Still, I'm not releasing my current car physics code so let's see if he can ever produce any improvements on 'his' code :)
Got a point there but actually its quite easy to make improvements on car physics. Once you understand rigid body dynamics, you can do a lot. I played your demo and i have to say it has potential. Did you use vector cross products for the calculation torque around the cars axis. If you didnt then you really need to consider using as it can open up many new possiblies. Bottom line is that a physics engine is the best way to go but im not even going to get started with the current physics engines available for use with blitz because they all have problems.