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[email-masked]

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---

From: josef-eckert--- via Healeys <[email-masked]>
Date: Thu, 4 May 2023 16:27:58 +0200 (CEST)

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Chris,
Seriously, here in Europe we have Shell V-Power (100 octane), or ARAL=20
Ultimate (102 octane). I usually fill up  with Shell V-Power at our filling=
=20
station round the corner. I recommend to use either Shell or ARAL all my=20
friends and customers.
=20
Btw. I have Dunlop and Avon crossply tyres on my 100 and 3000. I love=20
crossplys on Healeys, as they give a nice soft ride.
Here its not very pleasant to do long trips on motorways in a Healey, as=20
traffic is enormeous and lots of congestions and plenty of lorries.
=20
Josef
=20
=20
=20
-----Original-Nachricht-----
Betreff: Re: [Healeys] Spark plug gap
Datum: 2023-05-04T15:22:10+0200
Von: "Chris Dimmock" <[email-masked]>
An: "[email-masked]" <[email-masked]>
=20
=20
=20
=20
Josef
Seriously?
What octane leaded fuel are you running in your engine?
100 octane 5 star leaded as per the owner=E2=80=99s manual?
A lot has changed in the last 60is  years mate.=20
Fuel octane. Lead in fuel.=20
Do you run your modern radials at the same pressures as 60 year old=20
crossply tyres?
The owner=E2=80=99s manual is irrelevant with regards to spark plug gaps wi=
th=20
modern fuels. Or modern tyres.=20
Sincerely=20
=20

    On 4 May 2023, at 9:45 pm, josef-eckert--- via Healeys
    <[email-masked]> wrote:

    -----Original-Nachricht-----
    Betreff: RE: [Healeys] Spark plug gap
    Datum: 2023-05-04T12:45:37+0200
    Von: "[email-masked]"
    <[email-masked]>
    An: "[email-masked]" <[email-masked]>
    =20
    =20
    =20

    Thanks for that. I=E2=80=99ll certainly bear it in mind. Likewise, I=E2=
=80=99ll keep a
    close eye on my engine=E2=80=99s temperature. The latter is quite well
    protected with a modern rad, all the correct baffles, 5 blade fan plus
    electronic fan. But, as I said, I=E2=80=99ll keep an eye on it.

    Someone mentioned that he used =E2=80=9CIridium=E2=80=9D plugs from NGK=
. I googled
    them=E2=80=A6.horribly expensive. Can they be worth it in our old cars?

    Simon

    =20

    From: [email-masked] <[email-masked]>
    Sent: 04 May 2023 07:06
    To: [email-masked]; Healey, Forum
    <[email-masked]>
    Subject: AW: [Healeys] Spark plug gap

    =20

    For me, i prefer Champion plugs plugs to NGK, but that=C2=B4s a matter =
of
    taste. I think both, Champion and NGK, are of similar quality. Matter
    of taste, as I wrote. But NOT the car manufacturer determines the plug
    gap, its the plug manufacturer. Definitely the car manufacturer takes
    this for his specs in the workshop manual.
    There is to much hype about plugs anyway. I am working as a
    professional, Elecrtonics and Elecrtrcian engineer, at a big classic
    car parts supplier here in Europe and I never go away from the given
    plug gap as set by the plug manufacturer. Austin-Healey engines  are
    not high tech, they are tractor engines and can take a lot of misfit,
    but anyway BMC knew at the time what=C2=B4s best to do with them, even =
its
    printed 60 or 70 years ago.
    Some people try to adjust the fuel mixture with a CO-tester. You can do
    that, but it doesn=C2=B4t give best results for road use, especially in
    hotter climates and high above sea level.
    When you are very good in engine engineering and have all the tools you
    can try to find some more horsepower in your engine, but you always pay
    that with some more heat produced, which is not at all good for our old
    BMC engines.
    =20
    Josef
    =20
    =20
    =20
    -----Original-Nachricht-----
    Betreff: RE: [Healeys] Spark plug gap
    Datum: 2023-05-04T00:06:58+0200
    Von: "[email-masked]
    [email-masked]
    =20
    =20
    =20

    Actually I thought that the gap was determined by the car=E2=80=99s
    manufacturer ie one could expect to find the same plug in two different
    cars and to find that the recommended gap was not the same for each
    car.

    Likewise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to 0=
.026=E2=80=9D
    and that was some 60+ years ago. I=E2=80=99ve always been told that Cha=
mpion
    plugs aren=E2=80=99t the best in the world and I=E2=80=99m sure that a =
modern NGK can
    stand a little more heat than the Champions that were around 60 years
    ago.

    Anyhow, I=E2=80=99ll keep an eye on them. I=E2=80=99m a pretty tame dri=
ver so there
    won=E2=80=99t be undue stress under the bonnet.

    Simon

    =20

    Sent: 03 May 2023 20:56

    =20

    Spark plugs are designed and tested to be used with the gap given by
    the producer of the spark plug.
    When you widen the gap the plug gets hotter as it is designed for and
    the electrode can melt or wear very fast.
    Its a very short win you gain modifying them.
    I never understand why people think they are better engineers and know
    better than the designers of the system they use.
    =20
    Josef
    =20
    =20
    =20
    =20
    -----Original-Nachricht-----
    Betreff: [Healeys] Spark plug gap
    Datum: 2023-05-03T21:39:57+0200
    Von: "Simon Lachlan via Healeys" <[email-masked]
=20
    =20
    =20
    =20

    I run my MkII BT7 on NGK BP6ES which were recommended by some of the
    wise ones on this list.

    The car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition distribut=
or. DW fast road
    cam=E2=80=A6etc

    Now, talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys to=
ld me to set the
    plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when I suggeste=
d that
    I=E2=80=99d heard of much greater gaps with my approximate setup.

    So, I went with 0.028.

    Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our=
 local
    hills. But now it fairly zooms up them.

    Not boasting=E2=80=A6just putting that out there in case anyone else is
    thinking of going up a few thou=E2=80=A6..

    Simon

    =20

    =20

    Archive: http://www.team.net/pipermail/healeys
    http://autox.team.net/archive/healeys

    [email-masked]

    Unsubscribe/Manage:
    http://autox.team.net/mailman/options/healeys/[email-masked]

=EF=BB=BF
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">Chris,<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Seriously, here in =
Europe we have Shell V-Power (100 octane), or ARAL Ultimate (102 octane). I=
 usually fill up&nbsp; with Shell V-Power at our filling station round the =
corner. I recommend to use either Shell or ARAL all my friends and customer=
s.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Btw. I have Dunlop =
and Avon crossply tyres on my 100 and 3000. I love crossplys on Healeys, as=
 they give a nice soft ride.</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Here its not very p=
leasant to do long trips on motorways in a Healey, as traffic is enormeous =
and lots of congestions and plenty of lorries.</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: Re: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T15:22:10+0200</p>
<p style=3D"margin: 0px;">Von: "Chris Dimmock" &lt;[email-masked]&=
gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t=
-online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div dir=3D"ltr">&nbsp;</div>
<div dir=3D"ltr">Josef</div>
<div dir=3D"ltr">Seriously?</div>
<div dir=3D"ltr">What octane leaded fuel are you running in your engine?</d=
iv>
<div dir=3D"ltr">100 octane 5 star leaded as per the owner&rsquo;s manual?<=
/div>
<div dir=3D"ltr">A lot has changed in the last 60is &nbsp;years mate.&nbsp;=
</div>
<div dir=3D"ltr">Fuel octane. Lead in fuel.&nbsp;</div>
<div dir=3D"ltr">Do you run your modern radials at the same pressures as 60=
 year old crossply tyres?</div>
<div dir=3D"ltr">The owner&rsquo;s manual is irrelevant with regards to spa=
rk plug gaps with modern fuels. Or modern tyres.&nbsp;</div>
<div dir=3D"ltr">Sincerely&nbsp;</div>
<div dir=3D"ltr">&nbsp;</div>
<div dir=3D"ltr"><br />
<blockquote>On 4 May 2023, at 9:45 pm, josef-eckert--- via Healeys &lt;heal=
[email-masked]&gt; wrote:<br /><br /></blockquote>
</div>
<blockquote>
<div dir=3D"ltr">
<p style=3D"margin: 0px;"><span style=3D"font-family: arial,helvetica,sans-=
serif; font-size: 10pt; color: #000000; text-decoration: none;">Sorry, I am=
 out here. This guy wants to play till the engine is shot.<br /></span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family: arial,helvetica,sans-=
serif; font-size: 10pt; color: #000000; text-decoration: none;">&nbsp;</spa=
n></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T12:45:37+0200</p>
<p style=3D"margin: 0px;">Von: "[email-masked]" &lt;simo=
[email-masked]&gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t=
-online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Thanks =
for that. I&rsquo;ll certainly bear it in mind. Likewise, I&rsquo;ll keep a=
 close eye on my engine&rsquo;s temperature. The latter is quite well prote=
cted with a modern rad, all the correct baffles, 5 blade fan plus electroni=
c fan. But, as I said, I&rsquo;ll keep an eye on it.</span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Someone=
 mentioned that he used &ldquo;Iridium&rdquo; plugs from NGK. I googled the=
m&hellip;.horribly expensive. Can they be worth it in our old cars?</span><=
/p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">Simon</=
span></p>
<p class=3D"MsoNormal"><span style=3D"mso-fareast-language: EN-US;">&nbsp;<=
/span></p>
<div>
<div style=3D"border: none; border-top: solid #E1E1E1 1.0pt; padding: 3.0pt=
 0cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong><span lang=3D"EN-US">From:</span></strong><s=
pan lang=3D"EN-US"> [email-masked] &lt;[email-masked]&g=
t; <br /><strong>Sent:</strong> 04 May 2023 07:06<br /><strong>To:</strong>=
 [email-masked]; Healey, Forum &lt;[email-masked]=
t&gt;<br /><strong>Subject:</strong> AW: [Healeys] Spark plug gap</span></p=
</div>
</div>
_______________________________________________<br />Support Team.Net http:=
//www.team.net/donate.html<br />Suggested annual donation &nbsp;$12.75<br /=
><br />Archive: http://www.team.net/pipermail/healeys http://autox.team.net=
/archive/healeys<br /><br />[email-masked]<br />http://autox.team.n=
et/mailman/listinfo/healeys<br /><br />Unsubscribe/Manage: http://autox.tea=
m.net/mailman/options/healeys/[email-masked]<br /><br /></div>
</blockquote>
</div>=EF=BB=BF</body></html>
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[email-masked]

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---

From: Bob Spidell <[email-masked]>
Date: Thu, 4 May 2023 07:56:15 -0700

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I'll chime in here (as is my wont). I'm not an EE--my electrical 
knowledge is self-taught--so if I'm incorrect feel free to correct.

The theoretical output of a coil--which is essentially half of an AC 
transformer--is determined by the ratio of its secondary winding to its 
primary. For example, a coil with 10 primary windings and 20,000 
secondary windings will boost the primary 'signal' 2,000 times, so it 
would boost a primary signal of 12V to 24,000 volts. When the primary 
pulse to the coil is discontinued--e.g. points open--both the primary 
and secondary induced electrical fields collapse, and the secondary 
field is directed to the plugs*. The secondary field collapses until it 
produces sufficient voltage to overcome the resistance of the plug gap; 
hence the width of the gap determines the strength of the spark. For 
example--pulling numbers out of my exhaust pipe--if a 0.025" gap 
requires 10K volts to produce a spark, then a 0.030" gap might require 
12K volts to produce a spark. So, a larger gap produces a 'hotter' 
spark, up to the theoretical limit of the coil, and a hotter spark is 
better, no? Well, yes and no; theoretically, as long as the spark is hot 
enough to jump the gap it will ignite a proper mixture. A very lean 
mixture is harder to ignite, and a very rich mixture could 'drown' the 
spark ('stratified charge' engines use a richer mixture to ignite a 
leaner mixture). A hotter spark may more reliably ignite a non-ideal 
mixture, and may help a bit to ignite a proper one (higher compression 
engines require a hotter spark). But, as Josef noted, since every spark 
transmits some of the non-ground electrode--probably billions of 
atoms--to the ground electrode a hotter spark will erode the electrode 
faster (since erosion starts with the first spark and with a wider gap 
you should re-gap more often). Note condensers (capacitors) are used in 
points systems and SU fuel pumps to suppress spark arcing and subsequent 
points erosion. Which is why ...

Exotic metal--platinum or iridium--plugs are more resistant to erosion, 
which is why newer cars can go 80K miles or more without a 'tuneup,' 
which, for all intents-and-purposes just means swapping plugs (note they 
come in 'single' (default) or 'dual' types, meaning one or both 
electrodes are the exotic metal, respectively) . Old-style plugs with 
copper and steel electrodes can reliably go 15K miles or more, with one 
or two re-gaps, so exotic metal plugs aren't particularly useful for our 
cars which might do a couple thousand miles a year but, hey, knock 
yourself out. Note that platinum and iridium plugs come pre-gapped, and 
you'd best not mess with them. When I swapped plugs on my '08 Mustang I 
couldn't find a gap spec anywhere, but IIRC I futzed with them anyway 
(of course) and think they were all about 0.025". Fortunately, the car 
still ran well after my meddling and I traded it in in a few years 
anyway. Curiously, I watched a David Vizard video where he claimed he 
saw a /slight/ mileage increase using E3 'DiamondFire' plugs, so there 
may be something to the plug voodoo. Fun fact: All the iridium on planet 
Earth came from a single asteroid, and is found in a layer of said earth 
deposited around the same time the dinosaurs went kaput. Coincidence? I 
think not.

Anybody who's worked on 'modern' cars, say, newer than 2000MY or so, has 
noted 'Coil On Plug' ('COP') technology, where each plug get its own 
coil. Now, the coils on these are small, about the size of an old 35mm 
film canister--remember those?--and you might say to yourself 'Self, how 
do they stuff all that wiring into that little film canister' and the 
answer is, the wires gotta be real tiny and, yep, as you might expect 
they are fragile compared to our Bud Light can-sized (sorry) old school 
Lucas coils. Early COP systems--looking at you, VW--were prone to 
gremlins and I still hear about COP failures on newer cars and other 
makes, esp. with DOHC engines which always, eventually, seem to get 
leaky valve cover gaskets which dump oil into the plug tubes (as opposed 
to leaky Healey valve cover gaskets which just dump oil, well, everywhere).

OK, caffeine rush is fading. Ciao.

Bob

* Note coils for our Healeys come with either 'SW' ('switch;' i.e. 
ignition switch)  and 'CB' ('contact breaker;' i.e. points/distributor)  
or '+' and '-' labels on the primary terminals. They'll work either way, 
but some voodoo is employed whereby, when properly connected the 
secondary field is routed in series with the primary circuit to give a 
slight boost to produced spark.

On 5/4/2023 4:43 AM, josef-eckert--- via Healeys wrote:
> Thanks for that. I’ll certainly bear it in mind. Likewise, I’ll keep a 
> close eye on my engine’s temperature. The latter is quite well 
> electronic fan. But, as I said, I’ll keep an eye on it.
>
> Someone mentioned that he used “Iridium” plugs from NGK. I googled 
> them….horribly expensive. Can they be worth it in our old cars?
>
> Simon
>
> *From:[email-masked] <[email-masked]>
> *Sent:* 04 May 2023 07:06
> *To:* [email-masked]; Healey, Forum 
> <[email-masked]>
> *Subject:* AW: [Healeys] Spark plug gap
>
> For me, i prefer Champion plugs plugs to NGK, but that´s a matter of 
> but anyway BMC knew at the time what´s best to do with them, even its 
> Some people try to adjust the fuel mixture with a CO-tester. You can 
> do that, but it doesn´t give best results for road use, especially in 
> When you are very good in engine engineering and have all the tools 
> you can try to find some more horsepower in your engine, but you 
> always pay that with some more heat produced, which is not at all good 
> for our old BMC engines.
>
> Josef
>
> Actually I thought that the gap was determined by the car’s 
> manufacturer ie one could expect to find the same plug in two 
> different cars and to find that the recommended gap was not the same 
> for each car.
>
> Likewise, the BMC manual suggests Champion plugs at 0.024” to 0.026” 
> and that was some 60+ years ago. I’ve always been told that Champion 
> plugs aren’t the best in the world and I’m sure that a modern NGK can 
> stand a little more heat than the Champions that were around 60 years ago.
>
> Anyhow, I’ll keep an eye on them. I’m a pretty tame driver so there 
> won’t be undue stress under the bonnet.
>
> Simon
>
> *From:[email-masked] <[email-masked]>
> *Sent:* 03 May 2023 20:56
> *To:* [email-masked]; [email-masked]
> *Subject:* AW: [Healeys] Spark plug gap
>
> The car has a “Sports” coil and a 123Ignition distributor. DW fast 
> road cam…etc
>
> Now, talking of “recommended”, the rolling road guys told me to set 
> the plugs at 0.028” and pooh-poohed anything bigger when I suggested 
> that I’d heard of much greater gaps with my approximate setup.
>
> So, I went with 0.028.
>
> The other day, I decided to experiment and set my spare set at 0.032”. 
> Despite it’s 3:54 diff and 28% OD, it was never sluggish on our local 
> Not boasting…just putting that out there in case anyone else is 
> thinking of going up a few thou…..
>
> near 0.040”. Surely that a bit much?
>
> Simon
>
> 
>
> Support Team.Nethttp://www.team.net/donate.html
> Archive:http://www.team.net/pipermail/healeys  http://autox.team.net/archive/healeys
>
> [email-masked]
> Unsubscribe/Manage:http://autox.team.net/mailman/options/healeys/[email-masked]
>

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<html>
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  </head>
  <body>
    I'll chime in here (as is my wont). I'm not an EE--my electrical
    knowledge is self-taught--so if I'm incorrect feel free to correct.<br>
    <br>
    The theoretical output of a coil--which is essentially half of an AC
    transformer--is determined by the ratio of its secondary winding to
    its primary. For example, a coil with 10 primary windings and 20,000
    secondary windings will boost the primary 'signal' 2,000 times, so
    it would boost a primary signal of 12V to 24,000 volts. When the
    primary pulse to the coil is discontinued--e.g. points open--both
    the primary and secondary induced electrical fields collapse, and
    the secondary field is directed to the plugs*. The secondary field
    collapses until it produces sufficient voltage to overcome the
    resistance of the plug gap; hence the width of the gap determines
    the strength of the spark. For example--pulling numbers out of my
    exhaust pipe--if a 0.025" gap requires 10K volts to produce a spark,
    then a 0.030" gap might require 12K volts to produce a spark. So, a
    larger gap produces a 'hotter' spark, up to the theoretical limit of
    the coil, and a hotter spark is better, no? Well, yes and no;
    theoretically, as long as the spark is hot enough to jump the gap it
    will ignite a proper mixture. A very lean mixture is harder to
    ignite, and a very rich mixture could 'drown' the spark ('stratified
    charge' engines use a richer mixture to ignite a leaner mixture). A
    hotter spark may more reliably ignite a non-ideal mixture, and may
    help a bit to ignite a proper one (higher compression engines
    require a hotter spark). But, as Josef noted, since every spark
    transmits some of the non-ground electrode--probably billions of
    atoms--to the ground electrode a hotter spark will erode the
    electrode faster (since erosion starts with the first spark and with
    a wider gap you should re-gap more often). Note condensers
    (capacitors) are used in points systems and SU fuel pumps to
    suppress spark arcing and subsequent points erosion. Which is why
    ...<br>
    <br>
    Exotic metal--platinum or iridium--plugs are more resistant to
    erosion, which is why newer cars can go 80K miles or more without a
    'tuneup,' which, for all intents-and-purposes just means swapping
    plugs (note they come in 'single' (default) or 'dual' types, meaning
    one or both electrodes are the exotic metal, respectively) .
    Old-style plugs with copper and steel electrodes can reliably go 15K
    miles or more, with one or two re-gaps, so exotic metal plugs aren't
    particularly useful for our cars which might do a couple thousand
    miles a year but, hey, knock yourself out. Note that platinum and
    iridium plugs come pre-gapped, and you'd best not mess with them.
    When I swapped plugs on my '08 Mustang I couldn't find a gap spec
    anywhere, but IIRC I futzed with them anyway (of course) and think
    they were all about 0.025". Fortunately, the car still ran well
    after my meddling and I traded it in in a few years anyway.
    Curiously, I watched a David Vizard video where he claimed he saw a
    <i>slight</i> mileage increase using E3 'DiamondFire' plugs, so
    there may be something to the plug voodoo. Fun fact: All the iridium
    on planet Earth came from a single asteroid, and is found in a layer
    of said earth deposited around the same time the dinosaurs went
    kaput. Coincidence? I think not.<br>
    <br>
    Anybody who's worked on 'modern' cars, say, newer than 2000MY or so,
    has noted 'Coil On Plug' ('COP') technology, where each plug get its
    own coil. Now, the coils on these are small, about the size of an
    old 35mm film canister--remember those?--and you might say to
    yourself 'Self, how do they stuff all that wiring into that little
    film canister' and the answer is, the wires gotta be real tiny and,
    yep, as you might expect they are fragile compared to our Bud Light
    can-sized (sorry) old school Lucas coils. Early COP systems--looking
    at you, VW--were prone to gremlins and I still hear about COP
    failures on newer cars and other makes, esp. with DOHC engines which
    always, eventually, seem to get leaky valve cover gaskets which dump
    oil into the plug tubes (as opposed to leaky Healey valve cover
    gaskets which just dump oil, well, everywhere).<br>
    <br>
    OK, caffeine rush is fading. Ciao.<br>
    <br>
    Bob<br>
    <br>
    * Note coils for our Healeys come with either 'SW' ('switch;' i.e.
    ignition switch)  and 'CB' ('contact breaker;' i.e.
    points/distributor)  or '+' and '-' labels on the primary terminals.
    They'll work either way, but some voodoo is employed whereby, when
    properly connected the secondary field is routed in series with the
    primary circuit to give a slight boost to produced spark.<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 5/4/2023 4:43 AM, josef-eckert---
      via Healeys wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title></title>
      <p style="margin: 0px;"><span
style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Sorry,
          I am out here. This guy wants to play till the engine is shot.<br>
        </span></p>
      <p style="margin: 0px;"><span
style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"> </span></p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;">-----Original-Nachricht-----</p>
      <p style="margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
      <p style="margin: 0px;">Datum: 2023-05-04T12:45:37+0200</p>
      <p style="margin: 0px;">Von: <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">"[email-masked]"</a>
        <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a></p>
      <p style="margin: 0px;">An: <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">"[email-masked]"</a>
        <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a></p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <div style="position: relative; color: #000000; font: 12px
        Arial,Helvetica,sans-serif;">
        <div class="WordSection1">
          <p class="MsoNormal"><span style="mso-fareast-language:
              EN-US;">Thanks for that. I’ll certainly bear it in mind.
              Likewise, I’ll keep a close eye on my engine’s
              temperature. The latter is quite well protected with a
              modern rad, all the correct baffles, 5 blade fan plus
              electronic fan. But, as I said, I’ll keep an eye on it.</span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:
              EN-US;">Someone mentioned that he used “Iridium” plugs
              from NGK. I googled them….horribly expensive. Can they be
              worth it in our old cars?</span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:
              EN-US;">Simon</span></p>
          <p class="MsoNormal"><span style="mso-fareast-language:
              EN-US;"> </span></p>
          <div>
            <div style="border: none; border-top: solid #E1E1E1 1.0pt;
              padding: 3.0pt 0cm 0cm 0cm;">
              <p class="MsoNormal"><strong><span lang="EN-US">From:</span></strong><span
                  lang="EN-US"> <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>
                  <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a> <br>
                  <strong>Sent:</strong> 04 May 2023 07:06<br>
                  <strong>To:</strong>
                  <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>; Healey, Forum
                  <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a><br>
                  <strong>Subject:</strong> AW: [Healeys] Spark plug gap</span></p>
            </div>
          </div>
          <p class="MsoNormal"> </p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;">For me, i
              prefer Champion plugs plugs to NGK, but that´s a matter of
              taste. I think both, Champion and NGK, are of similar
              quality. Matter of taste, as I wrote. But NOT the car
              manufacturer determines the plug gap, its the plug
              manufacturer. Definitely the car manufacturer takes this
              for his specs in the workshop manual.</span></p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;">There is
              to much hype about plugs anyway. I am working as a
              professional, Elecrtonics and Elecrtrcian engineer, at a
              big classic car parts supplier here in Europe and I never
              go away from the given plug gap as set by the plug
              manufacturer. Austin-Healey engines  are not high tech,
              they are tractor engines and can take a lot of misfit, but
              anyway BMC knew at the time what´s best to do with them,
              even its printed 60 or 70 years ago.</span></p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;">Some
              people try to adjust the fuel mixture with a CO-tester.
              You can do that, but it doesn´t give best results for road
              use, especially in hotter climates and high above sea
              level. </span></p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;">When you
              are very good in engine engineering and have all the tools
              you can try to find some more horsepower in your engine,
              but you always pay that with some more heat produced,
              which is not at all good for our old BMC engines.</span></p>
          <p style="margin: 0px;"> </p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;">Josef</span></p>
          <p style="margin: 0px;"><span style="font-size: 10.0pt;
              font-family: 'Arial',sans-serif; color: black;"> </span></p>
          <p style="margin: 0px;"> </p>
          <p style="margin: 0px;"> </p>
          <p style="margin: 0px;">-----Original-Nachricht-----</p>
          <p style="margin: 0px;">Betreff: RE: [Healeys] Spark plug gap</p>
          <p style="margin: 0px;">Datum: 2023-05-04T00:06:58+0200</p>
          <p style="margin: 0px;">Von: "<a
              href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>"
            &lt;<a href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;</p>
          <p style="margin: 0px;">An: "<a
              href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>"
            &lt;<a href="mailto:[email-masked]"
              moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;</p>
          <p style="margin: 0px;"> </p>
          <p style="margin: 0px;"> </p>
          <p style="margin: 0px;"> </p>
          <div>
            <div>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;">You may be right. Not
                  sure. </span></p>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;">Actually I thought that
                  the gap was determined by the car’s manufacturer ie
                  one could expect to find the same plug in two
                  different cars and to find that the recommended gap
                  was not the same for each car.</span></p>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;">Likewise, the BMC manual
                  suggests Champion plugs at 0.024” to 0.026” and that
                  was some 60+ years ago. I’ve always been told that
                  Champion plugs aren’t the best in the world and I’m
                  sure that a modern NGK can stand a little more heat
                  than the Champions that were around 60 years ago.</span></p>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;">Anyhow, I’ll keep an eye
                  on them. I’m a pretty tame driver so there won’t be
                  undue stress under the bonnet.</span></p>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;">Simon</span></p>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;
                  mso-fareast-language: EN-US;"> </span></p>
              <div>
                <div style="border: none; border-top: solid #E1E1E1
                  1.0pt; padding: 3.0pt 0cm 0cm 0cm;">
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><strong><span
                        style="font-size: 9.0pt; font-family:
                        'Arial',sans-serif; color: black;" lang="EN-US">From:</span></strong><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;" lang="EN-US"> <a
                        href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>
                      &lt;<a href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>&gt;
                      <br>
                      <strong><span style="font-family:
                          'Arial',sans-serif;">Sent:</span></strong> 03
                      May 2023 20:56<br>
                      <strong><span style="font-family:
                          'Arial',sans-serif;">To:</span></strong> <a
                        href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>;
                      <a href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a><br>
                      <strong><span style="font-family:
                          'Arial',sans-serif;">Subject:</span></strong>
                      AW: [Healeys] Spark plug gap</span></p>
                </div>
              </div>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Spark
                  plugs are designed and tested to be used with the gap
                  given by the producer of the spark plug.</span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;">When
                  you widen the gap the plug gets hotter as it is
                  designed for and the electrode can melt or wear very
                  fast.</span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Its a
                  very short win you gain modifying them.</span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;">I
                  never understand why people think they are better
                  engineers and know better than the designers of the
                  system they use.</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Josef
                </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 10.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;">-----Original-Nachricht-----</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Betreff:
                  [Healeys] Spark plug gap</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Datum:
                  2023-05-03T21:39:57+0200</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;">Von:
                  "Simon Lachlan via Healeys" &lt;<a
                    href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;">An:
                  "'Healeys'" &lt;<a
                    href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;</span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <p style="margin: 0px;"><span style="font-size: 9.0pt;
                  font-family: 'Arial',sans-serif; color: black;"> </span></p>
              <div>
                <div>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">I run my MkII
                      BT7 on NGK BP6ES which were recommended by some of
                      the wise ones on this list.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">The car has a
                      “Sports” coil and a 123Ignition distributor. DW
                      fast road cam…etc</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">Now, talking of
                      “recommended”, the rolling road guys told me to
                      set the plugs at 0.028” and pooh-poohed anything
                      bigger when I suggested that I’d heard of much
                      greater gaps with my approximate setup.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">So, I went with
                      0.028.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">The other day,
                      I decided to experiment and set my spare set at
                      0.032”. Same NGKs, no mileage on them..decent
                      plugs. Anyhow, it made a very surprising
                      difference. All round performance is much
                      enhanced.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">Despite it’s
                      3:54 diff and 28% OD, it was never sluggish on our
                      local hills. But now it fairly zooms up them.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">To be frank,
                      all a bit of a surprise.</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">Not
                      boasting…just putting that out there in case
                      anyone else is thinking of going up a few thou…..</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">When I asked
                      about gaps a few years back, some of the
                      suggestions were near 0.040”. Surely that a bit
                      much?</span></p>
                  <p class="MsoNormal" style="mso-margin-top-alt: auto;
                    mso-margin-bottom-alt: auto;"><span
                      style="font-size: 9.0pt; font-family:
                      'Arial',sans-serif; color: black;">Simon</span></p>
                </div>
              </div>
              <p class="MsoNormal" style="mso-margin-top-alt: auto;
                mso-margin-bottom-alt: auto;"><span style="font-size:
                  9.0pt; font-family: 'Arial',sans-serif; color: black;"> </span></p>
            </div>
          </div>
          <p class="MsoNormal"> </p>
        </div>
      </div>
      
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________

Archive: <a class="moz-txt-link-freetext" href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a class="moz-txt-link-freetext" href="http://autox.team.net/archive/healeys">http://autox.team.net/archive/healeys</a>

<a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a>
<a class="moz-txt-link-freetext" href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a>

</pre>
    </blockquote>
    <br>
  </body>
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[email-masked]

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---

From: josef-eckert--- via Healeys <[email-masked]>
Date: Thu, 4 May 2023 21:58:21 +0200 (CEST)

--===============2185253023934868941==
	boundary="----=_Part_226027_1884741458.1683230301902"

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Richard,
Just do what you want. Its your car, your engine, I do not mind.
=20
Josef
=20
=20
=20
-----Original-Nachricht-----
Betreff: Re: [Healeys] Spark plug gap
Datum: 2023-05-04T16:10:56+0200
Von: "Ricchardd Mayor" <[email-masked]>
An: "[email-masked]" <[email-masked]>
=20
=20
=20
On no!  Who knew that gapping your plugs at .032 would ruin your engine.=20
Thank you Josef for saving us. =20
=20
Richard Mayor

    On May 4, 2023, at 4:43 AM, josef-eckert--- via Healeys <

    -----Original-Nachricht-----
    Betreff: RE: [Healeys] Spark plug gap
    Datum: 2023-05-04T12:45:37+0200
    Von: "[email-masked]
    [email-masked]
    =20
    =20
    =20

    Simon

    =20

    Sent: 04 May 2023 07:06

    =20
    -----Original-Nachricht-----
    Betreff: RE: [Healeys] Spark plug gap
    Datum: 2023-05-04T00:06:58+0200
    Von: "[email-masked]
    [email-masked]
    =20
    =20
    =20

    Simon

    =20

    Sent: 03 May 2023 20:56

    =20
    -----Original-Nachricht-----
    Betreff: [Healeys] Spark plug gap
    Datum: 2023-05-03T21:39:57+0200
    Von: "Simon Lachlan via Healeys" <[email-masked]
=20
    =20
    =20
    =20

    So, I went with 0.028.

    Simon

    =20
    =20
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; charset=
=3DUTF-8"/><title></title></head><body><p style=3D"margin: 0px;"><span styl=
e=3D"font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;te=
xt-decoration:none">Richard,<br />Just do what you want. Its your car, your=
 engine, I do not mind.<br /></span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">Josef</span></p>
<p style=3D"margin: 0px;"><span style=3D"font-family:arial,helvetica,sans-s=
erif;font-size:10pt;color:#000000;text-decoration:none">&nbsp;</span></p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">-----Original-Nachricht-----</p>
<p style=3D"margin: 0px;">Betreff: Re: [Healeys] Spark plug gap</p>
<p style=3D"margin: 0px;">Datum: 2023-05-04T16:10:56+0200</p>
<p style=3D"margin: 0px;">Von: "Ricchardd Mayor" &lt;[email-masked]&=
gt;</p>
<p style=3D"margin: 0px;">An: "[email-masked]" &lt;josef-eckert@t=
-online.de&gt;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<p style=3D"margin: 0px;">&nbsp;</p>
<div style=3D"position: relative; color: #000000; font: 12px Arial,Helvetic=
a,sans-serif;">On no! &nbsp;Who knew that gapping your plugs at .032 would =
ruin your engine. Thank you Josef for saving us. &nbsp;
<div class=3D"">&nbsp;</div>
<div class=3D"">Richard&nbsp;Mayor
<div class=3D""><a class=3D"" href=3D"mailto:[email-masked]">boyrace=
[email-masked]</a><br class=3D"" /><br class=3D"" /></div>
<br class=3D"" />
<div>
<blockquote class=3D"">
<div class=3D"">On May 4, 2023, at 4:43 AM, josef-eckert--- via Healeys &lt=
;<a class=3D"" href=3D"mailto:[email-masked]">[email-masked]=
t</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline" />
<div class=3D"">
<div class=3D"">
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-famil=
y: arial, helvetica, sans-serif; font-size: 10pt; text-decoration: none;">S=
orry, I am out here. This guy wants to play till the engine is shot.<br cla=
ss=3D"" /></span></div>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-family:=
 arial, helvetica, sans-serif; font-size: 10pt; text-decoration: none;">&nb=
sp;</span></p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<div class=3D"" style=3D"margin: 0px;">-----Original-Nachricht-----</div>
<div class=3D"" style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug ga=
p</div>
<div class=3D"" style=3D"margin: 0px;">Datum: 2023-05-04T12:45:37+0200</div=
<div class=3D"" style=3D"margin: 0px;">Von: "<a class=3D"" href=3D"mailto:s=
[email-masked]">[email-masked]</a>" &l=
t;<a class=3D"" href=3D"mailto:[email-masked]">simon.lac=
[email-masked]</a>&gt;</div>
<div class=3D"" style=3D"margin: 0px;">An: "<a class=3D"" href=3D"mailto:jo=
[email-masked]">[email-masked]</a>" &lt;<a class=3D"" hre=
f=3D"mailto:[email-masked]">[email-masked]</a>&gt;</div=
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<div class=3D"" style=3D"position: relative; font-style: normal; font-varia=
nt: normal; font-weight: normal; font-size: 12px; line-height: normal; font=
-family: Arial, Helvetica, sans-serif;">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span class=3D"" style=3D"mso-fareast-language: EN-U=
S;">Thanks for that. I&rsquo;ll certainly bear it in mind. Likewise, I&rsqu=
o;ll keep a close eye on my engine&rsquo;s temperature. The latter is quite=
 well protected with a modern rad, all the correct baffles, 5 blade fan plu=
s electronic fan. But, as I said, I&rsquo;ll keep an eye on it.</span></p>
<p class=3D"MsoNormal"><span class=3D"" style=3D"mso-fareast-language: EN-U=
S;">Someone mentioned that he used &ldquo;Iridium&rdquo; plugs from NGK. I =
googled them&hellip;.horribly expensive. Can they be worth it in our old ca=
rs?</span></p>
<p class=3D"MsoNormal"><span class=3D"" style=3D"mso-fareast-language: EN-U=
S;">Simon</span></p>
<div class=3D""><span class=3D"" style=3D"mso-fareast-language: EN-US;">&nb=
sp;</span></div>
<div class=3D"">
<div class=3D"" style=3D"border: none; border-top: solid #E1E1E1 1.0pt; pad=
ding: 3.0pt 0cm 0cm 0cm;">
<p class=3D"MsoNormal"><strong class=3D""><span class=3D"" lang=3D"EN-US">F=
rom:</span></strong><span class=3D"" lang=3D"EN-US"> <a class=3D"" href=3D"=
mailto:[email-masked]">[email-masked]</a> &lt;<a class=
=3D"" href=3D"mailto:[email-masked]">[email-masked]</a>=
&gt; <br class=3D"" /><strong class=3D"">Sent:</strong> 04 May 2023 07:06<b=
r class=3D"" /><strong class=3D"">To:</strong> <a class=3D"" href=3D"mailto=
:[email-masked]">[email-masked]</a>; =
Healey, Forum &lt;<a class=3D"" href=3D"mailto:[email-masked]">heal=
[email-masked]</a>&gt;<br class=3D"" /><strong class=3D"">Subject:</str=
ong> AW: [Healeys] Spark plug gap</span></p>
</div>
</div>
<div class=3D"">&nbsp;</div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">For me, i prefer Champion plugs plu=
gs to NGK, but that&acute;s a matter of taste. I think both, Champion and N=
GK, are of similar quality. Matter of taste, as I wrote. But NOT the car ma=
nufacturer determines the plug gap, its the plug manufacturer. Definitely t=
he car manufacturer takes this for his specs in the workshop manual.</span>=
</div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">There is to much hype about plugs a=
nyway. I am working as a professional, Elecrtonics and Elecrtrcian engineer=
, at a big classic car parts supplier here in Europe and I never go away fr=
om the given plug gap as set by the plug manufacturer. Austin-Healey engine=
s&nbsp; are not high tech, they are tractor engines and can take a lot of m=
isfit, but anyway BMC knew at the time what&acute;s best to do with them, e=
ven its printed 60 or 70 years ago.</span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">Some people try to adjust the fuel =
mixture with a CO-tester. You can do that, but it doesn&acute;t give best r=
esults for road use, especially in hotter climates and high above sea level=
. </span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">When you are very good in engine en=
gineering and have all the tools you can try to find some more horsepower i=
n your engine, but you always pay that with some more heat produced, which =
is not at all good for our old BMC engines.</span></div>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">Josef</span></div>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 1=
0pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<div class=3D"" style=3D"margin: 0px;">-----Original-Nachricht-----</div>
<div class=3D"" style=3D"margin: 0px;">Betreff: RE: [Healeys] Spark plug ga=
p</div>
<div class=3D"" style=3D"margin: 0px;">Datum: 2023-05-04T00:06:58+0200</div=
<div class=3D"" style=3D"margin: 0px;">Von: "<a class=3D"" href=3D"mailto:s=
[email-masked]">[email-masked]</a>" &l=
t;<a class=3D"" href=3D"mailto:[email-masked]">simon.lac=
[email-masked]</a>&gt;</div>
<div class=3D"" style=3D"margin: 0px;">An: "<a class=3D"" href=3D"mailto:jo=
[email-masked]">[email-masked]</a>" &lt;<a class=3D"" hre=
f=3D"mailto:[email-masked]">[email-masked]</a>&gt;</div=
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<p class=3D"" style=3D"margin: 0px;">&nbsp;</p>
<div class=3D"">
<div class=3D"">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">You may be right. Not sure. </span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Actually I thought that the gap was determined by the car&rsqu=
o;s manufacturer ie one could expect to find the same plug in two different=
 cars and to find that the recommended gap was not the same for each car.</=
span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Likewise, the BMC manual suggests Champion plugs at 0.024&rdqu=
o; to 0.026&rdquo; and that was some 60+ years ago. I&rsquo;ve always been =
told that Champion plugs aren&rsquo;t the best in the world and I&rsquo;m s=
ure that a modern NGK can stand a little more heat than the Champions that =
were around 60 years ago.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Anyhow, I&rsquo;ll keep an eye on them. I&rsquo;m a pretty tam=
e driver so there won&rsquo;t be undue stress under the bonnet.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Simon</span></p>
<div class=3D""><span class=3D"" style=3D"font-size: 9pt; font-family: Aria=
l, sans-serif;">&nbsp;</span></div>
<div class=3D"">
<div class=3D"" style=3D"border: none; border-top: solid #E1E1E1 1.0pt; pad=
ding: 3.0pt 0cm 0cm 0cm;">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><strong class=3D""><span class=3D"" lang=3D"EN-US" style=3D"fo=
nt-size: 9pt; font-family: Arial, sans-serif;">From:</span></strong><span c=
lass=3D"" lang=3D"EN-US" style=3D"font-size: 9pt; font-family: Arial, sans-=
serif;"> <a class=3D"" href=3D"mailto:[email-masked]">josef-ecker=
[email-masked]</a> &lt;<a class=3D"" href=3D"mailto:[email-masked]=
">[email-masked]</a>&gt; <br class=3D"" /><strong class=3D""><spa=
n class=3D"" style=3D"font-family: 'Arial',sans-serif;">Sent:</span></stron=
g> 03 May 2023 20:56<br class=3D"" /><strong class=3D""><span class=3D"" st=
yle=3D"font-family: 'Arial',sans-serif;">To:</span></strong> <a class=3D"" =
href=3D"mailto:[email-masked]">simon.lachlan@alexarevel.=
plus.com</a>; <a class=3D"" href=3D"mailto:[email-masked]">healeys@=
autox.team.net</a><br class=3D"" /><strong class=3D""><span class=3D"" styl=
e=3D"font-family: 'Arial',sans-serif;">Subject:</span></strong> AW: [Healey=
s] Spark plug gap</span></p>
</div>
</div>
<div class=3D""><span class=3D"" style=3D"font-size: 9pt; font-family: Aria=
l, sans-serif;">&nbsp;</span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">Spark plugs are designed and tested=
 to be used with the gap given by the producer of the spark plug.</span></d=
iv>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">When you widen the gap the plug get=
s hotter as it is designed for and the electrode can melt or wear very fast=
.</span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">Its a very short win you gain modif=
ying them.</span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">I never understand why people think=
 they are better engineers and know better than the designers of the system=
 they use.</span></div>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 10pt; font-family: Arial, sans-serif;">Josef </span></div>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 1=
0pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 9pt; font-family: Arial, sans-serif;">-----Original-Nachricht-----</span><=
/div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 9pt; font-family: Arial, sans-serif;">Betreff: [Healeys] Spark plug gap</s=
pan></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 9pt; font-family: Arial, sans-serif;">Datum: 2023-05-03T21:39:57+0200</spa=
n></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 9pt; font-family: Arial, sans-serif;">Von: "Simon Lachlan via Healeys" &lt=
;<a class=3D"" href=3D"mailto:[email-masked]">[email-masked]=
t</a>&gt;</span></div>
<div class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size:=
 9pt; font-family: Arial, sans-serif;">An: "'Healeys'" &lt;<a class=3D"" hr=
ef=3D"mailto:[email-masked]">[email-masked]</a>&gt;</span><=
/div>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<p class=3D"" style=3D"margin: 0px;"><span class=3D"" style=3D"font-size: 9=
pt; font-family: Arial, sans-serif;">&nbsp;</span></p>
<div class=3D"">
<div class=3D"">
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">I run my MkII BT7 on NGK BP6ES which were recommended by some =
of the wise ones on this list.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">The car has a &ldquo;Sports&rdquo; coil and a 123Ignition dist=
ributor. DW fast road cam&hellip;etc</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Now, talking of &ldquo;recommended&rdquo;, the rolling road gu=
ys told me to set the plugs at 0.028&rdquo; and pooh-poohed anything bigger=
 when I suggested that I&rsquo;d heard of much greater gaps with my approxi=
mate setup.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">So, I went with 0.028.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">The other day, I decided to experiment and set my spare set at=
 0.032&rdquo;. Same NGKs, no mileage on them..decent plugs. Anyhow, it made=
 a very surprising difference. All round performance is much enhanced.</spa=
n></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Despite it&rsquo;s 3:54 diff and 28% OD, it was never sluggish=
 on our local hills. But now it fairly zooms up them.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">To be frank, all a bit of a surprise.</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Not boasting&hellip;just putting that out there in case anyone=
 else is thinking of going up a few thou&hellip;..</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">When I asked about gaps a few years back, some of the suggesti=
ons were near 0.040&rdquo;. Surely that a bit much?</span></p>
<p class=3D"MsoNormal" style=3D"mso-margin-top-alt: auto; mso-margin-bottom=
-alt: auto;"><span class=3D"" style=3D"font-size: 9pt; font-family: Arial, =
sans-serif;">Simon</span></p>
</div>
</div>
<div class=3D""><span class=3D"" style=3D"font-size: 9pt; font-family: Aria=
l, sans-serif;">&nbsp;</span></div>
</div>
</div>
<div class=3D"">&nbsp;</div>
</div>
</div>
</div>
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</blockquote>
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</div>=EF=BB=BF</body></html>
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[email-masked]

--===============2185253023934868941==--

---

From: Kees Oudesluijs via Healeys <[email-masked]>
Date: Fri, 5 May 2023 11:28:39 +0200

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In extreme cases you may burn a hole in your pistons.
Kees

Op 4-5-2023 om 21:58 schreef josef-eckert--- via Healeys:
> On no!  Who knew that gapping your plugs at .032 would ruin your 
> engine. Thank you Josef for saving us.
> Richard Mayor
> [email-masked]
>
>
>     On May 4, 2023, at 4:43 AM, josef-eckert--- via Healeys
>     Thanks for that. I’ll certainly bear it in mind. Likewise, I’ll
>     keep a close eye on my engine’s temperature. The latter is quite
>     well protected with a modern rad, all the correct baffles, 5 blade
>     fan plus electronic fan. But, as I said, I’ll keep an eye on it.
>
>     For me, i prefer Champion plugs plugs to NGK, but that´s a matter
>     of taste. I think both, Champion and NGK, are of similar quality.
>     Matter of taste, as I wrote. But NOT the car manufacturer
>     determines the plug gap, its the plug manufacturer. Definitely the
>     car manufacturer takes this for his specs in the workshop manual.
>     professional, Elecrtonics and Elecrtrcian engineer, at a big
>     classic car parts supplier here in Europe and I never go away from
>     the given plug gap as set by the plug manufacturer. Austin-Healey
>     engines  are not high tech, they are tractor engines and can take
>     a lot of misfit, but anyway BMC knew at the time what´s best to do
>     with them, even its printed 60 or 70 years ago.
>     Some people try to adjust the fuel mixture with a CO-tester. You
>     can do that, but it doesn´t give best results for road use,
>     especially in hotter climates and high above sea level.
>     When you are very good in engine engineering and have all the
>     tools you can try to find some more horsepower in your engine, but
>     you always pay that with some more heat produced, which is not at
>     all good for our old BMC engines.
>
>     Josef
>
>     different cars and to find that the recommended gap was not the
>     same for each car.
>
>     Likewise, the BMC manual suggests Champion plugs at 0.024” to
>     0.026” and that was some 60+ years ago. I’ve always been told that
>     Champion plugs aren’t the best in the world and I’m sure that a
>     modern NGK can stand a little more heat than the Champions that
>     were around 60 years ago.
>
>     Anyhow, I’ll keep an eye on them. I’m a pretty tame driver so
>     there won’t be undue stress under the bonnet.
>
>     Simon
>
>     Spark plugs are designed and tested to be used with the gap given
>     by the producer of the spark plug.
>     When you widen the gap the plug gets hotter as it is designed for
>     and the electrode can melt or wear very fast.
>     I never understand why people think they are better engineers and
>     know better than the designers of the system they use.
>
>     Josef
>
>     I run my MkII BT7 on NGK BP6ES which were recommended by some of
>     the wise ones on this list.
>
>     Now, talking of “recommended”, the rolling road guys told me to
>     set the plugs at 0.028” and pooh-poohed anything bigger when I
>     suggested that I’d heard of much greater gaps with my approximate
>     setup.
>
>     So, I went with 0.028.
>
>     The other day, I decided to experiment and set my spare set at
>     0.032”. Same NGKs, no mileage on them..decent plugs. Anyhow, it
>     made a very surprising difference. All round performance is much
>     enhanced.
>
>     Despite it’s 3:54 diff and 28% OD, it was never sluggish on our
>     local hills. But now it fairly zooms up them.
>
>     When I asked about gaps a few years back, some of the suggestions
>     were near 0.040”. Surely that a bit much?
>
>     Simon
>
>     Support Team.Net <http://Team.Net> http://www.team.net/donate.html
> Unsubscribe/Manage:http://autox.team.net/mailman/options/healeys/[email-masked]
>

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    <p>In extreme cases you may burn a hole in your pistons.<br>
      Kees</p>
    <p><br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">Op 4-5-2023 om 21:58 schreef
      josef-eckert--- via Healeys:<br>
    </div>
    <blockquote type="cite"
cite="mid:[email-masked]">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title></title>
      <p style="margin: 0px;"><span
style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Richard,<br>
          Just do what you want. Its your car, your engine, I do not
          mind.<br>
        </span></p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"><span
style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Josef</span></p>
      <p style="margin: 0px;"><span
style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"> </span></p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;">-----Original-Nachricht-----</p>
      <p style="margin: 0px;">Betreff: Re: [Healeys] Spark plug gap</p>
      <p style="margin: 0px;">Datum: 2023-05-04T16:10:56+0200</p>
      <p style="margin: 0px;">Von: "Ricchardd Mayor"
        <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a></p>
      <p style="margin: 0px;">An: <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">"[email-masked]"</a>
        <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a></p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <p style="margin: 0px;"> </p>
      <div style="position: relative; color: #000000; font: 12px
        Arial,Helvetica,sans-serif;">On no!  Who knew that gapping your
        plugs at .032 would ruin your engine. Thank you Josef for saving
        us.  
        <div class=""> </div>
        <div class="">Richard Mayor
          <div class=""><a class="moz-txt-link-freetext"
              href="mailto:[email-masked]" moz-do-not-send="true">[email-masked]</a><br
              class="">
            <br class="">
          </div>
          <br class="">
          <div>
            <blockquote class="">
              <div class="">On May 4, 2023, at 4:43 AM, josef-eckert---
                via Healeys &lt;<a class="moz-txt-link-freetext"
                  href="mailto:[email-masked]"
                  moz-do-not-send="true">[email-masked]</a>&gt;
                wrote:</div>
              <br class="Apple-interchange-newline">
              <div class="">
                <div class="">
                  <div class="" style="margin: 0px;"><span class=""
                      style="font-family: arial, helvetica, sans-serif;
                      font-size: 10pt; text-decoration: none;">Sorry, I
                      am out here. This guy wants to play till the
                      engine is shot.<br class="">
                    </span></div>
                  <p class="" style="margin: 0px;"><span class=""
                      style="font-family: arial, helvetica, sans-serif;
                      font-size: 10pt; text-decoration: none;"> </span></p>
                  <p class="" style="margin: 0px;"> </p>
                  <p class="" style="margin: 0px;"> </p>
                  <div class="" style="margin: 0px;">-----Original-Nachricht-----</div>
                  <div class="" style="margin: 0px;">Betreff: RE:
                    [Healeys] Spark plug gap</div>
                  <div class="" style="margin: 0px;">Datum:
                    2023-05-04T12:45:37+0200</div>
                  <div class="" style="margin: 0px;">Von: "<a
                      class="moz-txt-link-freetext"
                      href="mailto:[email-masked]"
                      moz-do-not-send="true">[email-masked]</a>"
                    &lt;<a class="moz-txt-link-freetext"
                      href="mailto:[email-masked]"
                      moz-do-not-send="true">[email-masked]</a>&gt;</div>
                  <div class="" style="margin: 0px;">An: "<a
                      class="moz-txt-link-freetext"
                      href="mailto:[email-masked]"
                      moz-do-not-send="true">[email-masked]</a>"
                    &lt;<a class="moz-txt-link-freetext"
                      href="mailto:[email-masked]"
                      moz-do-not-send="true">[email-masked]</a>&gt;</div>
                  <p class="" style="margin: 0px;"> </p>
                  <p class="" style="margin: 0px;"> </p>
                  <p class="" style="margin: 0px;"> </p>
                  <div class="" style="position: relative; font-style:
                    normal; font-variant: normal; font-weight: normal;
                    font-size: 12px; line-height: normal; font-family:
                    Arial, Helvetica, sans-serif;">
                    <div class="WordSection1">
                      <p class="MsoNormal"><span class=""
                          style="mso-fareast-language: EN-US;">Thanks
                          for that. I’ll certainly bear it in mind.
                          Likewise, I’ll keep a close eye on my engine’s
                          temperature. The latter is quite well
                          protected with a modern rad, all the correct
                          baffles, 5 blade fan plus electronic fan. But,
                          as I said, I’ll keep an eye on it.</span></p>
                      <p class="MsoNormal"><span class=""
                          style="mso-fareast-language: EN-US;">Someone
                          mentioned that he used “Iridium” plugs from
                          NGK. I googled them….horribly expensive. Can
                          they be worth it in our old cars?</span></p>
                      <p class="MsoNormal"><span class=""
                          style="mso-fareast-language: EN-US;">Simon</span></p>
                      <div class=""><span class=""
                          style="mso-fareast-language: EN-US;"> </span></div>
                      <div class="">
                        <div class="" style="border: none; border-top:
                          solid #E1E1E1 1.0pt; padding: 3.0pt 0cm 0cm
                          0cm;">
                          <p class="MsoNormal"><strong class=""><span
                                class="" lang="EN-US">From:</span></strong><span
                              class="" lang="EN-US"> <a
                                class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>
                              &lt;<a class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>&gt;
                              <br class="">
                              <strong class="">Sent:</strong> 04 May
                              2023 07:06<br class="">
                              <strong class="">To:</strong> <a
                                class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>;
                              Healey, Forum &lt;<a
                                class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>&gt;<br
                                class="">
                              <strong class="">Subject:</strong> AW:
                              [Healeys] Spark plug gap</span></p>
                        </div>
                      </div>
                      <div class=""> </div>
                      <div class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;">For me, i prefer Champion plugs
                          plugs to NGK, but that´s a matter of taste. I
                          think both, Champion and NGK, are of similar
                          quality. Matter of taste, as I wrote. But NOT
                          the car manufacturer determines the plug gap,
                          its the plug manufacturer. Definitely the car
                          manufacturer takes this for his specs in the
                          workshop manual.</span></div>
                      <div class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;">There is to much hype about plugs
                          anyway. I am working as a professional,
                          Elecrtonics and Elecrtrcian engineer, at a big
                          classic car parts supplier here in Europe and
                          I never go away from the given plug gap as set
                          by the plug manufacturer. Austin-Healey
                          engines  are not high tech, they are tractor
                          engines and can take a lot of misfit, but
                          anyway BMC knew at the time what´s best to do
                          with them, even its printed 60 or 70 years
                          ago.</span></div>
                      <div class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;">Some people try to adjust the
                          fuel mixture with a CO-tester. You can do
                          that, but it doesn´t give best results for
                          road use, especially in hotter climates and
                          high above sea level. </span></div>
                      <div class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;">When you are very good in engine
                          engineering and have all the tools you can try
                          to find some more horsepower in your engine,
                          but you always pay that with some more heat
                          produced, which is not at all good for our old
                          BMC engines.</span></div>
                      <p class="" style="margin: 0px;"> </p>
                      <div class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;">Josef</span></div>
                      <p class="" style="margin: 0px;"><span class=""
                          style="font-size: 10pt; font-family: Arial,
                          sans-serif;"> </span></p>
                      <p class="" style="margin: 0px;"> </p>
                      <p class="" style="margin: 0px;"> </p>
                      <div class="" style="margin: 0px;">-----Original-Nachricht-----</div>
                      <div class="" style="margin: 0px;">Betreff: RE:
                        [Healeys] Spark plug gap</div>
                      <div class="" style="margin: 0px;">Datum:
                        2023-05-04T00:06:58+0200</div>
                      <div class="" style="margin: 0px;">Von: "<a
                          class="moz-txt-link-freetext"
                          href="mailto:[email-masked]"
                          moz-do-not-send="true">[email-masked]</a>"
                        &lt;<a class="moz-txt-link-freetext"
                          href="mailto:[email-masked]"
                          moz-do-not-send="true">[email-masked]</a>&gt;</div>
                      <div class="" style="margin: 0px;">An: "<a
                          class="moz-txt-link-freetext"
                          href="mailto:[email-masked]"
                          moz-do-not-send="true">[email-masked]</a>"
                        &lt;<a class="moz-txt-link-freetext"
                          href="mailto:[email-masked]"
                          moz-do-not-send="true">[email-masked]</a>&gt;</div>
                      <p class="" style="margin: 0px;"> </p>
                      <p class="" style="margin: 0px;"> </p>
                      <p class="" style="margin: 0px;"> </p>
                      <div class="">
                        <div class="">
                          <p class="MsoNormal"
                            style="mso-margin-top-alt: auto;
                            mso-margin-bottom-alt: auto;"><span class=""
                              style="font-size: 9pt; font-family: Arial,
                              sans-serif;">You may be right. Not sure. </span></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt: auto;
                            mso-margin-bottom-alt: auto;"><span class=""
                              style="font-size: 9pt; font-family: Arial,
                              sans-serif;">Actually I thought that the
                              gap was determined by the car’s
                              manufacturer ie one could expect to find
                              the same plug in two different cars and to
                              find that the recommended gap was not the
                              same for each car.</span></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt: auto;
                            mso-margin-bottom-alt: auto;"><span class=""
                              style="font-size: 9pt; font-family: Arial,
                              sans-serif;">Likewise, the BMC manual
                              suggests Champion plugs at 0.024” to
                              0.026” and that was some 60+ years ago.
                              I’ve always been told that Champion plugs
                              aren’t the best in the world and I’m sure
                              that a modern NGK can stand a little more
                              heat than the Champions that were around
                              60 years ago.</span></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt: auto;
                            mso-margin-bottom-alt: auto;"><span class=""
                              style="font-size: 9pt; font-family: Arial,
                              sans-serif;">Anyhow, I’ll keep an eye on
                              them. I’m a pretty tame driver so there
                              won’t be undue stress under the bonnet.</span></p>
                          <p class="MsoNormal"
                            style="mso-margin-top-alt: auto;
                            mso-margin-bottom-alt: auto;"><span class=""
                              style="font-size: 9pt; font-family: Arial,
                              sans-serif;">Simon</span></p>
                          <div class=""><span class="" style="font-size:
                              9pt; font-family: Arial, sans-serif;"> </span></div>
                          <div class="">
                            <div class="" style="border: none;
                              border-top: solid #E1E1E1 1.0pt; padding:
                              3.0pt 0cm 0cm 0cm;">
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><strong
                                  class=""><span class=""
                                    style="font-size: 9pt; font-family:
                                    Arial, sans-serif;" lang="EN-US">From:</span></strong><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;"
                                  lang="EN-US"> <a
                                    class="moz-txt-link-freetext"
                                    href="mailto:[email-masked]"
                                    moz-do-not-send="true">[email-masked]</a>
                                  &lt;<a class="moz-txt-link-freetext"
                                    href="mailto:[email-masked]"
                                    moz-do-not-send="true">[email-masked]</a>&gt;
                                  <br class="">
                                  <strong class=""><span class=""
                                      style="font-family:
                                      'Arial',sans-serif;">Sent:</span></strong>
                                  03 May 2023 20:56<br class="">
                                  <strong class=""><span class=""
                                      style="font-family:
                                      'Arial',sans-serif;">To:</span></strong>
                                  <a class="moz-txt-link-freetext"
                                    href="mailto:[email-masked]"
                                    moz-do-not-send="true">[email-masked]</a>;
                                  <a class="moz-txt-link-freetext"
                                    href="mailto:[email-masked]"
                                    moz-do-not-send="true">[email-masked]</a><br
                                    class="">
                                  <strong class=""><span class=""
                                      style="font-family:
                                      'Arial',sans-serif;">Subject:</span></strong>
                                  AW: [Healeys] Spark plug gap</span></p>
                            </div>
                          </div>
                          <div class=""><span class="" style="font-size:
                              9pt; font-family: Arial, sans-serif;"> </span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;">Spark
                              plugs are designed and tested to be used
                              with the gap given by the producer of the
                              spark plug.</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;">When you
                              widen the gap the plug gets hotter as it
                              is designed for and the electrode can melt
                              or wear very fast.</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;">Its a
                              very short win you gain modifying them.</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;">I never
                              understand why people think they are
                              better engineers and know better than the
                              designers of the system they use.</span></div>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;">Josef </span></div>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 10pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;">-----Original-Nachricht-----</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;">Betreff:
                              [Healeys] Spark plug gap</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;">Datum:
                              2023-05-03T21:39:57+0200</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;">Von:
                              "Simon Lachlan via Healeys" &lt;<a
                                class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>&gt;</span></div>
                          <div class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;">An:
                              "'Healeys'" &lt;<a
                                class="moz-txt-link-freetext"
                                href="mailto:[email-masked]"
                                moz-do-not-send="true">[email-masked]</a>&gt;</span></div>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <p class="" style="margin: 0px;"><span
                              class="" style="font-size: 9pt;
                              font-family: Arial, sans-serif;"> </span></p>
                          <div class="">
                            <div class="">
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">I run
                                  my MkII BT7 on NGK BP6ES which were
                                  recommended by some of the wise ones
                                  on this list.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">The
                                  car has a “Sports” coil and a
                                  123Ignition distributor. DW fast road
                                  cam…etc</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">Now,
                                  talking of “recommended”, the rolling
                                  road guys told me to set the plugs at
                                  0.028” and pooh-poohed anything bigger
                                  when I suggested that I’d heard of
                                  much greater gaps with my approximate
                                  setup.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">So, I
                                  went with 0.028.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">The
                                  other day, I decided to experiment and
                                  set my spare set at 0.032”. Same NGKs,
                                  no mileage on them..decent plugs.
                                  Anyhow, it made a very surprising
                                  difference. All round performance is
                                  much enhanced.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">Despite
                                  it’s 3:54 diff and 28% OD, it was
                                  never sluggish on our local hills. But
                                  now it fairly zooms up them.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">To be
                                  frank, all a bit of a surprise.</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">Not
                                  boasting…just putting that out there
                                  in case anyone else is thinking of
                                  going up a few thou…..</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">When
                                  I asked about gaps a few years back,
                                  some of the suggestions were near
                                  0.040”. Surely that a bit much?</span></p>
                              <p class="MsoNormal"
                                style="mso-margin-top-alt: auto;
                                mso-margin-bottom-alt: auto;"><span
                                  class="" style="font-size: 9pt;
                                  font-family: Arial, sans-serif;">Simon</span></p>
                            </div>
                          </div>
                          <div class=""><span class="" style="font-size:
                              9pt; font-family: Arial, sans-serif;"> </span></div>
                        </div>
                      </div>
                      <div class=""> </div>
                    </div>
                  </div>
                </div>
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[email-masked]

--===============4526619480246291102==--

---

From: <[email-masked]>
Date: Fri, 5 May 2023 16:05:59 -0700

This is a multipart message in MIME format.

--===============1698992989029018679==
	boundary="----=_NextPart_000_013E_01D97F6B.7C132D00"
Content-Language: en-us

This is a multipart message in MIME format.

------=_NextPart_000_013E_01D97F6B.7C132D00
	charset="utf-8"
Content-Transfer-Encoding: quoted-printable

Bob =E2=80=93 I=E2=80=99m afraid you have me confused=E2=80=A6

=20

You indicated =E2=80=9C=E2=80=A6theoretically, as long as the spark is =
hot enough to jump the gap it will ignite a proper mixture. A very lean =
mixture is harder to ignite, and a very rich mixture could 'drown' the =
spark ('stratified charge' engines use a richer mixture to ignite a =
leaner mixture). A hotter spark may more reliably ignite a non-ideal =
mixture, and may help a bit to ignite a proper one (higher compression =
engines require a hotter spark)=E2=80=A6.=E2=80=9D =20

=20

BUT Josef tells us that =E2=80=9C =E2=80=A6 Some people try to adjust =
the fuel mixture with a CO-tester. You can do that, but it doesn=C2=B4t =
give best results for road use, especially in hotter climates and high =
above sea level. =E2=80=A6=E2=80=9D

=20

SO =E2=80=93 If one can use an instrument and get a perfectly =
stoichiometric air/fuel ratio and it doesn=E2=80=99t give best results =
[Worse at altitude or in the summer driving season!] =E2=80=93 then =
surely all this fiddling with the spark plug gap to account for the =
engine=E2=80=99s particulars must be a fool=E2=80=99s errand, and cannot =
possibly work!!=20

=20

P.S.: And whatever you =E2=80=93 do NOT adjust the timing to try to make =
the car run its best.

=20

----------------

All the best,

=20

Al Fuller

=20

From: Healeys <[email-masked]> On Behalf Of Bob Spidell
Sent: Thursday, May 4, 2023 7:56 AM
To: [email-masked]
Subject: Re: [Healeys] Spark plug gap

=20

I'll chime in here (as is my wont). I'm not an EE--my electrical =
knowledge is self-taught--so if I'm incorrect feel free to correct.

The theoretical output of a coil--which is essentially half of an AC =
transformer--is determined by the ratio of its secondary winding to its =
primary. For example, a coil with 10 primary windings and 20,000 =
secondary windings will boost the primary 'signal' 2,000 times, so it =
would boost a primary signal of 12V to 24,000 volts. When the primary =
pulse to the coil is discontinued--e.g. points open--both the primary =
and secondary induced electrical fields collapse, and the secondary =
field is directed to the plugs*. The secondary field collapses until it =
produces sufficient voltage to overcome the resistance of the plug gap; =
hence the width of the gap determines the strength of the spark. For =
example--pulling numbers out of my exhaust pipe--if a 0.025" gap =
requires 10K volts to produce a spark, then a 0.030" gap might require =
12K volts to produce a spark. So, a larger gap produces a 'hotter' =
spark, up to the theoretical limit of the coil, and a hotter spark is =
better, no? Well, yes and no; theoretically, as long as the spark is hot =
enough to jump the gap it will ignite a proper mixture. A very lean =
mixture is harder to ignite, and a very rich mixture could 'drown' the =
spark ('stratified charge' engines use a richer mixture to ignite a =
leaner mixture). A hotter spark may more reliably ignite a non-ideal =
mixture, and may help a bit to ignite a proper one (higher compression =
engines require a hotter spark). But, as Josef noted, since every spark =
transmits some of the non-ground electrode--probably billions of =
atoms--to the ground electrode a hotter spark will erode the electrode =
faster (since erosion starts with the first spark and with a wider gap =
you should re-gap more often). Note condensers (capacitors) are used in =
points systems and SU fuel pumps to suppress spark arcing and subsequent =
points erosion. Which is why ...

Exotic metal--platinum or iridium--plugs are more resistant to erosion, =
which is why newer cars can go 80K miles or more without a 'tuneup,' =
which, for all intents-and-purposes just means swapping plugs (note they =
come in 'single' (default) or 'dual' types, meaning one or both =
electrodes are the exotic metal, respectively) . Old-style plugs with =
copper and steel electrodes can reliably go 15K miles or more, with one =
or two re-gaps, so exotic metal plugs aren't particularly useful for our =
cars which might do a couple thousand miles a year but, hey, knock =
yourself out. Note that platinum and iridium plugs come pre-gapped, and =
you'd best not mess with them. When I swapped plugs on my '08 Mustang I =
couldn't find a gap spec anywhere, but IIRC I futzed with them anyway =
(of course) and think they were all about 0.025". Fortunately, the car =
still ran well after my meddling and I traded it in in a few years =
anyway. Curiously, I watched a David Vizard video where he claimed he =
saw a slight mileage increase using E3 'DiamondFire' plugs, so there may =
be something to the plug voodoo. Fun fact: All the iridium on planet =
Earth came from a single asteroid, and is found in a layer of said earth =
deposited around the same time the dinosaurs went kaput. Coincidence? I =
think not.

Anybody who's worked on 'modern' cars, say, newer than 2000MY or so, has =
noted 'Coil On Plug' ('COP') technology, where each plug get its own =
coil. Now, the coils on these are small, about the size of an old 35mm =
film canister--remember those?--and you might say to yourself 'Self, how =
do they stuff all that wiring into that little film canister' and the =
answer is, the wires gotta be real tiny and, yep, as you might expect =
they are fragile compared to our Bud Light can-sized (sorry) old school =
Lucas coils. Early COP systems--looking at you, VW--were prone to =
gremlins and I still hear about COP failures on newer cars and other =
makes, esp. with DOHC engines which always, eventually, seem to get =
leaky valve cover gaskets which dump oil into the plug tubes (as opposed =
to leaky Healey valve cover gaskets which just dump oil, well, =
everywhere).

Bob

* Note coils for our Healeys come with either 'SW' ('switch;' i.e. =
ignition switch)  and 'CB' ('contact breaker;' i.e. points/distributor)  =
or '+' and '-' labels on the primary terminals. They'll work either way, =
but some voodoo is employed whereby, when properly connected the =
secondary field is routed in series with the primary circuit to give a =
slight boost to produced spark.

=20

=20

=20

-----Original-Nachricht-----

"[email-masked]"  =
<[email-masked]>

=20

=20

=20

Someone mentioned that he used =E2=80=9CIridium=E2=80=9D plugs from NGK. =
I googled them=E2=80=A6.horribly expensive. Can they be worth it in our =
old cars?

Simon

=20

Sent: 04 May 2023 07:06

=20

Some people try to adjust the fuel mixture with a CO-tester. You can do =
that, but it doesn=C2=B4t give best results for road use, especially in =
hotter climates and high above sea level.=20

When you are very good in engine engineering and have all the tools you =
can try to find some more horsepower in your engine, but you always pay =
that with some more heat produced, which is not at all good for our old =
BMC engines.

=20

Josef

=20

=20

=20

-----Original-Nachricht-----

=20

=20

=20

You may be right. Not sure.=20

Likewise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to =
0.026=E2=80=9D and that was some 60+ years ago. I=E2=80=99ve always been =
told that Champion plugs aren=E2=80=99t the best in the world and =
I=E2=80=99m sure that a modern NGK can stand a little more heat than the =
Champions that were around 60 years ago.

Simon

=20

Sent: 03 May 2023 20:56

=20

Spark plugs are designed and tested to be used with the gap given by the =
producer of the spark plug.

=20

Josef=20

=20

=20

=20

=20

-----Original-Nachricht-----

=20

=20

=20

So, I went with 0.028.

Despite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our =
local hills. But now it fairly zooms up them.

Not boasting=E2=80=A6just putting that out there in case anyone else is =
thinking of going up a few thou=E2=80=A6..

Simon

=20

=20

=EF=BB=BF=20

http://autox.team.net/mailman/options/healeys/[email-masked]
=20

=20

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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple style=3D'word-wrap:break-word'><div =
class=3DWordSection1><p class=3DMsoNormal>Bob =E2=80=93 I=E2=80=99m =
afraid you have me confused=E2=80=A6<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p style=3D'margin:0in'>You =
indicated =E2=80=9C=E2=80=A6theoretically, as long as the spark is hot =
enough to jump the gap it will ignite a proper mixture. A very lean =
mixture is harder to ignite, and a very rich mixture could 'drown' the =
spark ('stratified charge' engines use a richer mixture to ignite a =
leaner mixture). A hotter spark may more reliably ignite a non-ideal =
mixture, and may help a bit to ignite a proper one (higher compression =
engines require a hotter spark)=E2=80=A6.=E2=80=9D=C2=A0 =
<o:p></o:p></p><p style=3D'margin:0in'><o:p>&nbsp;</o:p></p><p =
style=3D'margin:0in'>BUT Josef tells us that =E2=80=9C =E2=80=A6<span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'> =
Some people try to adjust the fuel mixture with a CO-tester. You can do =
that, but it doesn=C2=B4t give best results for road use, especially in =
hotter climates and high above sea level. =
=E2=80=A6=E2=80=9D<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p>&nbsp;</o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>SO =
=E2=80=93 If one can use an instrument and get a perfectly =
stoichiometric air/fuel ratio and it doesn=E2=80=99t give best results =
[Worse at altitude or in the summer driving season!] =E2=80=93 then =
surely all this fiddling with the spark plug gap to account for the =
engine=E2=80=99s particulars must be a fool=E2=80=99s errand, and cannot =
possibly work!! <o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:=
p>&nbsp;</o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>P.S=
.: And whatever you =E2=80=93 do NOT adjust the timing to try to make =
the car run its best.</span><o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p =
class=3DMsoNormal>----------------<o:p></o:p></p><p =
class=3DMsoNormal>All the best,<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal>Al =
Fuller<o:p></o:p></p></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> Healeys =
&lt;[email-masked]&gt; <b>On Behalf Of </b>Bob =
Spidell<br><b>Sent:</b> Thursday, May 4, 2023 7:56 AM<br><b>To:</b> =
[email-masked]<br><b>Subject:</b> Re: [Healeys] Spark plug =
gap<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>I'll chime in here (as is my wont). I'm =
not an EE--my electrical knowledge is self-taught--so if I'm incorrect =
feel free to correct.<br><br>The theoretical output of a coil--which is =
essentially half of an AC transformer--is determined by the ratio of its =
secondary winding to its primary. For example, a coil with 10 primary =
windings and 20,000 secondary windings will boost the primary 'signal' =
2,000 times, so it would boost a primary signal of 12V to 24,000 volts. =
When the primary pulse to the coil is discontinued--e.g. points =
open--both the primary and secondary induced electrical fields collapse, =
and the secondary field is directed to the plugs*. The secondary field =
collapses until it produces sufficient voltage to overcome the =
resistance of the plug gap; hence the width of the gap determines the =
strength of the spark. For example--pulling numbers out of my exhaust =
pipe--if a 0.025&quot; gap requires 10K volts to produce a spark, then a =
0.030&quot; gap might require 12K volts to produce a spark. So, a larger =
gap produces a 'hotter' spark, up to the theoretical limit of the coil, =
and a hotter spark is better, no? Well, yes and no; theoretically, as =
long as the spark is hot enough to jump the gap it will ignite a proper =
mixture. A very lean mixture is harder to ignite, and a very rich =
mixture could 'drown' the spark ('stratified charge' engines use a =
richer mixture to ignite a leaner mixture). A hotter spark may more =
reliably ignite a non-ideal mixture, and may help a bit to ignite a =
proper one (higher compression engines require a hotter spark). But, as =
Josef noted, since every spark transmits some of the non-ground =
electrode--probably billions of atoms--to the ground electrode a hotter =
spark will erode the electrode faster (since erosion starts with the =
first spark and with a wider gap you should re-gap more often). Note =
condensers (capacitors) are used in points systems and SU fuel pumps to =
suppress spark arcing and subsequent points erosion. Which is why =
...<br><br>Exotic metal--platinum or iridium--plugs are more resistant =
to erosion, which is why newer cars can go 80K miles or more without a =
'tuneup,' which, for all intents-and-purposes just means swapping plugs =
(note they come in 'single' (default) or 'dual' types, meaning one or =
both electrodes are the exotic metal, respectively) . Old-style plugs =
with copper and steel electrodes can reliably go 15K miles or more, with =
one or two re-gaps, so exotic metal plugs aren't particularly useful for =
our cars which might do a couple thousand miles a year but, hey, knock =
yourself out. Note that platinum and iridium plugs come pre-gapped, and =
you'd best not mess with them. When I swapped plugs on my '08 Mustang I =
couldn't find a gap spec anywhere, but IIRC I futzed with them anyway =
(of course) and think they were all about 0.025&quot;. Fortunately, the =
car still ran well after my meddling and I traded it in in a few years =
anyway. Curiously, I watched a David Vizard video where he claimed he =
saw a <i>slight</i> mileage increase using E3 'DiamondFire' plugs, so =
there may be something to the plug voodoo. Fun fact: All the iridium on =
planet Earth came from a single asteroid, and is found in a layer of =
said earth deposited around the same time the dinosaurs went kaput. =
Coincidence? I think not.<br><br>Anybody who's worked on 'modern' cars, =
say, newer than 2000MY or so, has noted 'Coil On Plug' ('COP') =
technology, where each plug get its own coil. Now, the coils on these =
are small, about the size of an old 35mm film canister--remember =
those?--and you might say to yourself 'Self, how do they stuff all that =
wiring into that little film canister' and the answer is, the wires =
gotta be real tiny and, yep, as you might expect they are fragile =
compared to our Bud Light can-sized (sorry) old school Lucas coils. =
Early COP systems--looking at you, VW--were prone to gremlins and I =
still hear about COP failures on newer cars and other makes, esp. with =
DOHC engines which always, eventually, seem to get leaky valve cover =
gaskets which dump oil into the plug tubes (as opposed to leaky Healey =
valve cover gaskets which just dump oil, well, everywhere).<br><br>OK, =
caffeine rush is fading. Ciao.<br><br>Bob<br><br>* Note coils for our =
Healeys come with either 'SW' ('switch;' i.e. ignition switch)&nbsp; and =
'CB' ('contact breaker;' i.e. points/distributor)&nbsp; or '+' and '-' =
labels on the primary terminals. They'll work either way, but some =
voodoo is employed whereby, when properly connected the secondary field =
is routed in series with the primary circuit to give a slight boost to =
produced spark.<br><br><br><o:p></o:p></p><div><p class=3DMsoNormal>On =
5/4/2023 4:43 AM, josef-eckert--- via Healeys =
wrote:<o:p></o:p></p></div><blockquote =
style=3D'margin-top:5.0pt;margin-bottom:5.0pt'><p =
style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Sor=
ry, I am out here. This guy wants to play till the engine is =
shot.</span><o:p></o:p></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><o:p></o:p></p><p style=3D'margin:0in'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0in'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0in'>-----Original-Nachricht-----<o:p></o:p></p><p =
style=3D'margin:0in'>Betreff: RE: [Healeys] Spark plug =
gap<o:p></o:p></p><p style=3D'margin:0in'>Datum: =
2023-05-04T12:45:37+0200<o:p></o:p></p><p style=3D'margin:0in'>Von: <a =
href=3D"mailto:[email-masked]">&quot;simon.lachlan@ale=
xarevel.plus.com&quot;</a> <a =
href=3D"mailto:[email-masked]">&lt;simon.lachlan@alexa=
revel.plus.com&gt;</a><o:p></o:p></p><p style=3D'margin:0in'>An: <a =
href=3D"mailto:[email-masked]">&quot;[email-masked]&q=
uot;</a> <a =
href=3D"mailto:[email-masked]">&lt;[email-masked]&gt;=
</a><o:p></o:p></p><p style=3D'margin:0in'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0in'>&nbsp;<o:p></o:p></p><p =
style=3D'margin:0in'>&nbsp;<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Than=
ks for that. I=E2=80=99ll certainly bear it in mind. Likewise, =
I=E2=80=99ll keep a close eye on my engine=E2=80=99s temperature. The =
latter is quite well protected with a modern rad, all the correct =
baffles, 5 blade fan plus electronic fan. But, as I said, I=E2=80=99ll =
keep an eye on it.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Some=
one mentioned that he used =E2=80=9CIridium=E2=80=9D plugs from NGK. I =
googled them=E2=80=A6.horribly expensive. Can they be worth it in our =
old cars?<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Simo=
n<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><div><div style=3D'border:none;border-top:solid =
#E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><spa=
n =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>From=
:</span></strong><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'> <a =
href=3D"mailto:[email-masked]">[email-masked]</a> <a =
href=3D"mailto:[email-masked]">&lt;[email-masked]&gt;=
</a> <br><strong><span =
style=3D'font-family:"Arial",sans-serif'>Sent:</span></strong> 04 May =
2023 07:06<br><strong><span =
style=3D'font-family:"Arial",sans-serif'>To:</span></strong> <a =
href=3D"mailto:[email-masked]">simon.lachlan@alexareve=
l.plus.com</a>; Healey, Forum <a =
href=3D"mailto:[email-masked]">&lt;[email-masked]&gt;</a>=
<br><strong><span =
style=3D'font-family:"Arial",sans-serif'>Subject:</span></strong> AW: =
[Healeys] Spark plug gap<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>For=
 me, i prefer Champion plugs plugs to NGK, but that=C2=B4s a matter of =
taste. I think both, Champion and NGK, are of similar quality. Matter of =
taste, as I wrote. But NOT the car manufacturer determines the plug gap, =
its the plug manufacturer. Definitely the car manufacturer takes this =
for his specs in the workshop manual.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>The=
re is to much hype about plugs anyway. I am working as a professional, =
Elecrtonics and Elecrtrcian engineer, at a big classic car parts =
supplier here in Europe and I never go away from the given plug gap as =
set by the plug manufacturer. Austin-Healey engines&nbsp; are not high =
tech, they are tractor engines and can take a lot of misfit, but anyway =
BMC knew at the time what=C2=B4s best to do with them, even its printed =
60 or 70 years ago.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Som=
e people try to adjust the fuel mixture with a CO-tester. You can do =
that, but it doesn=C2=B4t give best results for road use, especially in =
hotter climates and high above sea level. </span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Whe=
n you are very good in engine engineering and have all the tools you can =
try to find some more horsepower in your engine, but you always pay that =
with some more heat produced, which is not at all good for our old BMC =
engines.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Jos=
ef</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>----=
-Original-Nachricht-----<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Betr=
eff: RE: [Healeys] Spark plug gap<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Datu=
m: 2023-05-04T00:06:58+0200<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Von:=
 &quot;<a =
href=3D"mailto:[email-masked]">simon.lachlan@alexareve=
l.plus.com</a>&quot; &lt;<a =
href=3D"mailto:[email-masked]">simon.lachlan@alexareve=
l.plus.com</a>&gt;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>An: =
&quot;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&quo=
t; &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;=
<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>You =
may be right. Not sure. <o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Actu=
ally I thought that the gap was determined by the car=E2=80=99s =
manufacturer ie one could expect to find the same plug in two different =
cars and to find that the recommended gap was not the same for each =
car.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Like=
wise, the BMC manual suggests Champion plugs at 0.024=E2=80=9D to =
0.026=E2=80=9D and that was some 60+ years ago. I=E2=80=99ve always been =
told that Champion plugs aren=E2=80=99t the best in the world and =
I=E2=80=99m sure that a modern NGK can stand a little more heat than the =
Champions that were around 60 years ago.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Anyh=
ow, I=E2=80=99ll keep an eye on them. I=E2=80=99m a pretty tame driver =
so there won=E2=80=99t be undue stress under the =
bonnet.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Simo=
n<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><div><div style=3D'border:none;border-top:solid =
#E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><strong><spa=
n =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>From=
:</span></strong><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'> <a =
href=3D"mailto:[email-masked]">[email-masked]</a> =
&lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;=
 <br><strong><span =
style=3D'font-family:"Arial",sans-serif'>Sent:</span></strong> 03 May =
2023 20:56<br><strong><span =
style=3D'font-family:"Arial",sans-serif'>To:</span></strong> <a =
href=3D"mailto:[email-masked]">simon.lachlan@alexareve=
l.plus.com</a>; <a =
href=3D"mailto:[email-masked]">[email-masked]</a><br><str=
ong><span =
style=3D'font-family:"Arial",sans-serif'>Subject:</span></strong> AW: =
[Healeys] Spark plug gap<o:p></o:p></span></p></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Spa=
rk plugs are designed and tested to be used with the gap given by the =
producer of the spark plug.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Whe=
n you widen the gap the plug gets hotter as it is designed for and the =
electrode can melt or wear very fast.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Its=
 a very short win you gain modifying them.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>I =
never understand why people think they are better engineers and know =
better than the designers of the system they use.</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>Jos=
ef </span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>&nb=
sp;</span><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'><o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>----=
-Original-Nachricht-----<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Betr=
eff: [Healeys] Spark plug gap<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Datu=
m: 2023-05-03T21:39:57+0200<o:p></o:p></span></p><p =
style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Von:=
 &quot;Simon Lachlan via Healeys&quot; &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>An: =
&quot;'Healeys'&quot; &lt;<a =
href=3D"mailto:[email-masked]">[email-masked]</a>&gt;<o:p=
></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><p style=3D'margin:0in'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>I =
run my MkII BT7 on NGK BP6ES which were recommended by some of the wise =
ones on this list.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>The =
car has a =E2=80=9CSports=E2=80=9D coil and a 123Ignition distributor. =
DW fast road cam=E2=80=A6etc<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Now,=
 talking of =E2=80=9Crecommended=E2=80=9D, the rolling road guys told me =
to set the plugs at 0.028=E2=80=9D and pooh-poohed anything bigger when =
I suggested that I=E2=80=99d heard of much greater gaps with my =
approximate setup.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>So, =
I went with 0.028.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>The =
other day, I decided to experiment and set my spare set at =
0.032=E2=80=9D. Same NGKs, no mileage on them..decent plugs. Anyhow, it =
made a very surprising difference. All round performance is much =
enhanced.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Desp=
ite it=E2=80=99s 3:54 diff and 28% OD, it was never sluggish on our =
local hills. But now it fairly zooms up them.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>To =
be frank, all a bit of a surprise.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Not =
boasting=E2=80=A6just putting that out there in case anyone else is =
thinking of going up a few thou=E2=80=A6..<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>When=
 I asked about gaps a few years back, some of the suggestions were near =
0.040=E2=80=9D. Surely that a bit much?<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>Simo=
n<o:p></o:p></span></p></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p></div></div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
style=3D'font-size:9.0pt;font-family:"Arial",sans-serif;color:black'>&nbs=
p;<o:p></o:p></span></p></div></div><p class=3DMsoNormal>=EF=BB=BF =
<br><br><o:p></o:p></p><pre>_____________________________________________=
__<o:p></o:p></pre><pre>Support Team.Net <a =
href=3D"http://www.team.net/donate.html">http://www.team.net/donate.html<=
/a><o:p></o:p></pre><pre>Suggested annual donation=C2=A0 =
$12.75<o:p></o:p></pre><pre><o:p>&nbsp;</o:p></pre><pre>Archive: <a =
href=3D"http://www.team.net/pipermail/healeys">http://www.team.net/piperm=
ail/healeys</a> <a =
href=3D"http://autox.team.net/archive/healeys">http://autox.team.net/arch=
ive/healeys</a><o:p></o:p></pre><pre><o:p>&nbsp;</o:p></pre><pre><a =
href=3D"mailto:[email-masked]">[email-masked]</a><o:p></o=
:p></pre><pre><a =
href=3D"http://autox.team.net/mailman/listinfo/healeys">http://autox.team=
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/pre><pre>Unsubscribe/Manage: <a =
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[email-masked]

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---

From: Bob Spidell <[email-masked]>
Date: Fri, 5 May 2023 17:25:22 -0700

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re: "... all this fiddling with the spark plug gap to account for the 
engine’s particulars must be a fool’s errand, and cannot possibly work!! "

It works if your car runs smoothly. If you run a little toward the lean 
side--which Healeys don't like--a performance coil and a little more gap 
may help give a little smoother running engine. Running very rich, to 
the point you get black soot out of the exhaust is not advisable for a 
number of reasons. So, set your mixture as you like and set your gap at 
book 'spec,' or a little larger if you like. A carburetted engine isn't 
likely to run at stoichiometric, except possibly under specific 
conditions and, probably, purely accidentally. Running very lean 
increases NOx emissions--why some engines have EGR valves (boo 
hiss)--and running rich will kill a catalytic converter before someone 
even gets a chance to steal it.

Piston aircraft with well-designed fuel injection systems--typically 
Continentals--tuned injectors and multi-cylinder CHT/EGT meters can run 
'lean of peak' for economy/endurance. Running at peak, i.e. 
stoichiometric, is inadvisable because it produces the hottest 
combustion temperatures and will cook these glorified lawnmower engines.

Richard M. probably has dyno numbers that show the effect of mixture vs. 
plug gap.

bs

On 5/5/2023 4:05 PM, [email-masked] wrote:
>
> Bob – I’m afraid you have me confused…
>
> You indicated “…theoretically, as long as the spark is hot enough to 
> jump the gap it will ignite a proper mixture. A very lean mixture is 
> harder to ignite, and a very rich mixture could 'drown' the spark 
> ('stratified charge' engines use a richer mixture to ignite a leaner 
> mixture). A hotter spark may more reliably ignite a non-ideal mixture, 
> and may help a bit to ignite a proper one (higher compression engines 
> require a hotter spark)….”
>
> BUT Josef tells us that “ …Some people try to adjust the fuel mixture 
> with a CO-tester. You can do that, but it doesn´t give best results 
> for road use, especially in hotter climates and high above sea level. …”
>
> SO – If one can use an instrument and get a perfectly stoichiometric 
> air/fuel ratio and it doesn’t give best results [Worse at altitude or 
> in the summer driving season!] – then surely all this fiddling with 
> the spark plug gap to account for the engine’s particulars must be a 
> fool’s errand, and cannot possibly work!!
>
> P.S.: And whatever you – do NOT adjust the timing to try to make the 
> car run its best.
>
> ----------------
>
> All the best,
>
> Al Fuller
>
> *From:* Healeys <[email-masked]> *On Behalf Of *Bob 
> Spidell
> *Sent:* Thursday, May 4, 2023 7:56 AM
> *To:* [email-masked]
> *Subject:* Re: [Healeys] Spark plug gap
>
> field is directed to the plugs*. The secondary field collapses until 
> it produces sufficient voltage to overcome the resistance of the plug 
> gap; hence the width of the gap determines the strength of the spark. 
> For example--pulling numbers out of my exhaust pipe--if a 0.025" gap 
> better, no? Well, yes and no; theoretically, as long as the spark is 
> hot enough to jump the gap it will ignite a proper mixture. A very 
> lean mixture is harder to ignite, and a very rich mixture could 
> 'drown' the spark ('stratified charge' engines use a richer mixture to 
> ignite a leaner mixture). A hotter spark may more reliably ignite a 
> non-ideal mixture, and may help a bit to ignite a proper one (higher 
> compression engines require a hotter spark). But, as Josef noted, 
> since every spark transmits some of the non-ground electrode--probably 
> billions of atoms--to the ground electrode a hotter spark will erode 
> the electrode faster (since erosion starts with the first spark and 
> with a wider gap you should re-gap more often). Note condensers 
> (capacitors) are used in points systems and SU fuel pumps to suppress 
> spark arcing and subsequent points erosion. Which is why ...
>
> one or both electrodes are the exotic metal, respectively) . Old-style 
> plugs with copper and steel electrodes can reliably go 15K miles or 
> more, with one or two re-gaps, so exotic metal plugs aren't 
> iridium plugs come pre-gapped, and you'd best not mess with them. When 
> I swapped plugs on my '08 Mustang I couldn't find a gap spec anywhere, 
> but IIRC I futzed with them anyway (of course) and think they were all 
> about 0.025". Fortunately, the car still ran well after my meddling 
> and I traded it in in a few years anyway. Curiously, I watched a David 
> Vizard video where he claimed he saw a /slight/ mileage increase using 
> E3 'DiamondFire' plugs, so there may be something to the plug voodoo. 
> Fun fact: All the iridium on planet Earth came from a single asteroid, 
> and is found in a layer of said earth deposited around the same time 
> the dinosaurs went kaput. Coincidence? I think not.
>
> own coil. Now, the coils on these are small, about the size of an old 
> 35mm film canister--remember those?--and you might say to yourself 
> 'Self, how do they stuff all that wiring into that little film 
> canister' and the answer is, the wires gotta be real tiny and, yep, as 
> you might expect they are fragile compared to our Bud Light can-sized 
> (sorry) old school Lucas coils. Early COP systems--looking at you, 
> VW--were prone to gremlins and I still hear about COP failures on 
> newer cars and other makes, esp. with DOHC engines which always, 
> eventually, seem to get leaky valve cover gaskets which dump oil into 
> the plug tubes (as opposed to leaky Healey valve cover gaskets which 
> just dump oil, well, everywhere).
>
> primary circuit to give a slight boost to produced spark.
>
>

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    re: "... <span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">all
      this fiddling with the spark plug gap to account for the engine’s
      particulars must be a fool’s errand, and cannot possibly work!! "<br>
      <br>
      It works if your car runs smoothly. If you run a little toward the
      lean side--which Healeys don't like--a performance coil and a
      little more gap may help give a little smoother running engine.
      Running very rich, to the point you get black soot out of the
      exhaust is not advisable for a number of reasons. So, set your
      mixture as you like and set your gap at book 'spec,' or a little
      larger if you like. A carburetted engine isn't likely to run at
      stoichiometric, except possibly under specific conditions and,
      probably, purely accidentally. Running very lean increases NOx
      emissions--why some engines have EGR valves (boo hiss)--and
      running rich will kill a catalytic converter before someone even
      gets a chance to steal it.<br>
      <br>
      Piston aircraft with well-designed fuel injection
      systems--typically Continentals--tuned injectors and
      multi-cylinder CHT/EGT meters can run 'lean of peak' for
      economy/endurance. Running at peak, i.e. stoichiometric, is
      inadvisable because it produces the hottest combustion
      temperatures and will cook these glorified lawnmower engines.<br>
      <br>
      Richard M. probably has dyno numbers that show the effect of
      mixture vs. plug gap.<br>
      <br>
      bs<br>
    </span><br>
    <div class="moz-cite-prefix">On 5/5/2023 4:05 PM,
      <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a> wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:[email-masked]">
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      <div class="WordSection1">
        <p class="MsoNormal">Bob – I’m afraid you have me confused…<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p style="margin:0in">You indicated “…theoretically, as long as
          the spark is hot enough to jump the gap it will ignite a
          proper mixture. A very lean mixture is harder to ignite, and a
          very rich mixture could 'drown' the spark ('stratified charge'
          engines use a richer mixture to ignite a leaner mixture). A
          hotter spark may more reliably ignite a non-ideal mixture, and
          may help a bit to ignite a proper one (higher compression
          engines require a hotter spark)….”  <o:p></o:p></p>
        <p style="margin:0in"><o:p> </o:p></p>
        <p style="margin:0in">BUT Josef tells us that “ …<span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">
            Some people try to adjust the fuel mixture with a CO-tester.
            You can do that, but it doesn´t give best results for road
            use, especially in hotter climates and high above sea level.
            …”<o:p></o:p></span></p>
        <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
        <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">SO
            – If one can use an instrument and get a perfectly
            stoichiometric air/fuel ratio and it doesn’t give best
            results [Worse at altitude or in the summer driving season!]
            – then surely all this fiddling with the spark plug gap to
            account for the engine’s particulars must be a fool’s
            errand, and cannot possibly work!! <o:p></o:p></span></p>
        <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p> </o:p></span></p>
        <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">P.S.:
            And whatever you – do NOT adjust the timing to try to make
            the car run its best.</span><o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <p class="MsoNormal">----------------<o:p></o:p></p>
          <p class="MsoNormal">All the best,<o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
          <p class="MsoNormal">Al Fuller<o:p></o:p></p>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <div>
          <div style="border:none;border-top:solid #E1E1E1
            1.0pt;padding:3.0pt 0in 0in 0in">
            <p class="MsoNormal"><b>From:</b> Healeys
              <a class="moz-txt-link-rfc2396E" href="mailto:[email-masked]">&lt;[email-masked]&gt;</a> <b>On Behalf Of </b>Bob
              Spidell<br>
              <b>Sent:</b> Thursday, May 4, 2023 7:56 AM<br>
              <b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:[email-masked]">[email-masked]</a><br>
              <b>Subject:</b> Re: [Healeys] Spark plug gap<o:p></o:p></p>
          </div>
        </div>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal" style="margin-bottom:12.0pt">I'll chime in
          here (as is my wont). I'm not an EE--my electrical knowledge
          is self-taught--so if I'm incorrect feel free to correct.<br>
          <br>
          The theoretical output of a coil--which is essentially half of
          an AC transformer--is determined by the ratio of its secondary
          winding to its primary. For example, a coil with 10 primary
          windings and 20,000 secondary windings will boost the primary
          'signal' 2,000 times, so it would boost a primary signal of
          12V to 24,000 volts. When the primary pulse to the coil is
          discontinued--e.g. points open--both the primary and secondary
          induced electrical fields collapse, and the secondary field is
          directed to the plugs*. The secondary field collapses until it
          produces sufficient voltage to overcome the resistance of the
          plug gap; hence the width of the gap determines the strength
          of the spark. For example--pulling numbers out of my exhaust
          pipe--if a 0.025" gap requires 10K volts to produce a spark,
          then a 0.030" gap might require 12K volts to produce a spark.
          So, a larger gap produces a 'hotter' spark, up to the
          theoretical limit of the coil, and a hotter spark is better,
          no? Well, yes and no; theoretically, as long as the spark is
          hot enough to jump the gap it will ignite a proper mixture. A
          very lean mixture is harder to ignite, and a very rich mixture
          could 'drown' the spark ('stratified charge' engines use a
          richer mixture to ignite a leaner mixture). A hotter spark may
          more reliably ignite a non-ideal mixture, and may help a bit
          to ignite a proper one (higher compression engines require a
          hotter spark). But, as Josef noted, since every spark
          transmits some of the non-ground electrode--probably billions
          of atoms--to the ground electrode a hotter spark will erode
          the electrode faster (since erosion starts with the first
          spark and with a wider gap you should re-gap more often). Note
          condensers (capacitors) are used in points systems and SU fuel
          pumps to suppress spark arcing and subsequent points erosion.
          Which is why ...<br>
          <br>
          Exotic metal--platinum or iridium--plugs are more resistant to
          erosion, which is why newer cars can go 80K miles or more
          without a 'tuneup,' which, for all intents-and-purposes just
          means swapping plugs (note they come in 'single' (default) or
          'dual' types, meaning one or both electrodes are the exotic
          metal, respectively) . Old-style plugs with copper and steel
          electrodes can reliably go 15K miles or more, with one or two
          re-gaps, so exotic metal plugs aren't particularly useful for
          our cars which might do a couple thousand miles a year but,
          hey, knock yourself out. Note that platinum and iridium plugs
          come pre-gapped, and you'd best not mess with them. When I
          swapped plugs on my '08 Mustang I couldn't find a gap spec
          anywhere, but IIRC I futzed with them anyway (of course) and
          think they were all about 0.025". Fortunately, the car still
          ran well after my meddling and I traded it in in a few years
          anyway. Curiously, I watched a David Vizard video where he
          claimed he saw a <i>slight</i> mileage increase using E3
          'DiamondFire' plugs, so there may be something to the plug
          voodoo. Fun fact: All the iridium on planet Earth came from a
          single asteroid, and is found in a layer of said earth
          deposited around the same time the dinosaurs went kaput.
          Coincidence? I think not.<br>
          <br>
          Anybody who's worked on 'modern' cars, say, newer than 2000MY
          or so, has noted 'Coil On Plug' ('COP') technology, where each
          plug get its own coil. Now, the coils on these are small,
          about the size of an old 35mm film canister--remember
          those?--and you might say to yourself 'Self, how do they stuff
          all that wiring into that little film canister' and the answer
          is, the wires gotta be real tiny and, yep, as you might expect
          they are fragile compared to our Bud Light can-sized (sorry)
          old school Lucas coils. Early COP systems--looking at you,
          VW--were prone to gremlins and I still hear about COP failures
          on newer cars and other makes, esp. with DOHC engines which
          always, eventually, seem to get leaky valve cover gaskets
          which dump oil into the plug tubes (as opposed to leaky Healey
          valve cover gaskets which just dump oil, well, everywhere).<br>
          <br>
          OK, caffeine rush is fading. Ciao.<br>
          <br>
          Bob<br>
          <br>
          * Note coils for our Healeys come with either 'SW' ('switch;'
          i.e. ignition switch)  and 'CB' ('contact breaker;' i.e.
          points/distributor)  or '+' and '-' labels on the primary
          terminals. They'll work either way, but some voodoo is
          employed whereby, when properly connected the secondary field
          is routed in series with the primary circuit to give a slight
          boost to produced spark.<br>
          <br>
          <br>
          <o:p></o:p></p>
        <div>
          <p class="MsoNormal">On 5/4/2023 4:43 AM, josef-eckert--- via
            Healeys wrote:<o:p></o:p></p>
        </div>
        <blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
          <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Sorry,
              I am out here. This guy wants to play till the engine is
              shot.</span><o:p></o:p></p>
          <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><o:p></o:p></p>
          <p style="margin:0in"> <o:p></o:p></p>
          <p style="margin:0in"> <o:p></o:p></p>
          <p style="margin:0in">-----Original-Nachricht-----<o:p></o:p></p>
          <p style="margin:0in">Betreff: RE: [Healeys] Spark plug gap<o:p></o:p></p>
          <p style="margin:0in">Datum: 2023-05-04T12:45:37+0200<o:p></o:p></p>
          <p style="margin:0in">Von: <a
              href="mailto:[email-masked]"
              moz-do-not-send="true">"[email-masked]"</a>
            <a href="mailto:[email-masked]"
              moz-do-not-send="true">&lt;[email-masked]&gt;</a><o:p></o:p></p>
          <p style="margin:0in">An: <a
              href="mailto:[email-masked]"
              moz-do-not-send="true">"[email-masked]"</a> <a
              href="mailto:[email-masked]"
              moz-do-not-send="true">&lt;[email-masked]&gt;</a><o:p></o:p></p>
          <p style="margin:0in"> <o:p></o:p></p>
          <p style="margin:0in"> <o:p></o:p></p>
          <p style="margin:0in"> <o:p></o:p></p>
          <div>
            <div>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Thanks
                  for that. I’ll certainly bear it in mind. Likewise,
                  I’ll keep a close eye on my engine’s temperature. The
                  latter is quite well protected with a modern rad, all
                  the correct baffles, 5 blade fan plus electronic fan.
                  But, as I said, I’ll keep an eye on it.<o:p></o:p></span></p>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Someone
                  mentioned that he used “Iridium” plugs from NGK. I
                  googled them….horribly expensive. Can they be worth it
                  in our old cars?<o:p></o:p></span></p>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Simon<o:p></o:p></span></p>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <div>
                <div style="border:none;border-top:solid #E1E1E1
                  1.0pt;padding:3.0pt 0in 0in 0in">
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><strong><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">From:</span></strong><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">
                      <a href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>
                      <a href="mailto:[email-masked]"
                        moz-do-not-send="true">&lt;[email-masked]&gt;</a>
                      <br>
                      <strong><span
                          style="font-family:&quot;Arial&quot;,sans-serif">Sent:</span></strong>
                      04 May 2023 07:06<br>
                      <strong><span
                          style="font-family:&quot;Arial&quot;,sans-serif">To:</span></strong>
                      <a href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>;
                      Healey, Forum <a
                        href="mailto:[email-masked]"
                        moz-do-not-send="true">&lt;[email-masked]&gt;</a><br>
                      <strong><span
                          style="font-family:&quot;Arial&quot;,sans-serif">Subject:</span></strong>
                      AW: [Healeys] Spark plug gap<o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">For
                  me, i prefer Champion plugs plugs to NGK, but that´s a
                  matter of taste. I think both, Champion and NGK, are
                  of similar quality. Matter of taste, as I wrote. But
                  NOT the car manufacturer determines the plug gap, its
                  the plug manufacturer. Definitely the car manufacturer
                  takes this for his specs in the workshop manual.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">There
                  is to much hype about plugs anyway. I am working as a
                  professional, Elecrtonics and Elecrtrcian engineer, at
                  a big classic car parts supplier here in Europe and I
                  never go away from the given plug gap as set by the
                  plug manufacturer. Austin-Healey engines  are not high
                  tech, they are tractor engines and can take a lot of
                  misfit, but anyway BMC knew at the time what´s best to
                  do with them, even its printed 60 or 70 years ago.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Some
                  people try to adjust the fuel mixture with a
                  CO-tester. You can do that, but it doesn´t give best
                  results for road use, especially in hotter climates
                  and high above sea level. </span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">When
                  you are very good in engine engineering and have all
                  the tools you can try to find some more horsepower in
                  your engine, but you always pay that with some more
                  heat produced, which is not at all good for our old
                  BMC engines.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Josef</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">-----Original-Nachricht-----<o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Betreff:
                  RE: [Healeys] Spark plug gap<o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Datum:
                  2023-05-04T00:06:58+0200<o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Von:
                  "<a href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>"
                  &lt;<a href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;<o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">An:
                  "<a href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>"
                  &lt;<a href="mailto:[email-masked]"
                    moz-do-not-send="true" class="moz-txt-link-freetext">[email-masked]</a>&gt;<o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
              <div>
                <div>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">You
                      may be right. Not sure. <o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Actually
                      I thought that the gap was determined by the car’s
                      manufacturer ie one could expect to find the same
                      plug in two different cars and to find that the
                      recommended gap was not the same for each car.<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Likewise,
                      the BMC manual suggests Champion plugs at 0.024”
                      to 0.026” and that was some 60+ years ago. I’ve
                      always been told that Champion plugs aren’t the
                      best in the world and I’m sure that a modern NGK
                      can stand a little more heat than the Champions
                      that were around 60 years ago.<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Anyhow,
                      I’ll keep an eye on them. I’m a pretty tame driver
                      so there won’t be undue stress under the bonnet.<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Simon<o:p></o:p></span></p>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <div>
                    <div style="border:none;border-top:solid #E1E1E1
                      1.0pt;padding:3.0pt 0in 0in 0in">
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><strong><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">From:</span></strong><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">
                          <a href="mailto:[email-masked]"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a>
                          &lt;<a href="mailto:[email-masked]"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a>&gt;
                          <br>
                          <strong><span
                              style="font-family:&quot;Arial&quot;,sans-serif">Sent:</span></strong>
                          03 May 2023 20:56<br>
                          <strong><span
                              style="font-family:&quot;Arial&quot;,sans-serif">To:</span></strong>
                          <a
                            href="mailto:[email-masked]"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a>;
                          <a href="mailto:[email-masked]"
                            moz-do-not-send="true"
                            class="moz-txt-link-freetext">[email-masked]</a><br>
                          <strong><span
                              style="font-family:&quot;Arial&quot;,sans-serif">Subject:</span></strong>
                          AW: [Healeys] Spark plug gap<o:p></o:p></span></p>
                    </div>
                  </div>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Spark
                      plugs are designed and tested to be used with the
                      gap given by the producer of the spark plug.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">When
                      you widen the gap the plug gets hotter as it is
                      designed for and the electrode can melt or wear
                      very fast.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Its
                      a very short win you gain modifying them.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">I
                      never understand why people think they are better
                      engineers and know better than the designers of
                      the system they use.</span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Josef
                    </span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> </span><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"><o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">-----Original-Nachricht-----<o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Betreff:
                      [Healeys] Spark plug gap<o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Datum:
                      2023-05-03T21:39:57+0200<o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Von:
                      "Simon Lachlan via Healeys" &lt;<a
                        href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>&gt;<o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">An:
                      "'Healeys'" &lt;<a
                        href="mailto:[email-masked]"
                        moz-do-not-send="true"
                        class="moz-txt-link-freetext">[email-masked]</a>&gt;<o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <p style="margin:0in"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                  <div>
                    <div>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">I
                          run my MkII BT7 on NGK BP6ES which were
                          recommended by some of the wise ones on this
                          list.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">The
                          car has a “Sports” coil and a 123Ignition
                          distributor. DW fast road cam…etc<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Now,
                          talking of “recommended”, the rolling road
                          guys told me to set the plugs at 0.028” and
                          pooh-poohed anything bigger when I suggested
                          that I’d heard of much greater gaps with my
                          approximate setup.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">So,
                          I went with 0.028.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">The
                          other day, I decided to experiment and set my
                          spare set at 0.032”. Same NGKs, no mileage on
                          them..decent plugs. Anyhow, it made a very
                          surprising difference. All round performance
                          is much enhanced.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Despite
                          it’s 3:54 diff and 28% OD, it was never
                          sluggish on our local hills. But now it fairly
                          zooms up them.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">To
                          be frank, all a bit of a surprise.<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Not
                          boasting…just putting that out there in case
                          anyone else is thinking of going up a few
                          thou…..<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">When
                          I asked about gaps a few years back, some of
                          the suggestions were near 0.040”. Surely that
                          a bit much?<o:p></o:p></span></p>
                      <p class="MsoNormal"
                        style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black">Simon<o:p></o:p></span></p>
                    </div>
                  </div>
                  <p class="MsoNormal"
                    style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
                </div>
              </div>
              <p class="MsoNormal"
                style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:9.0pt;font-family:&quot;Arial&quot;,sans-serif;color:black"> <o:p></o:p></span></p>
            </div>
          </div>
          <p class="MsoNormal"> <br>
            <br>
            <o:p></o:p></p>
          <pre>_______________________________________________<o:p></o:p></pre>
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          <pre><o:p> </o:p></pre>
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          <pre><o:p> </o:p></pre>
        </blockquote>
        <p class="MsoNormal"><o:p> </o:p></p>
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