also look at the engine breaking. i dont recomend changing it, but if you do dont change it much. the engine breaking is how much the car slows down when you let off the gas, typically only a small adjustment is made otherwise the car will simple STOP and the back end of the car will go up in the air.
you can also change the weight transfer amount, and how the weight is transfered, again if you turn it up to allow the weight to be transfered to the rear ,, well guess what your car does wheelies .
over all just remember turn up the torque,, the turning radius, the grip of the tires, the torque RANGE and Transmission gears. and the turbo and turbo rpms min and max, also turn up the starting rpms and idle rpms,, that way when you take off from the starting line the rpms will not fall way down,, they will sty high and thus stay within a high torque range and turbo range and really great take off power.
sorry i dont use the same "names" that the ini does but im sure once you get into the ini you will understand what im talking about.
the 'Super Supra' was insane, fastest take off, super cornering, 0-150 mph in a VERY short amount of time, i just wish i could get the settings back,, i messed it up bad, lol.
it wobbled to much and i still havent been able to figure out what makes the cars stop wobbling.