Wheel offsets/axle lengths - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 9 Old 08-23-2011, 04:09 PM Thread Starter
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Wheel offsets/axle lengths

Hey all,

What's everyone running for wheels and axles on their Fox cars with larger tires?

I've got the standard Cobra brake conversion kit with the SN95 rear axles, '95 Cobra R R58 wheels on front and the '95 R Fox conversion wheels (M178, I think) wheels in back. I've got 275/45/17 Toyo RA1s on all 4 corners.

I'm getting some rubbing noise in the back (fronts are fine) but haven't figured out exactly where it's coming from. It may be the tailpipe on the tire. I thought about trying the R58s on the back and seeing how they clear the fenders but thought I'd check in to see if anyone else is using the SN95 axles, somewhat larger tires, and same offset wheels on all 4 corners and not running into clearance problems inside or out.

Thanks

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post #2 of 9 Old 08-23-2011, 06:08 PM
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Ranger axles, 03 Cobras with 275/40/17s all around. 1/4" spacer in the rear. I could probably ditch the spacer since the rollbar has been removed. It had a bracket in the rear wheel-well and the tire would rub the bracket upon angled driveway entry. This is on 93GT


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post #3 of 9 Old 08-23-2011, 09:27 PM
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'92 Fox, SN95 axles, SN95 FCAs, 94-95 spindles, rolled fender lips, PHB, no quad shocks. I run 17*9/36mm wheels at all four corners with 275s when auto-x'ing, no problems. I've got a pair of 17*10.5s that fit on the rear as well, 40mm offset? (I always forget and the wheels aren't here for me to check). I tried 315s on those wheels but that didn't work too well (and looked pretty silly sticking past the fenders). A 275 on the 10.5 works just fine though and a 295 would probably fit just fine.

On the street, I just use 17*8 '99 GT wheels.
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post #4 of 9 Old 08-24-2011, 01:21 AM Thread Starter
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Originally Posted by aurdraco View Post
'92 Fox, SN95 axles, SN95 FCAs, 94-95 spindles, rolled fender lips, PHB, no quad shocks. I run 17*9/36mm wheels at all four corners with 275s when auto-x'ing, no problems. I've got a pair of 17*10.5s that fit on the rear as well, 40mm offset? (I always forget and the wheels aren't here for me to check). I tried 315s on those wheels but that didn't work too well (and looked pretty silly sticking past the fenders). A 275 on the 10.5 works just fine though and a 295 would probably fit just fine.

On the street, I just use 17*8 '99 GT wheels.
This is all I've read (that there's plenty of rear tire room). I may try to find a couple more R58s for the rear and see if they work, they fit ok statically but not sure how they'll work til I get them on the track. I was trying to avoid sticking the tires further out but I may have little choice now. I guess I can try to run some type of side exit exhaust but I hear these don't work well with full length SFCs and I hate dump pipes. I really wish the tailpipes fit better with the PHB, that has been one of the problems that keeps rising back up as I get the car dialed in now that the suspension and engine have been changed out. I can get the pipes to keep from rubbing the PHB, fit in the cutouts in the rear Cobra bumper or keep off the tire but I can't seem to get them to do all three things at the same time.
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post #5 of 9 Old 08-24-2011, 03:38 PM
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86 GT, Ranger axles with .5" spacers; MM PHB and PM3L (rod-ends - no rubber); fender lips and wheel wells are stock (no clearancing at all); still running the quads; rear ride height is 26" ground to lip. Wheels are 96 Cobra 17x8s with 245/45s. The tires clear the lips and exhaust by no more than two fingers at static ride height and rub both pipes on tight and fast A/X courses (the suspension articulates with no bind and is very compliant with H&R Super Race conventionals). There is no other apparent rubbing. If I added 1" to the wheel, that inch would have to be equally divided on the current offset to run say a 275, but I'd lose probably a finger width of clearance on both sides. I'd end up hitting the pipe more and probably the outer wheel well/lip. A 10" wheel would fit, but I couldn't turn at anything like I do now and not have major rubbing issues. On the front, I have sn95 length a-arms on a stock (narrow pickup) k- member with 300# C/Os with -1.8* camber. Again, no mods to the fenders. At the current ride height (25-5/8") I have little to no rubbing on those same tight, fast courses. If I went to a 9" wheel and 275s up front there would be some issues; I might have to run a lot more negative camber and probably do some fender mods.

Forgot to mention the tires used in this discussion are Hankook Ventus v12s. These things roll-over pretty good even with a lot of air in them. Thus, an R-comp might not present the same rubbing issues.

Last edited by qtrracer; 08-24-2011 at 03:53 PM. Reason: added stuff
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post #6 of 9 Old 08-24-2011, 11:07 PM
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I must have the oddest 92 in the world. I'm running 17x8 Cobra wheels on fox axles and 255/40-17's rub on the tailpipes as it is. I can't move the pipes any closer to the gas tank, and if I ran wider tires, they'd rub the fender too despite them being rolled.
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post #7 of 9 Old 08-25-2011, 01:21 AM
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'89 Notch...

Ranger axles, 255/40-17 Dunloop Direzza Z1's, Enkei RPF1 17x9 22mm offset. No spacers. Quad shocks removed. MM coilovers and MM PHB. There's plenty of room there for 275's when these wear out.




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post #8 of 9 Old 08-25-2011, 10:31 AM
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What kind of tailpipes are those?
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post #9 of 9 Old 08-26-2011, 01:18 AM
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Quote:
Originally Posted by MFE View Post
What kind of tailpipes are those?
I believe they are Magnaflows (like the mufflers) but not 100% sure. They were on the car when I got it.

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