Originally Posted by
weldmatic
i dont even think youd get 30 hp from a port and polish honestly...... granted it might flow better but think about it..... the stock valves are there.
I wish I had graphs to show you gains but I don't.
And 30whp isn't hard to gain from a turbo setup.
NA yes.
It depends on his power levels. On cars making 600 horsepower(with stock valves mind you) there have been major gains from changing heads.
Simple answer to the OP, turn up the boost a couple more PSI. It's not worth it.