Hello all,

I do a lot of driving schools and DEs at several road tracks throughout the country and am getting a 2011 GT3 next month. My previous track car was an '06 Cayman S that I just sold and I was very comfortable with the alignment settings I had (Front: -2.0 camber both wheels, neutral toe / Back: -2.0 camber both wheels, total toe in of 0.25)

What GT3 alignment settings would you recommend in general for road tracks ?(mostly clockwise) - I don't want to change settings for each track. I'll probably just drive it stock (not sure what stock settings are) for a while until I'm more comfortable with the car and get some seat time under my belt before I change the alignment.

Your suggestions/opinions would be appreciated. Thanks.

 

I have -2.5 camber on the front, -2 camber on the back. I also drive the car from and to the track so more camber than this (especially at the rear) would kill my tyres on the road.

 

What tires will you run?

 

Haven't decided yet. Let's assume MPSC that come with the car. I may do R888?Nittos or even RE-11s if I drive the car to the track. Thanks.

 

OK.

Hoosiers I ran -2.5 all around, but with RA1, I reduced rear camber to -1.7.
Hoosiers corder perfectly down the middle, while the RA1's outside of the tire did not wear at all.

I think RA1 will be similar to MPSC. take RA1 over RA1, just shave to 4/32nds. Drivable to the track, not so much on the way home, if it rains.

1 mm toe out front each side and 2mm toe in rear each side. I would not lower the car too much when yyou corner balance, just 10mm.

 

Any other opinions/setups? Thanks.

 

Here is the current set up on my 2011 GT3, I did however cord the inside edge of my front tires after 6 track days so I'm going to reduce the amount of Toe-out to see if that helps. I had good even wear on the rear tires and could have gotten a least 2 more heat cycles out of them but decided to change out all 4 since I had new ones at the track.
Alignment spec's as follows:

Setting for Hoosier R6's

front -2.7 deg camber
rear -2.5 deg camber
front 1/16 total toe out
rear 3/16 total toe in

 

That's on Hoosiers I assume, I had the same allignment and had perfect wear

 

All my alignment specs are in degrees. Can anyone covert my toe setting to mm and also inches? I'd like to see how my specs compare.

I am on Toyo R888's. Street/track car drive to and from events. My street ries are wearing very well too.

FRONT
camber -2.3 degrees per side
toe .02 degrees per side

REAR
camber -1.9 degrees per sid
toe .14 degrees per sode

 

I'm assuming it's for a new GT3 with 19" wheels? The width of the wheels and the lower profile of the 19" wheels compounded with the stiffer chassis will all have a bearing on your setup. I'm sure all this advice is good if it pertains to the above criteria (2010+, 19" wheels) but you'll probably find you need less overall camber. Of course, your driving style will have a bearing as well!

I don't even own a GT3 but study setup a lot and ask a lot of questions. I'd probably run -2.2 front and -1.9 rear for a MPSC, R888, Nitto etc. If you move to a HooHoo, go up a little and invest in a good Pyrometer.

*I did run 19" wheels on my car at the track for about 15 days this year so the above is confirmed by my experience on my 06 997*

 

You probably already been tracking your car, but here are my 5 cents
The factory is about camber -1 deg all around.
I had my GT3 2010 alligned today for mixed road and track. The recoemndation from the shop
Tires PS Cup
Camber -2.5 deg front, -2.0 deg rear
Toe neutral front and tad toe in at rear
Caster 8 deg (Stock).
Was told the PS cup like more camber but will create too much wear on the road.
Watch for Tire pressure. The PS Cup likes 36psi at 39psi they feel greasy.

 

Probably real dumb question... (but I'm a finance guy What will your new setup do for you on the track? I have 2000 miles on my '11 GT3 and have left everything stock (I hate dealers). I've only tracked for a year now and probably couldn't tell the difference but so far my car feels fine. Specifically, going from -1 deg to -2.5 deg camber. How(what) does this help? Toe change?
Maybe I need to google this stuff but just thought I asked my fellow rennlisters.

 

Well one thing it does that you will for sure notice is wear your tires faster. If you do google those terms and there are some diagrams those will help you understand how the wheel will look with an increased amount of negative camber. Negative camber helps with the contact patch of the tire on the road while cornering.