Quote: Aside from that, teh Maggie head benefits from 30 years of design improvements relating to efficiency, HP (stock vs stock, per CID of engine), reduced emissions, and detonation resistance. Not a fair comparison at all.
technologically speaking, i'll stick with my aluminum eddy performer rpm's on my 400. higher compression, perfect quench, flow better and are even more detonation resistant than the magnum heads.
higher compression ratios burn the gas more completely (thus more power for the same amount of gas).
p.s. the magnums came out around 1992. i think the eddy's came out around 2000.
