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Mine went 520cfm at 1". They are wedge heads fwiw.


That's about average.... Mine flow 541cfm on the intake @ over one inch...375 cfm on the ex. They have been to a few places for port flow, velosity improvement..been told there is prob. Ten more cfm in them on the intake
Tony



Tony do you race in Pro Gas?
I just finished an engine for Matt from Kriptonite Marine and I believe he runs Pro Gas.

Anyway who did the work on your heads?
Mine are CNC ported(460)from Indy and they say 510cfm but I want somebody to that can get me 530cfm to make sure the engine makes the power I need.