Re: advance curves
After testing a few hundred crabs and helmets . It appears that the factory advance does in fact come in very early right off idle and all in at 2000-2500. The Ford bulliten books show a early advance curve as well. The rpm band of a flathead is so low i just figured thats the way Henry wanted it???
I hear guys talking about spark knock or ping with a flathead , thats pretty hard to do with good fuel and low compression..
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