I'm going to guess too firm in the rear with air in the shocks, I'll bet it doesn't wheel hop when you launch higher and spin. I think the car is hopping because of A) chassis "issues" and B) tire is half hooked so load unload load etc.
Good points.... Getting rid of the air shocks,might stabilize this. I wouldn't count on it Some rubber lay down pictures, would help,video of chassis in action,priceless.
