Guest V8Z Posted January 17, 2005 Share Posted January 17, 2005 That's what I need to know, If the test fitted rims are 5.75 backspace and are hitting the coilover, would 5.5 backspace be what I need to order and then not have use the 1/4" spacer? Quote Link to comment Share on other sites More sharing options...
Guest iskone Posted January 17, 2005 Share Posted January 17, 2005 That's what I need to know, If the test fitted rims are 5.75 backspace and are hitting the coilover, would 5.5 backspace be what I need to order and then not have use the 1/4" spacer? Yes. But you might want to check the full travel of the wheel before you buy your wheels. If I was you I'd go with a rolled lip and a 1/2 spacer combo to try and squeeze in a 275/40. Isk Quote Link to comment Share on other sites More sharing options...
Bartman Posted January 17, 2005 Share Posted January 17, 2005 In your original post you mentioned that it "fits great in the fenders" and you were worried about making the tire stick out past the fender. A couple of people have mentioned getting 8" springs instead of 10" ones. It seems like a better solution than spacers and it would keep the current fit in the fenders. Quote Link to comment Share on other sites More sharing options...
2126 Posted January 18, 2005 Share Posted January 18, 2005 I have to agree with Bartman! I encountered this situation when I installed my Ground Control coilovers. I went from 10" to 8" rear springs on the recommendation of GC. They told me this situation happens quite often when using wheels wider than 7" on early Z cars. I'm running 235-40 x 17" tires on 17"x 9" wheels in the rear and I have approximately 1/8" clearance between the wheel and the strut assy. The clearance at the outside is at its limit, meaning, if I went to a wider tire it would rub the inner fender under compression. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted January 18, 2005 Share Posted January 18, 2005 I tried fitting 275-40s on my Z (In the link above) and although the wheel cleared the strut assembly with the right spacer, it simply would NOT clear the fender under comression... I tested it by removing the spring with the car on jack stands, replacing the wheel/ tire with the proper backspacing (Used spacer) and then jacked up the control arm to simulate the stroke... With 3inches of strut travel, the fenderlip to top of tire clearance set at 1.5 inches, the tire had a total of TWO inches of travel before making contact with the body of the car... Under heavy acceleration, you will get a 275# coil spring to compress that much. Bottom line is even with the fender lip rolled (Mine are) it rubbed the fender inner well. Mike Quote Link to comment Share on other sites More sharing options...
Dan Juday Posted January 18, 2005 Share Posted January 18, 2005 Camber plates wont help with that. They will just tilt the tire in with the strut. You don't need much clearance between the tire and the strut. 1/4" is enough. I'd just order the wheels with a little less back spacing or use slip on wheel spacers. This is all dependant on whether you have enough room on the outside to move the tire out anymore. Quote Link to comment Share on other sites More sharing options...
Mikelly Posted January 18, 2005 Share Posted January 18, 2005 I just saw your pics and those are the wheels I'm rolling my car around on right now. Mike Quote Link to comment Share on other sites More sharing options...
Guest V8Z Posted January 18, 2005 Share Posted January 18, 2005 Alright, I think I have my plan in order. I'm going to order 17x8 rims, 5 on 4.5 lug pattern, 5.75 backspace on all four rims, and put a 5/16" spacer on the rear. This should give me a 1/4" of space between the perch and the tire. I did what MIKELLY said about removing the spring and compressing the travel out of the strut.With a mocked up 5/16" spacer It will miss the unrolled fender in the rear by 3/16", close but liveable. And like I said earlier, 5.75 backspace on the front works out great with no spacers or modifying. It will be 4 to 6 weeks to have the rims made and shipped out to me. I'm going to run Boyd Coddington Smoothie II rims, when I get them on I'll put up some pics. http://album.hybridz.org/showphoto.php?photo=1155&sort=1&cat=500&page=1 Quote Link to comment Share on other sites More sharing options...
Guest 240zJake Posted January 19, 2005 Share Posted January 19, 2005 When the tire heats up, how much would it expand? 3/16ths? Would that be an issue? Quote Link to comment Share on other sites More sharing options...
HB280ZT Posted January 19, 2005 Share Posted January 19, 2005 Also something else to think about is how the tire will change when you are really getting on it in a corner!! Tires do flex side to side some in heavy cornering! Good luck! HB280ZT Quote Link to comment Share on other sites More sharing options...
buZy Posted January 22, 2005 Share Posted January 22, 2005 Would not camber plates give more tire clearance to the outside fender lip? Maybe allow room for that slightly wider tire/rim set up? Quote Link to comment Share on other sites More sharing options...
JMortensen Posted January 23, 2005 Share Posted January 23, 2005 The original problem was the tire hitting the strut. Camber plates won't help that situation because when you adjust for more negative camber the axle and the strut housing move together. The plates will lean the tire in giving greater clearance IF you dial in more negative camber, and then you have to deal with the tire wear issues and all that if it's a street car. Quote Link to comment Share on other sites More sharing options...
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