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Now that I've had my first cup of coffee and am somewhat sentient I
recalled that Pertronix advises /against/ using stranded metal wire
secondaries with its Ignitor units. This made no sense to me because the
coil effectively electronically isolates the primary circuit the Ignitor
controls from the secondary, high voltage circuit (coils are sometimes
used in electrical circuits for this property). But, someone pointed out
the EMI from metal wires could adversely affect the Ignitor as it
employs a Hall Effect sensor to detect the rotation of the distributor
shaft (6-cyl Ignitors have a collar with 6 magnets, the 4-cyl units can
apparently detect the lobes from their shape and don't require the
collar, and there's likely little to no room for one anyway*). IOW, a
strong magnetic field could affect an Ignitor's ability to sense the
magnets or cam lobes. If the Pertronix people--who I've found to be very
knowledgeable and helpful--encountered this just a few times they would
likely issue a broad advisory against it (I suspect 95% plus of their
business is with the hot rod crowd, who likely use suppressor wires
because they're prettier). So, if you use a Pertronix Ignitor, use
non-resistor plugs and have sporadic misfires you could try using
resistor plugs. Offhand, I think most of the plug caps offered by
suppliers have resistors.
* When I first opened the box for my BN2's Ignitor I thought 'Crap, they
forget to send the magnet collar.' Then, I broke down and read the
instructions.
On 3/19/2023 6:52 AM, Michael Oritt wrote:
> "I always thought the resistor plugs were to introduced to suppress
> interference with car radios, which I donâ??t have,"
> -----------------------------------------------------
> They also eliminate your ignition's noise in nearby vehicles.
>
> Best--Michael Oritt
>
>
> On Sun, Mar 19, 2023 at 8:11â?¯AM m.g.sharp--- via Healeys
> <healeys@autox.team.net> wrote:
>
> I do exactly what Bob does with my BT7 except I use a non-resistor
> plug â?? Champion N12YC and 0.028â?? gap. I too use a Lucas Sports
> coil. I always thought the resistor plugs were to introduced to
> supress interference with car radios, which I donâ??t have, but I am
> happy to be corrected on that.  I think plugs are unnecessarily
> changed too frequently. I remove them once in a while (every few
> years) and clean and check the gaps. I run them until they shows
> signs of deterioration. I have never had a plug fail me in the
> Healey.
>
> Mirek
>
> *From:*Healeys <healeys-bounces@autox.team.net> *On Behalf Of *Bob
> Spidell
> *Sent:* March 18, 2023 2:17 PM
> *To:* healeys@autox.team.net
> *Subject:* Re: [Healeys] Plugs
>
> I've run over 150K miles on Champion plugs with nary an issue (and
> will continue to do so); RN12YC for the BJ8 and whatever the
> recommended is for a 100M (RN10C?). With Pertronix Ignitors in
> both, I run slightly over 'book' value (0.025") at 0.028" and both
> run very well (I also run stranded copper wire secondaries, so the
> 'R' is important, plus the plug caps have a resistor in them as
> well). My one-time auto shop teacher father maintained whatever
> spark was sufficient to ignite the mixture was adequate--mixture
> and compression took it from there--but a larger gap induces a
> 'hotter' spark which may be beneficial with leaner mixtures and at
> higher engine RPM (but has less margin as the electrode erodes). A
> larger gap requires the coil to produce more secondary voltage to
> jump the gap; a sports coil may be required to produce a
> consistent spark. 12K miles on plugs is fine in my experience--as
> long as the engine is in good nick--and they can be cleaned and
> re-gapped at least once. Sandblasting is a no-no as it will pit
> the ceramic insulator and can cause issues.
>
> I came across a YouTube video by David Vizard where he claims E3
> Diamond 'Split Fire' plugs produced slightly better mileage; yep,
> E3 makes a plug for Big Healeys (6-cyl only, I think). I've heard
> rumors that counterfeit NGK plugs are in the market.
>
>
> On 3/18/2023 9:49 AM, Simon Lachlan via Healeys wrote:
>
> Hereâ??s a can of worms that we havenâ??t delved into for a whileâ?¦.
>
> So, Iâ??m trying to get all my ducks in a row for a short run
> abroad. Car is a MkII BT7 with a DW fast road cam, 3 HD6s, big
> bore 6 branch and 123Ignition plus a so-called Sports Coil.
>
> 1. I was looking through my library of files on Healey topics
> and saw that we were all over the place on plug gapsâ?¦..all
> the way up to 0.035â??. So whatâ??s the opinion there??
> 2. And which plug? Seemed to be mostly between NGKâ??s BP6ES &
> BP5ES. Was a hold-out for their B8EGV 5627Â but thatwas
> dismissed fairly vigorously by Jeremy Welch as being way
> OTT for normal road use.
> 3. And, I have 12,000 miles+++ as plug replacement mileage so
> long as they still look and perform OK. Any thoughts?
>
> Thanks, Simon
>
> _______________________________________________
> Support Team.Net http://www.team.net/donate.html
> Suggested annual donation $12.75
>
> Archive: http://www.team.net/pipermail/healeys
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>
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>
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>
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Now that I've had my first cup of coffee and am somewhat sentient I
recalled that Pertronix advises <i>against</i> using stranded metal
wire secondaries with its Ignitor units. This made no sense to me
because the coil effectively electronically isolates the primary
circuit the Ignitor controls from the secondary, high voltage
circuit (coils are sometimes used in electrical circuits for this
property). But, someone pointed out the EMI from metal wires could
adversely affect the Ignitor as it employs a Hall Effect sensor to
detect the rotation of the distributor shaft (6-cyl Ignitors have a
collar with 6 magnets, the 4-cyl units can apparently detect the
lobes from their shape and don't require the collar, and there's
likely little to no room for one anyway*). IOW, a strong magnetic
field could affect an Ignitor's ability to sense the magnets or cam
lobes. If the Pertronix people--who I've found to be very
knowledgeable and helpful--encountered this just a few times they
would likely issue a broad advisory against it (I suspect 95% plus
of their business is with the hot rod crowd, who likely use
suppressor wires because they're prettier). So, if you use a
Pertronix Ignitor, use non-resistor plugs and have sporadic misfires
you could try using resistor plugs. Offhand, I think most of the
plug caps offered by suppliers have resistors.<br>
<br>
* When I first opened the box for my BN2's Ignitor I thought 'Crap,
they forget to send the magnet collar.' Then, I broke down and read
the instructions.<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/19/2023 6:52 AM, Michael Oritt
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAPTa0B4d9zNT-K9RtCorKiYdoL_w4fP5S3PkMRXuPVKiDUtSYA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)">"I always thought the resistor
plugs were to introduced to suppress interference with car
radios, which I donâ??t have,"</span><br>
</div>
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)">-----------------------------------------------------</span></div>
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)">They also eliminate your
ignition's noise in nearby vehicles.</span></div>
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)"><br>
</span></div>
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)">Best--Michael Oritt</span></div>
<div class="gmail_default" style="color:#3333ff"><span
style="color:rgb(34,34,34)"><br>
</span></div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Sun, Mar 19, 2023 at
8:11â?¯AM m.g.sharp--- via Healeys <<a
href="mailto:healeys@autox.team.net"; moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div class="msg4506245762485897014">
<div style="overflow-wrap: break-word;" lang="EN-CA">
<div class="m_4506245762485897014WordSection1">
<p class="MsoNormal">I do exactly what Bob does with my
BT7 except I use a non-resistor plug â?? Champion N12YC
and 0.028â?? gap. I too use a Lucas Sports coil. I
always thought the resistor plugs were to introduced
to supress interference with car radios, which I donâ??t
have, but I am happy to be corrected on that.  I
think plugs are unnecessarily changed too frequently.Â
I remove them once in a while (every few years) and
clean and check the gaps. I run them until they shows
signs of deterioration. I have never had a plug fail
me in the Healey.</p>
<p class="MsoNormal">Â </p>
<p class="MsoNormal">Mirek</p>
<p class="MsoNormal">Â </p>
<div>
<div
style="border-right:none;border-bottom:none;border-left:none;border-top:1pt
solid rgb(225,225,225);padding:3pt 0cm 0cm">
<p class="MsoNormal"><b><span
lang="EN-US">From:</span></b><span
lang="EN-US"> Healeys <<a
href="mailto:healeys-bounces@autox.team.net";
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">healeys-bounces@autox.team.net</a>>
<b>On Behalf Of </b>Bob Spidell<br>
<b>Sent:</b> March 18, 2023 2:17 PM<br>
<b>To:</b> <a
href="mailto:healeys@autox.team.net";
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Plugs</span></p>
</div>
</div>
<p class="MsoNormal">Â </p>
<p class="MsoNormal" style="margin-bottom:12pt">I've run
over 150K miles on Champion plugs with nary an issue
(and will continue to do so); RN12YC for the BJ8 and
whatever the recommended is for a 100M (RN10C?). With
Pertronix Ignitors in both, I run slightly over 'book'
value (0.025") at 0.028" and both run very well (I
also run stranded copper wire secondaries, so the 'R'
is important, plus the plug caps have a resistor in
them as well). My one-time auto shop teacher father
maintained whatever spark was sufficient to ignite the
mixture was adequate--mixture and compression took it
from there--but a larger gap induces a 'hotter' spark
which may be beneficial with leaner mixtures and at
higher engine RPM (but has less margin as the
electrode erodes). A larger gap requires the coil to
produce more secondary voltage to jump the gap; a
sports coil may be required to produce a consistent
spark. 12K miles on plugs is fine in my experience--as
long as the engine is in good nick--and they can be
cleaned and re-gapped at least once. Sandblasting is a
no-no as it will pit the ceramic insulator and can
cause issues. <br>
<br>
I came across a YouTube video by David Vizard where he
claims E3 Diamond 'Split Fire' plugs produced slightly
better mileage; yep, E3 makes a plug for Big Healeys
(6-cyl only, I think). I've heard rumors that
counterfeit NGK plugs are in the market.<br>
<br>
<br>
<span></span></p>
<div>
<p class="MsoNormal">On 3/18/2023 9:49 AM, Simon
Lachlan via Healeys wrote:</p>
</div>
<blockquote style="margin-top:5pt;margin-bottom:5pt">
<p class="MsoNormal"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">Hereâ??s a can of worms
that we havenâ??t delved into for a whileâ?¦.</span></p>
<p class="MsoNormal"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">So, Iâ??m trying to get
all my ducks in a row for a short run abroad. Car
is a MkII BT7 with a DW fast road cam, 3 HD6s, big
bore 6 branch and 123Ignition plus a so-called
Sports Coil.</span></p>
<p class="MsoNormal"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">Â </span></p>
<ol style="margin-top:0cm" type="1" start="1">
<li class="m_4506245762485897014MsoListParagraph"
style="margin-left:0cm"><span
style="font-size:12pt;font-family:"Times
New Roman ,serif",serif">I was looking
through my library of files on Healey topics and
saw that we were all over the place on plug
gapsâ?¦..all the way up to 0.035â??. So whatâ??s the
opinion there??</span></li>
<li class="m_4506245762485897014MsoListParagraph"
style="margin-left:0cm"><span
style="font-size:12pt;font-family:"Times
New Roman ,serif",serif">And which plug?
Seemed to be mostly between NGKâ??s BP6ES &
BP5ES. Was a hold-out for their B8EGV 5627</span><span
style="font-size:12pt">Â but that</span><span
style="font-size:12pt;font-family:"Times
New Roman ,serif",serif"> was dismissed
fairly vigorously by Jeremy Welch as being way
OTT for normal road use.</span></li>
<li class="m_4506245762485897014MsoListParagraph"
style="margin-left:0cm"><span
style="font-size:12pt;font-family:"Times
New Roman ,serif",serif">And, I have 12,000
miles+++ as plug replacement mileage so long as
they still look and perform OK. Any
thoughts?</span></li>
</ol>
<p class="m_4506245762485897014MsoListParagraph"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">Â </span></p>
<p class="m_4506245762485897014MsoListParagraph"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">Thanks, Simon</span></p>
<p class="MsoNormal"><span>Â </span></p>
</blockquote>
<p class="MsoNormal"><span>Â </span></p>
</div>
</div>
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_______________________________________________
Archive: http://www.team.net/pipermail/healeys
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