jack46 Posted November 8, 2005 Share Posted November 8, 2005 I presently use 26/8.5/14 and want to use 26/10/15, but don't know what offset or what rims to allow them to clear a 260Z. Presently the 14"s hold but when I replace I think it is time to consider a wider setup Thanks Quote Link to comment Share on other sites More sharing options...
drzed Posted November 8, 2005 Share Posted November 8, 2005 I don't think you can fit the 10" wide slicks without either running coil overs or flares. I run the 26/8.5/14's on my 260Z with stock suspension and stock rear fenders with the lips rolled - they just fit. I use the 14x7 Supra wheels as the offset is almost perfect. The slicks I use are old and well worn but they still seem to bite well enough for mid 11's. How fast do you plan to go? Quote Link to comment Share on other sites More sharing options...
jack46 Posted November 8, 2005 Author Share Posted November 8, 2005 I don't think you can fit the 10" wide slicks without either running coil overs or flares. I run the 26/8.5/14's on my 260Z with stock suspension and stock rear fenders with the lips rolled - they just fit. I use the 14x7 Supra wheels as the offset is almost perfect. I plan on rolling the lip, also I have a cable that keeps the car from squatting so I might be ok. The slicks I use are old and well worn but they still seem to bite well enough for mid 11's. How fast do you plan to go? I have an LT1 with 224/232 and expect/hope to run <1.6 sec 60 foots. I SHOULD have ~340 RWHP. I have run it before, but my torque converter was way tight. I have one being built for it now, I live in south so we run 1/8 here so never went 1/4, that's why I gave 60's since that is apples to apples. Thanks for reply. I was hoping they 'fit' but don't want to go through alot of gyrations to make em fit. Quote Link to comment Share on other sites More sharing options...
bjhines Posted November 8, 2005 Share Posted November 8, 2005 I have a variety of wheels from stock Z car wheels, slotted 14x7" mags, to 4 sets of performance wheels in 15x7,15x7.5, 15x8, and 15x10. They have back spacing that are anywhere from 4 1/8" all the way to 5 1/4". The idea is to keep the center of the wheel the same location as stock... Most people running 15x10" wheels are using 5"+ backspacing to keep the bearing loads correct. This backspacing will not only require coilovers...but it will also require very short spring perches in the rear to allow the tire to come as close as possible to the strut housing...within 1/2" to the actual TUBE... Of course...all of this changes if you decide to mount brakes with thicker "hats" than the stock rear drum...as many willwood set ups do. The front disks mount to the rear of the hub so they do not interfere with offset. I can also assure you that you will have to cut away the upper fender lips and bond on some flares to provide clearance to the outside edge of the tires.... Keep in mind that big slicks require extra camber, caster, and toe in rear ,and toe out in the front. These changes can end up moving the wheels forward in the wheel wells...so be sure you have all the parts set up when you cut the wheel well lips away. Quote Link to comment Share on other sites More sharing options...
bjhines Posted November 8, 2005 Share Posted November 8, 2005 A size that I use on one of my 240Zs with stock spring perches is.... 15x7 +4 offset....225/50/15 Victoracers....less than 1/2" clearance to the stock spring perches.....I had to roll the wheel well lips to provide clearance.....fattest tire and wheel combo you can get in there without actually cutting the lips or converting to coilovers. Quote Link to comment Share on other sites More sharing options...
jack46 Posted November 10, 2005 Author Share Posted November 10, 2005 Thanks for info. The plan is presently to go back to track and see how it does in 60's. Then determine if I need a change to larger tire--I suspect I will or hoping anyway Thanks again Quote Link to comment Share on other sites More sharing options...
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