I put a 3.69 in my auto and had none of what you refer to.
Even on the stock tune, then on Ecutek.
So I am thinking it may be related to HP Tuners.
Wheel speed (mph) is determined by the wheel sensors.
Tire dia will alter the speedo but rear gears don’t.
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NA on E85 - 12.402 @ 112 mph
100 shot E85 - 11.589 @ 117 mph
JWT C2 cams rev Base Circle & Titan Valves
Last edited by SG4247; 08-07-2022 at 07:05 PM.
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