I've narrowed my cam choice down to two cams for my 454 Mag MPI (Gen VI):
1. GMPP #24502611: 211/230 duration@.050"; .511/.540 lift; 112deg LSA.
2. Comp Cams 01-414-8-112: 218/224 duration@ .050"; .511/.511 lift; 112deg LSA. (This cam was recommended to me on Comp Cams' hotline.)
On Dyno 2000, these cams produce almost IDENTICAL power curves. The GM cam is about 5 lbs-ft higher from 2000-3500 rpm and peak power is about 6hp higher at 5000rpm. Obviously, these numbers are too close to assume that Dyno 2000 is dead-on accurate. Based on your experience, would you choose one of these cams over the other? Does Comp Cams tend to have faster opening and closing flanks than GM, which might generate more power but not show up in the numbers? Any problem using the stock valvetrain with either cam? Any other advice?
One more note, Dyno2000 shows that the Comp Cam has no overlap (-3.0 deg) and the GM cam has -3.5 deg, so I'm assuming water reversion should not be a concern.