Currently on the fence myself....
I'm currently in this same predicament myself with Sarah. I want to run a 27" tall tire, which both of my radials give me now. A 28" rear tire installed height will kick the rear end up, and I've always tried to have the car sit level. No nose in the dirt look for me. I have always run bias ply tires and always launched with high boost on production motor combos in the past. The stage motor was another animal all together. I've run 28x12.5" MT ET Streets, (basically a 28x10.5 slick with grooves, a DOT # and larger size number) on 15x10 rims on my old Limited. I would typically run 11psi cold and launch at 12-15psi off the foot brake/e-brake. Best 60ft was a 1.52. And I've run 28x10.5 ET slicks on the Grey car. I know the benefits of running a radial, but will I be able to launch just as hard to get the 60fts down enough to reach 11.30-11.20's? That is the big kicker for me. As of now, I'm on the fence between these two tires.
1. MT ET Street Radial 255/60/15 on factory T wheels, should be 27" x 8.8 wide.
2. MT ET Street bias ply 27x10.5 on factory T wheels, which should also be 27" tall and 9" wide.
I know the bias ply ET Streets will hook a 15psi launch, but I seriously doubt the radials will hold that violence with no suspension mods other than air bags and removed front sway bar. With the little bit of power mods that I've got too work with, and I don't plan on going with heads or intake, I know I've got to launch very hard to get the short times down and get the ET where I want it. Especially with the limited power that I have to work with from the TE-60R turbo. I also know the ET bias plys will hook slightly better on the street if I run them down to 15-18psi. I guess I'm just old school and like bias ply tires for their hooking characteristics at the track under high boost launches.
Couple of questions for two of you guys.
UNDER-PRESSURE
What's your best 60ft with the 255s? What tire pressure do you run? And what boost do you launch with? Got any pictures of those 255s mounted up?
PaCemkr86
What's the specs? Tire pressure you've run, boost level you launch with and best 60ft time?
Do tell and thanks to all.
Patrick