[Tigers] Starter Solenoid

[Tom Witt]

If you are NOT running the Pertronix coil then you need to continue to use resistor associated with the coil you have. They are considered a match pair.  What one needs to be careful about is what side of the resistor the connection is made. As illustrated below the red wire from the Ignitor goes BEFORE the resistor and gets the full 12 volts. 

I realize some have been able to go to the low side of the resistor and still get the system to work.  I recall the rated working voltage of the Pertronix is 8 or 9 volts up to 12 volts and I presume they are able to ‘get by’ wired that way.  But from what I have seen on other sites that is not always the case.  I believe that IF you are using the Pertronix coil it is  true 12 volt coil with no external resistor. In that case the + side of the coil would not be an issue for the red wire connection point as it is getting the full 12 volts. Hence why some Pertronix instructions say to connect to the coil + terminal.

FWIW, I have the Ignitor I on a SBC using the original coil. The ignition switch (run position) feeds the original harness, through the resistor, to the coil.  I have the red Pertronix wire lengthened and connected (also) to the ‘run’ side of the ignition switch as a dedicated connection.  I have been running it this way for 7+ years and have an “old school” Sun tach that does not exhibit issues.



-----Original Message----- 
From: Gary via Tigers 
Sent: Thursday, November 21, 2019 4:56 PM 
To: Joe Brown 
Cc: Tiger Group 
Subject: Re: [Tigers] Starter Solenoid 

Pertronix may have changed their instructions but..
I bought one of the earliest Pertronix "points replacement" in about 1992.
Instructions then said the red wire goes to the coil - (low side of 
ballast).

I just looked at my car, it IS wired that way as it has been without any 
problem since about 1992.
Stock (and Theo's replacement electronics) tach have always worked 
perfectly and reliably.

So much better than points!   I bet most new kids now a days don't have 
a clue what those are!!
Gary W.


On 11/21/2019 2:27 PM, Joe Brown wrote:
> 3. I also discovered that I had the Pertronix wired up wrong.  The red 
> wire has to go to 12V and I had it on the battery side of the coil 
> (which is only 7 or 8 volts when the engine is running).
>

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