The TORCS Endurance World Championship 2008 is set up and will be ready for signing in tomorrow. The required packages (TORCS-1.3.1 and trb tracks addon package) are not yet ready, this will still take some weeks. You can get the cars and tracks from the CVS till everything is ready. There are a few changes in car physics of 1.3.1, namely the anti roll bars will be functional, the wheel mass is considered in the suspension movement and a rolling resistance bug has been fixed.
The differences of the final car performance is quite small, so you can start the development from the CVS version or from version 1.3.0. For 1.3.1 you have to adjust the the suspension settings then.
So, I hope to meet you on the track and that you enjoy the 2008 season.