In fact even for real car, if you apply sudden brake when you are racing at high speed, you car can spin. A lot of factors count:
1)Steering.
If you try to turn right or left at the same time when you apply brake, of course the car spin. for the same reason, if the setting of your car isn't neutral, say the front wheels slightly tilts to one side, your car can spin when you apply sudden brake.
2)Traction.
This depends on the friction between the ground and your left and right tyres, in turn depends on the conditions of the track and your tyres/setting. Say the traction of the right side is higher, then you car may spin to right when you apply sudden brake.
3)Weight balancing of your car.
If the left side of your car is much heavier than the right, you car may spin to right when you apply sudden brake.
I think there are still a lot of other factors, the above is just my two cents |