Quote:
Originally Posted by Blue Thunder
I launch at 5500 rpms and i dump the damn clutch completely cuz it launches like a friggin rocket i'm talkin no tire spin whatsoever. I dnt really care if you believe my previous track times i'm not here to boast fake times i'm askin for help so why would i lie? Whatever anyways the drs are 275 width and i wanna say 28" tall on a 15" prostar, but i'm not sure all i know is they barely fit on the car. I don't feel like i need to slip the clutch or anything conservative like that because the tires aren't spinning at all. Whatever though please keep the help coming. thanx!
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if you're going to use a 28" tall tire you should switch to 4.30 gears. If you can, swap out the 28" tires for a set of 26" tall tires. I remember when MM&FF was testing the GT500 they found the 28" tall tires added to their ET's.
If you have adjustable upper arms, you'll want to take a pinion angle measurement and then adjust in very small increments to get it to the sweet spot for your track. Usually lengthening the arm by a turn or 2 is sufficient to make a noticeable change on your launch. Adjust once, run twice. Rinse, repeat. You're looking to nose down the pinion a hair at rest so that after you dump the clutch and the diff torques upwards it ends up flat and level.