DIM Electronic Advance Ignition

I really appreciate your comments. It is a lonely job doing this work, and finding those that understand.

Dan,
My first car over 40 years ago was a /6 Dodge Coronet. I built an electronic ignition for it in 1972 that used an optical pickup and a built from scratch CDI system. I will get to the /6, I still have a distributor, but no /6 car it this time. You may be the first to do testing if you wish.

To the best of my knowledge the heart GM module is analog. I am talking about the dwell control circuit. The circuit is fairly well documented made by Moto. Recently internal circuit components have become obsolete to the general public. I am an old analog guy, after learning about micro-controllers 20 years ago, I switched. The smarts of a micro-controller, win in control. The GM module by its self does not do timing control without mechanical means, or ECU intervention. My circuit is an ECU. That is the major difference.

67Dart273,
I have the phasing issues figured out. Base timing of 10 degrees, yields a total timing control over 50 degrees.

Testing is going well. My simulator generates signals for cranking at 200 RPM, and revving from idle to 6000 RPM in 4 seconds, then repeats.