Hey all,

Hopefully going tomorrow to get my wheels and tires put on as well as an alignment and hopefully going to go with the lance settings.

I have done some digging on here however most of the posts reference 1 link which is now no longer active. Attqched below is the most promising info I found for the lance alignment specs but I guess without the Supra rear subframe they will not be the exact settings I have read?

The main question I have is about halfway down in bold it talks about the tire size and how it affects toe and how to figure out what you need. I'll be running 18x9.5 +23 on 245/40zr18. Is anyone able to help or explain how I can figure out exactly what toe settings I'll need?

Thanks in advance!

 

You'll find that in the rear you will not be able to replicate the MKIV Lance alignment settings on an SC/Soarer. You can get them close but not the same in the rear because the rear subframe and geometry is slightly different.

But it's still a good base of settings to start from.

I am not well versed enough with alignment theory to answer your question but I think I can find the printout from one of my last alignment sessions during which the technician and I figured out a good compromise between what the SC's suspension can do and what the Lance Alignment specs call for.

A good alignment specialist who understands how each of these settings affect any vehicle's handling and tire wear should be able to do the same however.

The main reason I went with a the Lance settings as a starting guide was that with staggered Supra TT rims and the wide rear tires, an LSD, Supra TT rear sway bar and an aftermarket suspension I felt my SC was a little more tail happy than it should be with the stock SC alignment specs. The MKIV Turbo Lance settings are not all that different from an SC's normal alignment settings but there is something about them that I feel settled my car's handling and dialed it closer to where it should be.

If I can find my last modified Lance alignment setting printout I'll post it for you to compare.

 

Thanks for the reply man!

Yeah if you wouldnt mind posting yours I'd appreciate it, what size tires do you have? I linked another 2 I was able to find as well just for any one else looking.





Cheers!

 

On my car I am running OEM Supra TT rims in 17x8 front and 17x9.5 rear with 245/45-17 tires up front and 275/40-17 tires in the rear. I have MKIV Supra rear subframe mounts with an OEM 93-96 22mm MKIV TT rear sway bar and an OEM MKIV NA/TT front swaybar. My ride height with my Gixxer coil overs is close to stock... maybe 1.5" or just below 2" lower (the car does not look lowered) than stock so my SC's suspension geometry should still be pretty close to "normal".

 

Wait, did my ranting on people running mismatched tire diameters by following Supra specs convert someone?? I'm loving my 245/45-275/40 TT combo. Makes me sad it'll be time to put the winter wheels on soon.

 

Hey, the more converts to a staggered wheel and tire setup with an SC the better!

I was running a similar combination shortly after I bought my SC and this same set of Supra TT rims in 2010. Back then when I had the stock NA engine I started with 235/45-17 in front and 275/40-17 in the rear... but once I changed the rear end from 4.083:1 to 4.272:1 I switched to 235/45-17 front and 255/40-17 rear. This actually made the rear overall diameter slightly smaller than the front but it was the MKIV TT's stock tire size combination. It also helped to maximize acceleration with the NA 2JZ engine and W58. Eventually once I knew I was going to swap in a boosted engine I switched to the 245/45-17 front and 275/40-17 rear combination I'm still on today. I feel it's a good overall balance between handling, grip, control and affordability. The car can take much more tire width in the rear but it's not needed unless you're pushing a lot of horsepower. I think 285's will also usually fit without much trouble but wider rear tires than that often require some creative fitment and modification depending on the offset of the wheels and tire width.

I think a square setup suits many other cars very well however. This one and its Supra sibling just respond well to a staggered wheel and tire combination IMO.

 

Is NA acceleration the reason for the Supra's weird specs?? That wouldn't really explain it being like that on the TT's, though.

Beyond performance reasons, it just looks right on the SC to have a wider and/or lower offset wheel in back, otherwise it gets more of the sunken look than the front.

 

I'm only familiar with the Supra MKIV TT's stock 17" wheel and tire size diameters. Supra NA's got 16" wheels but I am not sure if the stock NA rear diameter was very slightly smaller in the rear than in the front like the TT's. Anyway, most MKIV Supra TT owners go from the stock 255's up to 265's or 275's in the rear. Even on NA I have to admit after trying 255's that I ultimately prefer a 265 or 275 width tire in the rear even if I might sacrifice a little acceleration potential with an NA setup.

If you're referring to alignment specs between the SC, Supra MKIV NA and Supra MKIV Turbo I'm not as educated on the theory of it to have an informed opinion in that area.

 

Ah, good point, the 17" wheels (and corresponding tire sizes) are only applicable to TT's.