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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">
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<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 don’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
8:11 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 – Champion N12YC
and 0.028” 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 don’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.</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Mirek</p>
<p class="MsoNormal"> </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"> </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">Here’s a can of worms
that we haven’t delved into for a while….</span></p>
<p class="MsoNormal"><span
style="font-size:12pt;font-family:"Times New
Roman ,serif",serif">So, I’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"> </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
gaps…..all the way up to 0.035”. So what’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 NGK’s BP6ES &
BP5ES. Was a hold-out for their B8EGV 5627</span><span
style="font-size:12pt"> 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"> </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> </span></p>
</blockquote>
<p class="MsoNormal"><span> </span></p>
</div>
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