Koisei K1s at 13 lbs or the Enkei RS5s they come in 15-18 and weigh only about 16lbs



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

jbodyho wrote:They are 24 X 8 X 13 Hoosiers, but if I had to do it again, I'd buy 24 x 9 x 13 Hoosiers.

A 9" tire will peek out from the fenders a bit, but the weld race lites have the correct back spacing so the tire won't come too close to the struts.

On N/A runs I hit the trap in the top of 3rd, say 7,000 RPM with the 24" Hooisers, but that's with a regular HO trans 3.6 ring and pinion.

If you have a W-41 3.94 ring and pinion, a 24.5 - 25" might be better suited, especially for launch to get the car out to the 60' clocks before the 1-2 gear change, and also not having to shift into 4th right before the stripe when running N/A.

On nitrous I'm into 4th easily by 1000'. That's shifting @ 7,100 with stock HO cams.

IMHO...Go with a 9" tire for sure, and pick the diameter based on you final drive ratio.

I'd say no more than 24" for a stock HO trans and at least 24.5" - 25" tire for a W-41 trans.


Karo, any opinions on my input to KQ4? I think you run a W-41 trans...

sorry to bring this one back from the dead, but i was using the search button.
im about to have a killer deal on a set of 26x8.5x14s, and i want to get them, but im worried about how they will fit, depending on the wheel i use. do you think i could fit this on a stock pontiac aluminum 14" wheel, with its normal backspacing, or would i have to spring for the weld wheel you have (or steel circle track equivilant)?

also, my car 87 sunbird is on stock suspension. do you think the 26" height would be too great to fit? i have nitrous and the 3.61 final drive, so im not too worried about my trap speed, but i dont want to buy the tires and wheels only to find they wont work together.


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"What are we going to do tonight?"
"The same thing we do every night, try to make the SVC go faster!"

They'd fit fine at stock ride height with my Weld wheels, but with other wheels and/or offsets I can't say.




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Project S-Bird

hmm. good info. i think im going to pass on it, cause on the 225/50/16s i have ot he sunbird now, i barely have room for my fingers over the top of the tire and the spring perch of the strut. i think i should go with a shorter tire, like a 24" and perhaps an 8" wide patch.


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"What are we going to do tonight?"
"The same thing we do every night, try to make the SVC go faster!"

Hit Jake up on the size BFG DR's he's using.

They are close ot the same aspect ratio of your tires, but on 14" wheels, thus two inches smaller in diameter just by the smaller rim.

I think you'd be happy with the tire he's using on stock 14" J- body aluminum wheel.




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Project S-Bird

kro what 1/4's are you running now ??

(12.332@112.22) last time posted... but that was a year ago...

how much do drag radials run guys?




"There is no point in looking fast if your not."