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General Car Related Discussion.To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.
Why's that Gary, they flow pretty well as standard don't they, 400 odd BHP for the black top?
because unlike the oil pump theres nothing you can do about it . its the exhaust ports that are the problem try to go big on them and your into the water ways. that imo is why we have never seen 700-800hp from them.
Ah I see, not really a problem for the average ZT build though! lol
no lol, just a big shame ford left the exhaust ports same as blacktop when they cast the ST170 head with perfect inlet ports for really big boosted power