Phil99vette

iTrader: (11)

Lets say that you have 2 cylinder heads...
Head 1)
200CC runner
flows average 225cfm across the board

Head 2)
230cc runner
flows average 258cfm across the board

Head 3)
250cc runner
flows average 280cfm across the board

Which head would you run? What would be the differences in these heads since they have very similar CFM to CC flow #s?
Phil

v8pwr

iTrader: (19)

Phil , we need more info . What is the intended application ? head #1 wouldn't work very well with rpms unless it's a small motor and #3 obviously wouldn't be used in an automatic street car .

jrp

iTrader: (16)

exactly

SStrokerAce

iTrader: (2)

Throw in on that the port length so you can have an idea of the average cross section of the heads..... let alone lets make sure we know the cubes and the RPM range.

Basically there are a lot of things I would look at over this than just average CFM and port volume. IMHO average cfm means crap anyways.

Bret