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Old 10-23-2012, 09:11 AM
bygddy bygddy is offline
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Originally Posted by E.Furgal View Post

only way that is true is if you are looking at peak hp

you also left out other facts.. like factory heads flow compaired to aftermarket...
ya a 350 with heads designed to make peak power at 6500+rpm.. ya you'll need a 750
if he drives like most the 350 will be used 95% of the time from idle to 4000-4500, a 750 d/p is giving away torque.. and lots of it..
now a 750 vac 2nd thats different .

iirc a 350 would have to be 95% Volumetric Efficiency @ red line
redline being (in this exp 6500) to need a 750 cfm carb..
most mild builds that are not pro built are under 85% vol. efficience..
you'll find bottlenecks else where before the 650 carb becomes one..
I agree, but I wasn't discussing drivability, or pro built vs non pro built, I was simply suggesting, that the same motor, on a dyno, when tuned correctly, will make more power with a 750 vs a 570......
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