Can't tune tank movement (physx)

Im trying to tune physx setup for my tank like vehicle, whatever settings Im trying (tire, wheel, engine, etc) vehicle speed in forward direction is slower then when adding a little turn force by setting thrust to just one side of tank (in forward direction thrust is added to both sides). Acceleration is turned on in both cases.

Any advice?

(Tank support added by modification of 4W vehicle and Tank snippet from Nvidia SDK using c++)

I have already quite good progress on that by tuning wheel damping rate to some huge values

Having the same issue. I had it sort of fixed by setting damping rate to around 10.0. but it may generate other side effects. I’m wondering if you had found out other better fixes, or figured out what actually caused that weird behavior?

I also have some issue finding a proper friction value for the tire. If I set it too high the tank can’t turn in place but if I set it lower then it drifts too much when turn in high speed. Just couldn’t find a sweet spot where it works in both situations.