Hello. I tested your car on different tracks and there is my conclusion about it:
It doesn't turn at all. The only point of this car is go forward. And even then it does spin off often. Also it does have a problem with brakes. So it is really hard to control. I could test it only on straight tracks, even thought it was really painful to me.
To control it I used: start on idle 1 st gear, 2nd gear on 5-6k rpm and rest of the gears on 8k rpm. Also I upshifted a lot to not spin off.
Overall car design is crafted well, i really like it. Just it's designed to be top speed car.