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<DIV>Not as I understand how the Pertronix works. At least the Pertronix I
(original). The Pertronix itself is wired to 12 volts + (usually at the
ignition switch) and operates continuously at that nominal voltage. The ballast
resistor is still needed because the coil, as designed, is associated with
it. This does not preclude that one may have an aftermarket true 12 volt
coil that does not need a resistor. But, if the coil is designed to have the
resistor then it is still needed. If the Pertronix is wired on the resistive end
of the stock circuit then it is improper and yes the voltage will drop with
potential problems. </DIV>
<DIV> </DIV>
<DIV>A common misunderstood aspect of the Pertronix is that it feeds the
positive voltage to the coil. No. What it is really doing is creating a
(momentary) path to ground just like a set of points does. Thus, the 12
volt + is not going through the Pertronix and triggering the coil. The 12 volts
+ is the necessary operating voltage to trigger the electronics to
momentarily ground the coil. In essence it is still an “old school” circuit
design with a modern method of triggering it. I too thought at one time
that the Pertronix was a 12 volt + coil triggering device. But, when it came
time for me to install it I was set straight after reading the
instructions.</DIV>
<DIV> </DIV>
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<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=tigers@autox.team.net
href="mailto:tigers@autox.team.net">Mark Rense via Tigers</A> </DIV>
<DIV><B>Sent:</B> Tuesday, October 17, 2017 3:31 PM</DIV>
<DIV><B>To:</B> <A title=tigers@autox.team.net
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A> </DIV>
<DIV><B>Subject:</B> Re: [Tigers] Pertronix Ignition</DIV></DIV></DIV>
<DIV> </DIV></DIV>
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style='FONT-SIZE: small; TEXT-DECORATION: none; FONT-FAMILY: "Calibri"; FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal; DISPLAY: inline'>
<DIV>
<DIV>Of course if you are running a Pertronix or other electronic ignition then
there is no ballast resistor. If you have one when it gets warm you are dropping
the voltage to the electronics down to a threshold triggering point which will
cause shutoff. </DIV>
<DIV> </DIV>
<DIV class=gmail_quote>
<DIV>On Tue, Oct 17, 2017 at 12:44 PM Jay Laifman via Tigers <<A
href="mailto:tigers@autox.team.net">tigers@autox.team.net</A>>
wrote:<BR></DIV>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV>Ditto on looking for the bad crimped connection. To my knowledge,
Petronix problem mode is simply total failure and done. No stumbling,
rough running, or spotty issues. </DIV>
<DIV class=gmail_extra>
<DIV> </DIV>
<DIV class=gmail_quote></DIV></DIV>
<DIV class=gmail_extra>
<DIV class=gmail_quote>On Mon, Oct 16, 2017 at 7:27 PM, Andy Walker via Tigers
<SPAN><<A href="mailto:tigers@autox.team.net"
target=_blank>tigers@autox.team.net</A>></SPAN> wrote:<BR></DIV></DIV>
<DIV class=gmail_extra>
<DIV class=gmail_quote>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<DIV lang=EN-US vlink="purple" link="blue">
<DIV class=m_4454871711482697308m_-8878542603103993098WordSection1>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>James:
<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>I
read your post and Ron’s answer regarding the possibility of a problem with
the ballast resistor. I have experienced the same issue that you are
having, only mine was with a standard point-type ignition. The car
would run just fine with no hint of a problem; all of a sudden, it would
quit just like someone had turned off the key.
<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>As
it turned out in my situation, however, it wasn’t the resistor that was the
problem, but the wiring connecting to the resistor. The previous owner
had done some wiring work and had failed to crimp the connector down on one
of the wires coming from the ballast resistor. The end result was when
the wiring and resistor would heat up, the wire would arc off the connector,
thereby shutting the ignition down instantaneously. Once it cooled
off, the wire would lay back down into position and it would start back
up. Moral of the story…check all of your connections in the ignition
circuit for loose wires or bad connections before getting too far into other
things. It very well could be as easy as
that.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>Keep
us posted,<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>Andy
Walker<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'>Edmond,
OK<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif; COLOR: #1f497d'><U></U><U></U></SPAN> </P>
<DIV>
<DIV
style="BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; BORDER-BOTTOM: medium none; PADDING-BOTTOM: 0in; PADDING-TOP: 3pt; PADDING-LEFT: 0in; BORDER-LEFT: medium none; PADDING-RIGHT: 0in">
<P class=MsoNormal><B><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif'>From:</SPAN></B><SPAN
style='FONT-SIZE: 11pt; FONT-FAMILY: "Calibri",sans-serif'> Tigers
[mailto:<A href="mailto:tigers-bounces@autox.team.net"
target=_blank>tigers-bounces@autox.team.net</A>] <B>On Behalf Of </B>James
Burruss via Tigers<BR><B>Sent:</B> Monday, October 16, 2017 2:35
PM<BR><B>To:</B> <A href="mailto:tigers@autox.team.net"
target=_blank>tigers@autox.team.net</A><BR><B>Subject:</B> [Tigers]
Pertronix Ignition<U></U><U></U></SPAN></P></DIV></DIV>
<P class=MsoNormal><U></U><U></U> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'>On a Saturday
drive, my Tiger’s engine shut off instantly as if the ignition key had been
turned off. It would not restart. I suspected that the car’s
Pertronix II ignition had died, as they have been known to do. Mine
had been reliable for several years, although the car is not driven often
any more. I had the car taken home on a
rollback.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'>This morning, I
began a series of checks. I ruled out the ignition switch as a
possible culprit because the starter, gauges and fuel pump all worked.
I checked the wiring connections, coil resistance, voltage to the coil, and
even fuel in the carburetor; all were fine. So I connected an
induction timing light to confirm that there was no spark – except that
there was! Then I got in the car and started it. It ran
fine.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'>Which brings me to
my question for those who have experience with these ignition systems:
Are they known to become intermittent due to heat? Saturday was a warm
day, mid-80s, the car had been driven moderately for about 10 miles and its
temperature was normal. Needless to say, I no longer trust this
system; but I would appreciate knowledgeable comments and/or recommendations
for a replacement ignition for a stock 260.<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'>Many
thanks!<U></U><U></U></SPAN></P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'><U></U><U></U></SPAN> </P>
<P class=MsoNormal><SPAN
style='FONT-SIZE: 13pt; FONT-FAMILY: "Arial",sans-serif'>Jim
Burruss
<U></U><U></U></SPAN></P></DIV></DIV><BR>_______________________________________________<BR><BR><A
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