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Old 01-15-2004, 03:34 AM   #1
schlong8
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Default 225s on a GC8, will they fit?

Hey guys,
Don't know if people can answer this or not, but if i run 225 R-rubber on my car will it rub? I'm pretty sure it will and would like it confirmed.

I have AGX struts and Tein springs installed, and the drop was alot greater then i thought it would be when i got them. About 2" lower then stock, but it does look mean in the summer.

thanx
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Old 01-15-2004, 08:09 AM   #2
mav1c
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It might depend on the offset, but I would almost gaurantee you will rub. Get the fenders rolled if you really want to run them.
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Old 01-15-2004, 10:24 AM   #3
GQ
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I asked about this issue in the past. I believe that they will rub, even with rolled fenders and with any suspension, or wheel offset.

Here is the response that I got from Brett at SoloRacer.com:

"With my 225/50-16 V700's I get some rubbing in the
rear on the fender lip. It seems to be worse on sharp
turns, and at our last event, it rubbed more than
usual. It's something I'm worried about for next year
since I don't know what sizes the new Kumhos and
Hoosiers will be coming in.

Its hard to say whether you will have rubbing with
your setup, but I think it'd be less of an issue than
on my car which has a lot of body roll. Are you just
doing autocross, or also track events? Rubbing on the
track might actually be less of a problem because the
corners aren't as sharp as on some autocross courses.
I do know that one of our local DSP guys ran 225
Hoosiers (which are actually wider than the Kumhos) on
his car and he never mentioned rubbing problems. I
think his stiffer suspension prevented any rubbing, so
that may help you. I get a lot of body roll on my GS
car, and thats why I think I have problems with it. "

http://www.soloracer.com/
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Old 01-15-2004, 10:55 AM   #4
Jon Bogert
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Posted some pics of test fitting 225/50-16 and 225/45-17 here:
http://forums.nasioc.com/forums/show...hreadid=480859
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Old 01-15-2004, 02:47 PM   #5
schlong8
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Default

Thanx for the replies guys.

This is for primarily AutoX and the occasional trackdays.

When i first lowered the car there were some very minor rubbing issues with RE92's on extreme turn ins. But i've added some more suspension parts, mainly an ALK and finally a 24mm rear sway bar so that has "flattened" the car a bit but i'm still not sure.

I'm running in D/SP up here in Canada according to the Canadian AutoX guidelines. Not too sure how closely they are matched w/ u Yanks, but i think they are pretty close.

What alignments are people running? Do you think a sig amount of neg camber will help alleviate some of the rubbing.

chris
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Old 01-15-2004, 03:32 PM   #6
Jon Bogert
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You get a little more than 5mm change in fender clearance for each degree of camber change.

If you change camber using camber plates, there's no impact on strut clearance. If you use eccentric bolts, you lose on the strut side whatever you gain on the fender side.

Edit: did my arctangents wrong...

Last edited by Jon Bogert; 01-15-2004 at 04:14 PM.
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Old 01-15-2004, 04:41 PM   #7
schlong8
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Quote:
Originally posted by Jon Bogert
Edit: did my arctangents wrong...
hehe, lemme guess. Ur an engineer?
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Old 01-15-2004, 04:55 PM   #8
Jon Bogert
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No, but I passed 9th grade geometry.
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Old 01-16-2004, 09:20 AM   #9
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From experience, if your talking 17s, there is no way a 225 will fit, no matter what you do.
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Old 01-16-2004, 09:57 AM   #10
bbimpreza
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I am not trying to argue with anyone, but 225s will fit on a GC chassis car. I have a 2000 Subaru Impreza 2.5 RS that I have been racing for 3 years now. For daily driving, autocrossing, and some track events, I run a 225/45/17 Falken Azenis on OZ Superleggeras 17x7 with a 48mm offset, purchased from Tire Rack. They were originally run when I had KYB AGXs with Eibach ProKits. Although there was some initial rubbing, as soon as the fenders were rolled, there were no more rubbing problems. This size tire and wheel have been run with three different suspension setups with no problems. Eibach ProKit springs & KYB AGXs, Ground Control Coilovers with custom spring rates & KYB AGXs, and finally the stock struts custom built into coilovers by Koni. So to answer your question, they will fit, without rubbing, when the fenders are rolled.
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Old 01-16-2004, 10:45 AM   #11
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Kewl, thanks for that info. I will now look into 225's on a 48 offset for my car. I have been frustrated by the lack of R coumpounds that will fit my RS.
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Old 01-16-2004, 01:39 PM   #12
Jon Bogert
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bbimpreza, did you modify the fender liner, or just remove the plastic fender trim and fold under the metal lip? Also, did you "pull" the front fenders a bit while doing it?

Love to see an up close photo...
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Old 01-16-2004, 03:20 PM   #13
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I've been running 225/50-16 on '98 Golds on my '99 RS. Been sitting on a KYB/GC setup for about 6 months, lowered about 1" F and 1.5" R. No rubbing.

I ran 245/45-16 front and 225/50-16 Kumho R compounds on my car when in G-stock. Victoracers rubbed in the back, Ecstas did not. However, friends RSs have seen rubbing in the back with Ecstas. On the shock body, lower spring perch, and fender lip molding.

Hiroo Sumida is running 225/45-17 Azenis on his STS 2001 RS, but needed rear camber plates to give clearance. He is running a Tein setup, so issues with rubbing the perch.

Chris H.
www.subrew.com
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Old 01-16-2004, 07:06 PM   #14
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ooooh.....I'm telling the internet police you're running mismatched tire sizes!!!! Your car's gonna blow up now!

We ran the same setup on our DSP machine and had no problems with rear rolled fenders. On OEM 98 wheels, we had to add spacers to the rears to get strut clearance because we run crashbolts.

245's fit up front like they belong there. Actually, on RH CP035s they fit in back too (without spacers).

Jay Storm
www.sourcemotorsports.com
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