That's because you are having harmonic vibrations. If you do a launch whit a lot of spinning on cold tires, the air inside expand while the tires heat up. This expansion cause wheel deformation and vibrations (See the rear wheel in a drag racing car launch)
To minimize, try preheating your tires running a few errands, and/or using nitrogen, and/or adding a few extra pounds and/or steeping down on the gas.
actually TRACTION BARS ARE FOR OLDER CARS WITH LEAF SPRINGS. WHILE THEY WILL HELP WITH WHEEL HOP THEY KILL THE SPRINGS ABILITY TO HOLD THE TIRES IN CONTACT WITH THE ROAD.
SO MOVING ON IT DOES NOT MATTER WHAT TYPE OF SUSPENSION WE'RE TALKING YOU NEED TO IMPROVE THE SPRING RATE!!! AND A BETTER SHOCK!!!
generally the axle 'winds up' from torque and gets in a rythm .. air shocks may stop it, if not traction bars stiffer springs ect ..
Stronger springs and shocks will help.
When I do a burnout or a launch when I spin my tires the rear end of my car jumps up and down. What causes this and how can I prevent this from happening?
