Megane RS V6 turbo [engine power default]

[francky380a380]

Hi, this is my new scene, a megane RS V6 turbo (in real life it's a 4 cylinders but I prefers à v6 )

But i have a problem (like in my all car scene!), the engine does not have enough power !!! I put a density normal (from 2 to 9) and a large displacement but the engine turn from 26rad/s to 10 rad/s in the 6th speed. WHY ??!!

In the scene:
s to start
a/z: shift speed
c: clutch
up: accelerate