FGear Vehicle Physics (v1.4)

Are the calculations correct?
imagen

I checked the cars and they use mostly the engine curve with max 9k torque. Some have the limit changed to 6k or similar and match with the calculations, but for the LimitRPM with 9k , calculation says max is 7985.

So, are calculations correct and i should set the limit RPM to max 8k? or 9k, 12k… will be fine?