COP Ignition Development

I have not found much free time. I have had time to think about it, while working on other things. I am doing a DIY A/C system for my kitcar. That should keep me busy for a few weeks.

I converted the Barracuda back to the Mallory UniLite, and discovered the float level in the Rochester 2GV carb went high. I replaced the foam float with a new brass one, and wonder if a pop-back when cranking bent the float, or the brass was too soft from initial anneal for fabrication process. Brass work hardens, so it might hold after re-adjustment. I want to drive more as time permits, to evaluate float before testing the ignition again. I also want to change the starter to the mini and report on the crank current and RPM. The battery cable work has resulted in excellent starting of the Mallory, it springs to life on first cylinder it hits. The electronic will take a minimum of 2 engine revolutions. With second sensor I can get that to one revolution, still thinking on a scheme to reduce sync detection interval. My prior work has been ignition with EFI, it is easy to avoid over fueling when cranking, with cranking fuel settings. With a carb and choke, extended cranking (even the 2 revolutions) without fire seems to result in flooding. I am thinking about setting the choke open some, and relying on accelerator pump squirt for initial enrichment as needed. Or just pressing the pedal some for unloading on initial start.

The pop-back is ignition event happened at key-off when cranking. I have not had the problem with my other ignitions, so I did not implemented a soft shutdown. In doing research, soft ignition shutdown is a feature of modern integrated ignition drivers. I have done some design work, for ways to implement a cost effective, soft shutdown without the expense of integrated ignition drivers. I need to order some chips, write software, and make some hardware changes. My best hope is mid summer when it is too hot here for much outdoor work.