Does tire size and gear ratio affect the dyno??
My buddy has an LS1 Trans Am, that dynoed at 380 HP at the rear wheels. (Heavy engine mods, T56 tranny, 3.42 gear). He just got the Holley LS1 intake manifold and a ported throttle body put on. He also got a 4.10 rear installed and I believe a little bit taller of a tire. It dynoed again at nearly the same as before, actually a tad bit less. I would of thought for sure the intake would have helped tremendously, considering he has a different cam and heads than stock. So my question is, can the tire size and rear end ratio have an effect on the dyno results? If so, how? Thanks in advance.
355, AFR 195cc heads, Comp 230/236 @.050 cam, Edelbrock Victor E EFI manifold, FAST MPFI XFI 2.0, 39 lb/hr injectors, MSD 6AL ignition
Pro-Built 700R4 trans, Strange 3.73 posi rear, Spohn sub frame connectors, lower control arms w/brackets, adjustable torque arm