///Mous3

Is NJ running on stock GT3 suspension?

NJ-GT

Actually, I almost made it to the dyno day. I got there at 2:15pm. The guys at AWE Tuning told me you took off to somewhere in New Hope.

The reason to go with the Manthey camber plates was caster. When you flip the stock camber plates, you get more negative camber but less caster. The Manthey camber plates have 1 extra degree of caster, while camber is -3.0 minimum without shims. It's very good for my inside front wheel (combined with front sway bar at full soft). I tried 7mm camber shims, rotating the stock camber plates and now this.

NJ-GT

I'm running the stock suspension, on the stock ride height rear 128mm and 108mm front (-17mm from US stock). It was set when running 235/40R18 and 295/30R18 MPSC last year. I haven't changed my ride height since then. However, once you set the ride height and switch to other tire sizes , the ride height is also altered, but not the rest angles on the control arms. The Manthey camber plates made the car even lower at the front.

The RUF RGT runs 12" rear wheels. The Cup car uses a 11" ET59 wheel with a very tall tire (26.77"), on a totally different front and rear geometry and a lower ride height. I've been told by different sources not to mess the rear geometry on the stock street GT3 suspension. In fact when I ran -10mm rear ride height, I experienced plenty of scary moments at the track.

The 335/30R18 RA-1 is just 0.3 inches wider than the 315/30R18 MPSC. It's also 0.5" taller, and you can feel the difference in gear ratios if you just switched from 295/30R18 MPSC.

Z06

If such a large tire (275) fits on the front would it not also fit a 9.5" or 10" size rim?

with the 1/2" of a larger rim going towards the inside... with more back spacing?

I asked HRE this and they did not think it would work...they also did not think the 265 would fit.

NJ-GT

Yeap. Some people claim that a 315 or anything larger won't fit at rear, or a 265 or anything larger won't fit at front.

Rob and Chris Boynton are driving a GT2 at SCCA Solo2 National level. They're running a 9.5" front CCW wheel. If you call CCW they will give you the offset. It should be something like 9.5" ET50-52.

Z06

R,

Is the front setup on the GT2 the same as the GT3?

How snug is the 275? do you think there is room for a 285?

John at CCW is comming out with a Motorsport 1 piece rim for the GT3 in about 2 weeks....9x18 11x18 ....should be in the $2400 range.

Mikey

I CAN'T BELIEVE IT ... the rears fit perfectly!!! These things are like 335 tires. I'd probably go with 255 MPSCs front next time. The 265's are a bit too wide. Imagine almost the stock rears in the front wells. The best part, NO FENDER ROLLING REQUIRED !! They look stunning on the GT3 .. just the same look as a cup car and same amount of rubber on the ground at this point.

BTW Z06 HRE has every finish option including painting, powdercoating, anodizing, polished aluminum, etc. The centers are forged and the rest of the hardware is Titanium.

Z06

quartermile,

Do you have the rear at the stock ride height?

For the fronts do you have shims or rotated tops?

Can you get by with the 265 as is? or do they rub?

And of course pictures would be nice.
Thanks,

NJ-GT

G:

265 with stock tops will rub. With rotated stock camber plates they won't. With 7mm shims to get -2.5 degrees, even the stock 235 tire will rub.

My 265 don't rub. My 275 rub on a plastic fastener but not the fender liner. My car is lowered 17mm plus whatever extra I got from the slim Manthey camber plates.

NJ-GT

In fact the 315 MPSC is a 325 tire size. No 255 MPSC available, I have the 265/35R18 instead.

Apex Late

Hey Guys,

I have been following this discussion as I am interested in getting wheels and tires for the track for my GT3. I have been told a number of times that the larger rubber will NOT fit the GT3 but it appears that you guys know different.

I just want to be sure that I understand correctly. Quartermile, you are running a stock suspension set up (for the most part) and you were able to get 265's and 315's to work without rubbing? Can you tell me what the offsets that you used for the HRE's were? Do you still have full lock available when you turn the wheels?

I would love to put more tire down and this sounds like it is possible.

jrgordonsenior

Increasing your negative camber will help that combination fit inside your wheel wells. I run 265/315 MPSC's on BBS 9's & 11's without rubbing at RS height on a 993TT without rolling the fenders. 2.5 neg at the rears....

WULF

Just remember it's a trade off if you change offsets to get more width because it narrows the track - though admitedly not by much.

Mikey

NO RUBBING! NO FENDER ROLLING! STOCK HEIGHT. NO SUSPENSION WORK, OTHER THAN -3.0 DEGREE CAMBER ON THE REAR. I WAS RUNNING A BUTTONWILLOW ALL DAY TODAY ... NO PROBLEM!

Larry Herman

NO KIDDING?

Can you tell us what offsets you are running on your front and rear wheels? Seems like you & NJ-GT found the hot setup. Funny, I did the same thing 10 years ago with HRE and my '84 Carrera. Stuffed 245s & 275s on 8s & 9s x 17" wheels. It took them 2 trys, but we got it right. Then everyone else went out & copied me.