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<p>re: "... I don't think a connection between the coil and chassies
is a good idea ..."</p>
<p>Not only is it a good idea, it is required for a Pertronix
installation. A points system grounds the coil to the
chassis--indirectly--through the points, the 'little “boot lace”
wire,' the distributor body and the engine. To use the
ubiquitous water analogy, the points are 'downstream' of the coil,
and the grounding is necessary to allow current to flow through
the primary winding of the coil when the points are closed. A
Pertronix switches current 'upstream' of the coil; so the coil has
to be grounded with a separate wire which passes current to ground
(the chassis). <br>
</p>
<p>In a points system, the coil is 'permanently' grounded by our
friend the Trusty Cutoff Switch in the boot when the switch is in
the 'OFF' (don't run) position. You can retain this 'anti-theft
feature' with a Pertronix by using the wire from the coil to the
cutoff switch--white with black trace IIRC--and re-wiring the
switch so that the coil is NOT grounded when the switch is in the
'OFF' position. This will prevent current flow through the coil
regardless of whether the Pertronix is in the on or off state.
This only requires knowledge of which terminal is which on the
switch, and a couple of the terminals on the wiring have to be
replaced since the terminals on the switch are different sizes.
Note you have to move the wire on the coil as well (which should
instigate the '+/-' vs. 'SW/BAT(?)' coil markings discussion ;)<br>
</p>
<p>As for the 'boot lace' wire inside the distributor, in theory it
MAY not be needed, as the Pertronix is, in effect, a SPST
(single-pole, single-throw) switch, and the unit is solid state
(duh--that's why we like them), but the transistors etc. in the
Pertronix probably need a ground reference provided through the
base of the unit. I'd leave it in.</p>
<p>Cheers,</p>
<p>Bob<br>
</p>
<br>
<div class="moz-cite-prefix">On 12/20/2016 6:39 AM, Per Schoerner
wrote:<br>
</div>
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cite="mid:4B7A0D30-3EE5-4858-AABE-7362633D654E@schoerner.se"
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<div>Simon</div>
<div id="AppleMailSignature">I have ordered two positive ignitors,
one for me and one for a friend. So if you wait a couple of
weeks I can probably give you an answer. However, I don't think
a connection between the coil and chassies is a good idea,
unless the other terminal on the coil is connected to somewhere
that is NOT connected to the battery directly. Normally you
know, one terminal is connected to the ignition key and the
other is connected to the points.</div>
<div id="AppleMailSignature"><br>
</div>
<div id="AppleMailSignature">Per<br>
<br>
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