My 1990 Gt is 3300 lbs and has dual flowmasters mac cold air intake . and best run was a 15.81 .........whats the proble?
astronut1885 said:That's major short shifting, because it's lower than your powerband peak, and the stock tach is very inaacurate, so odds are you were shifting between 2900-3900. That's too low, that's almost like street driving. You want to push the car hard on the track. I'd say to shift around 6500 by the stock tach, which will be about 5000 (I know, because at the dyno my stock tach was saying 6500 and I was at 5000 according to their much better equipment.)