Irrlicht Engine

We have included Irrbullet in our project to do the physics for our vehicles / objects.

I added wheels to the vehicle and can drive it around but its really jumpy / bumpy even when standing still.

Can somebody tell me how to tweak the wheel settings of irrbullet to have my vehicles drive more realistic??

It might be a good idea to post this in the irrBullet thread over at the Project Announcements forum, your question will get more attention there