I'm no head porter and know little about porting and flow but I have a question. Let's say you have a camshaft with .640 lift. WHY do flow numbers at say .300 even matter? Help me understand.
If you have a .640 lift cam first of all you have to subtract lash and deflection so let’s say you have a .615 lift cam. How many times does a cam hit .615 each cycle. How many times does it hit .300, .400, .500 each cycle.