Maybe there's no shock at all!?!?!??!!? As I said, the suspensions on those cars are really screwed up.........intentionally!!!!
Once they finally get going, under power, god forbid anything gets sideways or breaks.
Kind of like the early '70s when the wheel standers had those sparking skid plates and kept it on 2 wheels for the quarter. Great crowd appeal, but extremely dangerous. They had individual rear brake controls to "steer" the cars.