Using a micro 4/3 camera is like using film, no spray and pray.
Both my cameras, the GH-1 and E-P1, the screen blanks in burst mode after the first shot.
So the only way is to use single-shot and time each one.
Not just that, but the AF is too slow to focus on a race car.
So I have to prefocus on the track and use my technique to get the shot.
It can be done, even at 1/320 to get the wheel blur.