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I bet you are seeing a combination of factors.
Fuel 87, 91, 93, other?
Full tank, total weight including driver?
Traction Control mode?
Shift points?
What gear were you in at the finish?
RPMs at launch?
Stock Pzeros, or drag tires?
Engine temp (cold, hot)?
adjusted or density altitude, at least air temp?
Your HP will get you to 110-115 at the finish and in the mid 12s on pzeros.
My automatic 575 hp ran 12.70s shifting on its own, stock pzeros, slp wheels, and t/c full on. I only have made two passes.
Data log will reveal any motor or driver issues.
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