Message ----- Original Message ----- From: Bob Bundy To: Skip Cannon Sent: Saturday, February 14, 2009 2:41 PM Subject: Re: Elvis and his big wheels!!
I run ~11.5 -11.75" front ride height ~12.25-12.5" rear ride height. 225/50/15 V710's on 8" wheels are the ones that rub the most. I also have 225/45/15's on both 8 and 9" wheels. my comparisons have shown the 9" wheels produce consistently lower lap times than 8" My daily driver wheels and tires are 225/45/15 RA-1's on 15X8. I think they still rub in the front over extreme hits but I don't think any of my rubbing is enough to hurt anything. It just shows that I have found the maximum diameter that will work with my suspension setup. I have a set of 275/45/15 that I'm working out the clearances on now. looks like they will need about a 20 to 25 offset and fender surgery with flares to work right. Bob ----- Original Message ----- From: Skip Cannon To: 'Bob Bundy' ; [email protected] ; [email protected] ; 'Bill Cardell' ; 'Keith Tanner' Sent: Saturday, February 14, 2009 2:05 PM Subject: RE: Elvis and his big wheels!! I run my car lower than most lowered Miatas. I have the GC adjustable perches on KYB AGX 8 way adjustable shocks with FM top hats in the rear. I have felt it bottom out on the (cut) bump rear stops a couple of times with a loaded trunk, 2 aboard and towing the trailer but have never seen any indication of tire rub in either rear wheelwell. The front has never bottomed out and I do have one shiny spot on the one of the raised bumps in the LF wheel well but I have never heard or felt it hit. My fenders have not been rolled or modified in any way. It must be that extra .7" in diameter that is causing your problems. BTW, The tire calculator is the ideal, in the real world tires are often not to the measurements predicted by the calculator regardless of what they say on the sidewall. For instance, the 205/50-15 Kumho V700s on my race wheels are significantly wider than the 225/40-16 Toyo T1S street tires. Both wheels are 7" wide. Skip -----Original Message----- From: Bob Bundy [mailto:[email protected]] Sent: Saturday, February 14, 2009 2:20 PM To: Skip Cannon; [email protected]; [email protected]; Bill Cardell; Keith Tanner Subject: Re: Elvis and his big wheels!! You guys must not be using as much bump travel as I am. Pictures of my inner fender rub marks with 225/50/15 mounted with 30 offset. no fender lip rub with rolled fenders but the top of the fender well rubs enough I wouldnt want to go any bigger diameter both front and rear. These tires ar 23.8" in diameter, 225/40/16 are smaller at 23.1" stock diameter is more like 22.7. Elvis will have 25" diameter tires. My suspension has 550# front 350# rear revalved Koni Yellow and custom made shock tops that are made from NB mounts but have more bump travel than other NB shock top conversions because they utilize sherical ball setup rather than rubber bumpers and washers to secure the the top of the shock rod. Bob ----- Original Message ----- From: Skip Cannon To: [email protected] Sent: Friday, February 13, 2009 11:11 PM Subject: RE: Elvis and his big wheels!! I've been running 225/40-16 tires on my lowered '92 for years with no rubbing or other problems. The wheel offset is either 43 or 45, I can't recall which at the moment. Skip -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bill Cardell Sent: Friday, February 13, 2009 8:13 PM To: Bob Bundy; [email protected]; Keith Tanner Subject: RE: Elvis and his big wheels!! What offset did you use, Bob? TurboDog's Dad Bill Cardell www.flyinmiata.com 1-800-FLY-MX5S 970-464-5600 tech support Don't miss our Open House! August 14-17 ------------------------------------------------------------------------ From: [email protected] [mailto:[email protected]] On Behalf Of Bob Bundy Sent: Friday, February 13, 2009 7:46 PM To: [email protected]; Keith Tanner Subject: Re: Elvis and his big wheels!! Wow when I put the 225/50/15 tires on I have rub marks on the top of the inner fender both front and rear rubber to metal at full bump. Id have to loose bump travel or tub the fenders front and rear to go any bigger diameter tires rolling the lips doesn't help that. Maybe my custom shock tops give more bump travel than anybody else or something. Its a 90 with Koni sports and custom spherical ball shock tops made from NB tops it has more bump travel than Fat Cat. Bob ----- Original Message ----- From: Keith Tanner To: Kandasamy, Thuwaragan ; Miata Power List Sent: Friday, February 13, 2009 2:19 PM Subject: RE: Elvis and his big wheels!! The car hasn't been back on the suspension with this setup yet, I'm still in the middle of completing the work. Tire sizes are 235/45-17 front, 255/40-17 rear, on +45mm wheels. I've got the springs off so we can run the suspension through the full range of travel. All four fenders have been rolled but not pulled out much. On the right rear, I had to cut out part of the battery box and move it back to clear the tire. Left rear was almost perfect out of the box. We still have some interference between the sway bar and tire in the front when we try to wind on some steering lock. In the other direction, the tire goes into the control arm just barely at maximum lock. I suspect that with an MSM steering rack the latter problem would be solved. I'm going to see how it drives right now, then probably do some work to increase the sway bar clearance. Thanks to the V8 conversion, Elvis' front sway is further forward and this is not ideal for tire clearance. Keith -----Original Message----- From: [email protected] on behalf of Kandasamy, Thuwaragan Sent: Fri 2/13/2009 9:43 AM To: Miata Power List Subject: Elvis and his big wheels!! Bill and Keith, What all did you guys do to fit those massive meats under the fenders? I know when I threw the 245\40\17 on 17x8 with +36mm offset, I had to pull the fenders out ... but I still have rubbing issues with the Aero kit's side skirts ... and the setup that Elvis has is almost 8mm bigger in diameter. Just wondering if your setup rubs against body while taking corners or driving through lil potholes? 245\35\17 tires are kinda rare to come by cause Goodyear stopped making em. :-( The fronts on mine are 215\45\17 on 17x7 with +40mm offset and I don't really have any rubbing issues, just the rears are being a PITA. -Thuwa ---------------------------------------------------------------------- _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower -------------------------------------------------------------------------- _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
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