If you are a bracket racer, and run a three speed, your one/two shift is probably close to if not during the landing from a larger wheelstand. This not only affects the way the car tracks (moves around,etc) but the shift timing is affected because you are also busy worrying about the direction the car is going to go when it hits, etc. So taming the wheelstand, eliminating deflection in the front suspension to make it track straight, will go a long way to making you more consistent. A properly prepped front suspension,wheelievbars, and possibly double adjustable shocks will be a big asset.