Last Month the Japanese try to retrive this mod a little bit more. They played in the at 2pm CET. At the moment the gametracker,com Server Monitorring is off. Hope soon they turn it on. The ranking seems to work.
I think you would go about changing the torque and differential and spring strength all in physics.con I imagine these cars would be real slippery then you probably would want to change the handling on the terrain too.