What's brake drive? You mean brake DIVE? Like when you hit your brakes the front end dives down real hard? To see if your shocks/struts are bad, push down firmly on the front (or rear) of the car. It should spring back up and stop, if it bounces up and down, then the shocks are weak. Also, if they're bad, then on the highway the front end will "float" (rise and fall with the bumps) excessively. As for drag racing, I think springs are more important than the shocks/struts. But that's about all I know. Hope this helps.