Thread: What Size Carb To Use
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02-22-2007 05:02 PM #3
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Man I had to think about that one for a while.The 3456 is a constant - but darned if I know from where
one cubic foot = 12x12x12 = 1728 cubic inches per cubic foot.
One would think that is the conversion factor needed but -
At any given rpm only 1/2 the displacement is actually intake flow.
so you have to divide the total flow by 2 before converting CIM to CFM.
therefore -
CIDxRPM/(12x12x12)2 = CIDxRPM/3456Last edited by SBC; 02-22-2007 at 05:08 PM.
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