My peak HP was made at 5500 rpm, with peak torque at 3750.
I gain 1mph and 2tenths shifting at 5500 instead of 5900.
So I think you really need to shift lower.
Skyler
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-1989 Saleen Mustang #406-
TFS TW Heads, E-303, Edelbrock intake, 70mm TB, 73mm MAF, 24lb injectors, 1 5/8 shorties, Off Road H, 3 Chamber flows, Jaz Race seats, Back seat removed, sub-frames, Roll Cage, and a 80 shot of N20.
12.55@107 Motor