Quote:
Originally Posted by YouLikeThat
1.50 with a 15# launch. cargo springs, 1 airbag @22psi, lower control arms, boxed uppers,pinion snubber, front sway bar hooked up, M/T et drags at 12.5psi.
New set up HR bar, Stock springs, 2 air bags @ 3psi, no pinion snubber no front sway bar and and about 75lbs off the very front of the car (fiberglass bumper w/alum supports,alum radiator,remove front sway bar) NO TIME YET.
My Question is, what tire pressure is everyone running?
Thanks, Scott
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It really depends on the traction limitation you have with your setup. Run the most pressure you can get away with to lessen rolling resistance and provide better handling on the top end. When traction becomes marginal, lower the pressure to provide more of a contact patch at the launch. Lower pressures will also allow more of a wrinkle effect at the launch. This causes a change in the radius dimension from the center of the wheel to the ground which effectively lowers the overall gear ratio and gives you a little better launch. If the power at launch is high you could get too much wrinkle. With that, just raise the pressure a bit.
Most of the racers I know run between 8 and 10 psi, measured before the run. I run 9.25. I used to run 12, but traction was iffy and the sidewall wrinkle was light.