Quote:
Originally Posted by cgeise
I still stand by the statement - a smaller oval port - as compared to a square port -- wil flow better - read more efficient ,than a square port - there is less velosity gradient in the oval than the square port - so - IF DONE CORRECTLY - a smaller oval will perform the same as its larger square brother.
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I agree. An oval port of the same CSA will outflow a rectangular port. That is not to say a square port can't be made to flow well. Given the valve geometry, architecture and size of the engine ( Big Bore Strokers) you sometimes have no other choice but to make the ports square to get the needed CSA for large or high RPM race engine. BBC guys know this all to well trying to feed a 632 cu in with 24 deg heads.
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