This Pertronix II has been giving me fits since I installed (on two cars). Same issues on both cars. Fires up on cold engine fine. Runs rough after warming up and a real bitch to start when warm/hot. All my research shows the issue(s) are the resistor in the Ignition wire. So to keep this "Clean", I am opting for the Relay configuration.
Here is my question to all you professionals.
Should I use a SPST (Single Pole Single Throw) or, SPDT (Single Pole Double Throw)?
I plan on going direct to the constant power on my solenoid fuse that is hooked up to my single wire Alternator.
How long is the actual resistor wire and did you just splice into the wire ahead of it? I installed a relay for the same reasons since my MSD distributor really wanted 12V. But now, of course, my rally pac won't work and I need to either run a new wire or do this bypass.
On my 66, I have a fused #10 wire switched by a relay (SPST) feeding an aux fuse block. I unplugged my pink resistor wire from the bullet connector off ignition switch and connected the relay to ignition switch. I ran a #12 wire off the new fuse block to my HEI and a #14 to my electric choke. They both get a excellent source of power and work great. No voltage drop from all that factory wiring harness!
Finally completed the Relay installation this weekend for the Ignition Switch to Coil. So far so good. The car starts right up on both cold and hot engine easily. I need to do more testing after a hot Texas day. This may be the trick...
And LOCALFIEND- Thanks for the links. I used those and purchased a Relay that could tolerate water. Figured being under the hood, it would be useful.
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