C.I.D x MAXRPM/3456 = Carb size @ 100% volumetric efficiency.
If you are shooting for a known amount of power then the formula is
1.6 x HP = Airflow needed
Or another way of saying is 1 hp requires 1.6 cubic feet of air to generate.
My not so handy HP sim says your in the neighborhood of 440 to 450 hp with your current setup with a peak VE of 101%
the closest models I have are a set of Windsor SRs and A Xtreme Energy cam (35-522-8).
Is your cam a hydraulic roller, solid roller, hydraulic flat tappet, solid lifter?
Hydraulic rollers are heavy and limit the RPM potential of the engine (my bet) I have a brand X with a 650 mech DP and solid roller with VERY HEAVY springs (to heavy in fact), the car doesn't break up, it just revs to 8500 rpm and stays there until you lift off of the gas! I had a Vic Jr on it 3 inch exhaust and a 750 mech dp so it used to rev higher (seen 9000 on the tach), but the cam was a mild 278 degrees adv and I used 1.6 rockers with an .025 lash so it had a net lift of .567 and was probably 278 or 280 deg adv on duration
Anywhosit by changing to a 1-3/4 header your can get into the 450-460 hp range and your VE jumps to 102%
306 x 7000/3456 x 102% = 632 cfm by Holley's math or 460 x 1.6 = 736 cfm based on hp
|