different tires or new rear gear.. - Ford Mustang Forum
 
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post #1 of 8 (permalink) Old 03-18-2011 Thread Starter
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different tires or new rear gear..

Hey guys, not trying to open ANOTHER "which gear is best thread", just looking for some opinions on my situation...I run a KB 2.1 and the car's suspension is FULLY done..uppers/lowers/koni adjustables/k member etc etc...I'm only running 6lbs of boost and dyno out right at 370rwhp...I currently have shitey sumi's on the rear (315's) and run a 4.10 gear, which was the set up when I bought it...I have absolutely no traction in first , second and usually third...I am considering dropping a gear or even two to possibly a 3.55.. OR would 555r's drag radials actually almost solve my problem??? would it make that much of a difference?? I like the gear, but not the traction issues, and I assure you the driver mod isn't whats required...if you havn't run these tires you probly don't realize just how bad they are, and they are about 80% tread!!


2003 GT - KB 2.1 - 90mm LMAF-focus pump, Kooks L/T's, 360hp/375tq, koni's all around, k-frame, upper/lower CA's, full Steeda susp.. 17x9" and 10.5's black bullits with 315's out back. nothin but chrome under the hood.. Goes, turns and stops!!

Last edited by blak05; 03-18-2011 at 12:25 PM. Reason: boo boo
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post #2 of 8 (permalink) Old 03-18-2011
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Drop in gears and tires. 3.55's are good round about gear for TS or Root style SC's. Some like 3.73's too. The Nitto's won't do squat for you unless you ease in first, second, the get on it in second after going in it alittle. At one point, on my Cobra, I had 3.55's and Nitto 315 drag radials and if your hard in first or second, they would light up like nothing. Good for the street, sucks for the track. But I have 463rwhp but still...drop in the gear numerically and get a stickier tire like the NT555r's.

Note..I have 3.08 gears and NT05's and can still light them up like a Christmas tree in first or second.


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post #3 of 8 (permalink) Old 03-18-2011
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I don't know much about the Nitto's themselves, but given the choice between gears and tires. I would pick tires. The gears are a nice mod, but frankly I'd save the Sumit's for when you plan on burning up a fair amount of tread but replace the tires. Look up tires that they are running on the new GT500's. They are Goodyear Eagle F1 SuperCar G: 2. I would imagine if they can't plant the GT500's power, they should take care of you. Though your looking at probably 250 a tire with those.

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post #4 of 8 (permalink) Old 03-18-2011
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I'd start with tires only because the Sumi's suck notoriously even with stock gearing and power, the MT dr's are supposed to hook better than the 555r's but you'll get less mileage out of them. Ultimately though I think going with 3.73's or .55's is going to be the real solution.


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post #5 of 8 (permalink) Old 03-18-2011
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Easy fix and take care of both at once:

Run a 28" tall drag radial. It'll put your gear equivalent to around 3.70:1 and give you more traction.

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post #6 of 8 (permalink) Old 03-18-2011
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Quote:
Originally Posted by Nagakilo View Post
I don't know much about the Nitto's themselves, but given the choice between gears and tires. I would pick tires. The gears are a nice mod, but frankly I'd save the Sumit's for when you plan on burning up a fair amount of tread but replace the tires. Look up tires that they are running on the new GT500's. They are Goodyear Eagle F1 SuperCar G: 2. I would imagine if they can't plant the GT500's power, they should take care of you. Though your looking at probably 250 a tire with those.
Have you driven a new GT500 yet? They don't have what I would call good traction. In fact, that's been the major complaint with them by most owners.

2001 Dark Highland Green Bullitt
[email protected] naturally aspirated on a bone stock 2V longblock

Under Reconstruction for RS275 Drag Radial Class
Pushrods and Powerglide Coming Soon

If it weren't for physics and law enforcement, I'd be unstoppable.
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post #7 of 8 (permalink) Old 03-18-2011 Thread Starter
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Quote:
Originally Posted by Bullitt5339 View Post
Easy fix and take care of both at once:

Run a 28" tall drag radial. It'll put your gear equivalent to around 3.70:1 and give you more traction.
thx for the reply, i should have clarified that although my car has only 30K miles on it it will be primarily my daily driver in a couple weeks...thats why i was considering the 555's as they seem to have decent milage.. think i may just go with the gears....bye bye thousand bucks....

2003 GT - KB 2.1 - 90mm LMAF-focus pump, Kooks L/T's, 360hp/375tq, koni's all around, k-frame, upper/lower CA's, full Steeda susp.. 17x9" and 10.5's black bullits with 315's out back. nothin but chrome under the hood.. Goes, turns and stops!!
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post #8 of 8 (permalink) Old 03-18-2011
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Then you could always run just a 28" tall 555. Just another option for you. A 275/50 will get you close to 28".

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[email protected] naturally aspirated on a bone stock 2V longblock

Under Reconstruction for RS275 Drag Radial Class
Pushrods and Powerglide Coming Soon

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