Point taken as I know they didn't spend much time tuning any of the combo's.He says he has another 428 with the same problem(leaky exhaust valve) and he's doing a before and after dyno test so that should show how much it hurt this motors dyno numbers.On 2006-03-28 09:24, My427stang wrote:
The issue wasnt total HP, it was comparing manifolds. It was a nearly bone stock 428, dont let the numbers draw you off intent. The issue is that the "best" intakes did poorly, and the "worst" intake by FE guy standards did the best by significant numbers.