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