Go to Controls and search for the Shift up/Shift Down. Then learn where are Shift up/DOwn, then go to that Drag Race.
When it will be green (START) push forward and accelerate, it will appear in the center of the scrren whant to change the speed it is better to change when it`s green.
Carefully, if you shift up your speed very quick your car won`t accelerate, if you don`t change your spped your engine will gonna blow.
These were my favourites races.