Quote:


That's a correct statement, everything the same (ports, valves, combustion chamber), an iron head will make more power.

It takes about a 1 point increase in compression, with everything else the same, for aluminum heads to make the same power.



Where's the proof on that? I'd be very interested in reading it because the only article I've ever read where they tackled this subject on the dyno showed no change in power output between the two materials, everything else being equal...