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So I see that the FHO stageV cnc ported heads flow 435ish, my stock replacements stageV only flow 365 at .600, does that make much difference in power? Tim

If you use the old formula of 2 HP per CFM that is 140 HP, correct I've seen that on swapping wedge heads with the same combustion volume on the same short block with no other changes. Actually on the higher compression motors that I did the same swap on with the same heads, Indy SR M.W. compared to 440-1 CNC ported with 30 CFM differences the higher compression motor made more HP per CFM than did the lower pump gas compression ratio motor, not the same short block on both motors either IHTHs

Wouldn't that be an efficiency thing? Tim

1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta

I didn't do 4 years and 9 months of Graduate School to be called Mister!