I'm just trying to figure out whats wrong with my car. In march of 09' the car did 131 in 4th gear with a 26" tall tire on the dyno, now in 2010' same dyno but different days the car will only do like 120 in 4th gear on the dyno.
I haven't change anything to the car drive line. Soooo what in the hell would cause this to happen?
I haven't change anything to the car drive line. Soooo what in the hell would cause this to happen?





Ron showed me the graphs and clearly I'm losing 10 mph.
2001 Trans Am All Motor 9.75 @139mph
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