Re: Optimal ignition timing curve?
I think your timing curves are almost spot on. Consider haw the engine runs when your driving it. At idle you have max vac adv and minimum mech adv OR 3/4 M and 8V this is giving you 12 degs adv. Whicjjis about right for idle. Now the minit you spep on the throttle you loose the vac, which is normal in a standar system. but you do not have a accelorator pump it inrichen the mixture off idle. However as the rpm increases to 2000 rpm your ignition also advances to the max 18/20. I've been dreaming of a system like this for years ans have a megsquirt system for a GM throttle body a unit I built back in the 80;s but never got to work with the original computer.
Can you read your AF as this operate??
Gramps
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