Help on 340 combo
Hi there,
Well one thing is for sure. The car is squatting which in effect pulls the tires up off the payment causing tire slippage throughout your run. I assume your springs are multileaf, stock or super stock? The rear leaf springs should cause the rear of the car to rise not squat. The front of the car should not rise above the rear which means that the body as a whole should launch level. A level body also applies when the shocks are at full extension. Use shock extensions in the rear to avoid limiting lift travel. The rates at which the front and the rear of the body rise during launch can be controlled by the shock setup. Rebound control is very critical. Leaf springs, whether stock or superstock type, should be replaced annually or 100 runs which ever occurs first. Record your ETs watch when they begin to fall off. The pinion snubber is critical for counter acting axle housing wind-up; placing a hole through your floor too. And for heaven's sake, don't use torsion bars at the rear axle on a Mopar. That's why Chrysler HP suspensions were heavy duty, multi-leaf type so that torsion bars were unnecessay. The only benefit of using torsion bars on a Mopar is to crack the rear axle housing if the car locks up hard enough.
Anyway, good luck.