I use an LS9 on a drift car, the stock rev limit settings are very unsuited for drifting as it's very slow & has a some sort of a delay logic, it's like you lift of throttle for 1-2 seconds & that kills the car's momentum as the car drifts at full throttle. I heard about a remedy for this specific issue, can someone please list the steps needed to improve the rev limit?
I really appreciate your help