Quote:
Originally Posted by mgarblik
This may not be the answer you are looking for. But a mentor of mine when I began tuning and working on engines 40+ years ago, had this to say. "The engine will tell you what it wants, you have to be smart enough to listen to it and respond to it's voice". I have always kept this in the back of my mind whether tuning a stock engine or our nitro funny car engine. And it's true.
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Very true.
I'm having the same problem with my 72 car.
It doesnt like full vacuum. I tried everything; adjustable vacuum can to reduce the amount of vacuum at idle, idle speed, mixture screws, more timing, less timing. Its a mild cam, around .450 lift. 18" of vacuum at idle.
Nothing works with full manifold vacuum. So I unplugged it, and it runs awesome with no vacuum advance at all. So be it. I wont waste time messing with ported vacuum. I know its benefits, but for now, no vacuum advance is what she likes.