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T-400 9" what gears do you think

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Old 12-22-2008, 03:44 PM
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Default T-400 9" what gears do you think

I have a 99 Z with heads and cam put down 410 on a mustang dyno and I have nitrous on top probably wont go anymore than a 150 shot what gears should I go with T-400 and a 9"? also I will be street driving the car ocassionally no real long road trips but take it out and tear it up. what do you guys think? thanks jon
Old 12-22-2008, 03:47 PM
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if your spraying i say 4.10's with a 28in tire
Old 12-22-2008, 04:57 PM
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28" on a 15" wheel will that fit in stock wheel well?
Old 12-22-2008, 06:07 PM
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Originally Posted by yellabella
28" on a 15" wheel will that fit in stock wheel well?
All depending on what 28" tall tire you go with you might have to get the BFH out and do some pounding here and there, not much though....one thing is for sure, you will have to cut your bump stops out.
Old 12-22-2008, 08:04 PM
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does any one have a similar set up and if so what gears are you running and what rpm @ say 60mph on street
Old 12-23-2008, 12:16 PM
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bump still looking for advice
Old 12-23-2008, 03:59 PM
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How much stall? I would say anything above 3200-3400 stay around a 3.89 with a 28" tall tire. Also, you didn't say what rev limiter was set to as well.
Old 12-23-2008, 05:29 PM
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I have change the rev limiter yet I am thinking like 6600 and I will be going with a 3200 stall most likely do you guys think that a 28" tire will fit
Old 12-23-2008, 05:31 PM
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3.89
3.73
4.10 in that order.
Old 12-23-2008, 06:46 PM
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I have a 30" tire. Running a 3200 vig. Gears in the back are 3.5's... But I plan on spraying 2 stage=300+.
Old 12-23-2008, 07:29 PM
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and the 30" tire fits ok?
Old 12-23-2008, 07:55 PM
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Yup, fits great. My rear was shortened a half inch on each side though. I didn't have to roll the finders, or grind the bump stops. I took the bump stops off though, just for insurance.

My suspension:
Lowered 1 inch in the back. 1.5 up front. Eibechs I beleive thats how you spell it.
UMI Poly/rod adjustable LCA'S
BMR Relocated PHB, With a double adjustable BMR PHB.

This is with the ADR's on it<<< 275 60r 17's I beleive. I don't have any pics at the moment with the 30" tire. And it is currently under 1 foot of snow..


Old 12-24-2008, 04:57 AM
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yeah mine is too sweet car I just want to be sure that a 28" slick will work without have to do to much the lower gear I can go with the better. i checked it on that jaws of gear site and it said T-400,28", 4.11, @125 witch is probably around what I should be is at like 6200 should be good
Old 12-24-2008, 05:22 AM
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Mickey Thompson ET Street tire is a 28 x 13.50 x 15!
It has a true 11.0 tread width on the ground, and has a 28.0 tire diameter.




P225/50/R15 M/T drag radial on 10" wide wheels. No fenderwell mods required, inner wheelwell rubbed in several places that was clearanced with a bfh.



This pictures gives you a good view of the 28" tall tires from the front. Bob
Old 12-26-2008, 03:38 PM
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yes it does and that is some great photography so it can be done without much work




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