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F350Lawman's Avatar
 
Join Date: Jun 2006
Posts: 295
What size wheels and tires

I am looking to do a wheel/tire upgrade for the car in my signature. I am leaning towards Kodiak Racing in 9 and 11.5 inches respectively. Tire wise, I am pretty sure I'm going with 315s in the rear and I am thinking of 255 or 265 up front. I 'd like to be able to brake harder than the little 225s now allow w/o locking up so easily and I'd like not to spin under boost so easily as well. Right now w/ 225 and 245s my rear end often breaks lose under boost and the front tires seem to plow if I get crazy in tight turns. Now mind you it still handles 10x btter than the stock setup but why not get the most out of it. I am comfotable that my mechanic has the suspension set well, I just think that I am a lillte shy in the tire dept.

Anyone have any experience with that setup I am considering on a car w/ the aftermarket Smart Racing adj. sways front and rear? I don't think they offer any addiitonal clearance issue, but figured I'd ask.


Thanks
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1987 930 - K27 7200 / DAS Full Cage / Blownsix Intercooler / BB Headers / Zork Tube / Tial 46mm / Adjustable WUR / RPM Activated Solenoid / Open Element Air Intake / Smart Racing 27mm Sways / 24 and 33mm Torsion Bars / Adj. Spring Plates / Wevo Strut Brace / Monoballs / Tow Hooks / Oil Cooler Scoop / Brey Krauss Harness Truss / Race Seats / XD-16 AFR Guage/ 17" Kodiak Racing Whees and Nitto NT-01 255/315s
Old 04-17-2008, 03:25 PM
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x98boardwell's Avatar
 
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Location: Central Valley, CA
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Here's mine

1994 3.6 RH-Wheels

8/10 x 18.
245/35 ZR 18 on front
285/30 ZR 18 on rear

BF Goodrich G-Force T/A

Bryan



Old 04-17-2008, 03:29 PM
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I know guys run 315s on 930 w/o a problem, the front w/ 265 is my real question. I looked this evening ansdthe Smart Racing bars ssem to be no problem.
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1987 930 - K27 7200 / DAS Full Cage / Blownsix Intercooler / BB Headers / Zork Tube / Tial 46mm / Adjustable WUR / RPM Activated Solenoid / Open Element Air Intake / Smart Racing 27mm Sways / 24 and 33mm Torsion Bars / Adj. Spring Plates / Wevo Strut Brace / Monoballs / Tow Hooks / Oil Cooler Scoop / Brey Krauss Harness Truss / Race Seats / XD-16 AFR Guage/ 17" Kodiak Racing Whees and Nitto NT-01 255/315s
Old 04-17-2008, 07:37 PM
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Doug Siegel
 
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I run Fikse FM10's, 11x17 and 9x17. 315 rear-245 front. goodyear f1. The 11 rear has a couple mm's of clearance to the body. There is about 6mm of clearance to the wheelwell. Because my rear camber is slightly off, there is 6 mm. Once ride height is set to proper Euro spec, I'm expecting barely any room.

The 245's in front are having rubbing issues on turns. No way could I run 265's. The 245's look great.

Perhaps the 70's 930 had more wheel clearance.

I don't know how to get pics onto this post. If you send me a pm with your email, I'll send you pics.
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88' blk/blk 930: Haltech EFI, Twin Plug, Pauter Rods, Nascar Bearings, custom crank work, dowel pinned case, ported manifold and heads, Kokeln I/C, SC Cams, Turbonetics ball bearing 62-1, BB headers, RARLYL8 Zork, additional 993 oil filter, plx/inyourface gage, RS style coilover, Fikse FM10-17 wheels, TIAL 46mm 1 bar. (where the heck did all my money go?)
Old 04-17-2008, 08:40 PM
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wcc wcc is offline
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When I get there, I'm planning on running a 235 on the front.
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Old 04-18-2008, 05:33 AM
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I'm running 245/50/18 in front and 285/30/18 for the rear... my car is lowered to Euro spec's and this is about the best setup... any wider in the rear would probably cause tire rub when the car squats at boost. Just my 2 cents worth. Tires are Pirelli P-Zero Russo... great for the day twisties...


Last edited by martinb930; 04-18-2008 at 11:58 AM..
Old 04-18-2008, 11:02 AM
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Crotchety Old Bastard
 
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I'm running 255/35-18 front and 315/30-18 rear.
Front is about maxed out, could go 335 in the rear easy.
Actual measured tire sizes vary with manufacturers. Pirelli has the smallest tires for the advertised size in my opinion.
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'78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar
Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8
Old 04-18-2008, 11:41 AM
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