you might want to just stick with the 15t pinion. i know on mine when i had the ae kit on it ran 140 with a 16t pinion and that was with a 2650kv cc motor and 4s 30c lipos. Right now i have the tekno kit on with the clutch and it runs at 130 with a 17t bell on it.
how long is the motor.
also i did not even run a heat sink.