Martin S.

GT 3 (Street) lower control arms will give you -2.5 degrees of front camber.

Be real careful with front to rear tire combinations. Rolling radius delta, front to rear is critical if you want the ABS to work. I believe a 3% delta is about as much as the system can tolerate...at least this is true on a 993...maybe not the case with a 996.

AudiOn19s

Have prices on the arms come down quite a bit. Last time I priced inner and outer control arms with shims I was still >$800 for parts.

You can get the OEM GT3 monoballs for $300 for the pair which is why I went that route.

92tsiawd

These monoballs are like adjustable camber plates? what place sells these?
Also on the boxster rears, are all years for these rims good or are there specific years with a better offset?

AudiOn19s

Yes but No. All of the designs I mentioned (TRG, Tarett, OEM GT3) use the same design. You're able to orient the plate in two different positions on the car. One set of holes will give stock camber, if the other set of mounting holes is used you get approx. -1.0 degree from where it was stock. That's really the only option. You've got about 1/2 degree of movement in the slots in the shock tower too for fine adjustment. That's why the control arms *can* be a better option. You install various thickness shims between the two pieces to change camber.

here's a picture of the OEM plate for reference.


HOWEVER!!!*** while I can tell you that you can re-use the stock upper spring bearing from your 996 to integrate with the GT3 mounts, I can't guarantee you won't get a ride height change when you use them. I already had coilovers on my car when I installed the plates. If I remember correctly the height was pretty close but not exactly the same as stock. (within 5mm).

Andy

smsarchitects

for what it's worth, I ran GT3 Wheels 8" ET 55 (or 8.5") with 15mm spacer with 245s and 11" ET 65 with 315s on my NB 996 track car. Slight rub on front when at lock to lock but great on the track (and driving too and from).

Patrick E

Good memory, Andy. I really like the way the car handles with this setup, although I also use the more standard 8x18 f, 10x18 r setup. One big benefit of the 17s is cheaper tires!

karlooz

i sometimes run my fikse 17/9x10.5 with 245/315. the rears fit and work well believe it or not. i would like a fatter tire up front though... like a 265.

Paul 996

Karlooz,

I've been running a 275 R6 up front this past year. Worked great. However, I think that a 265 or 255 with the right aspect ratio would be "enough"

My track setup has been F275 F 315. Very soft front GT3 bar and very stiff rear GT3 bar. Actually, I stiffen the rear bar until I start to get excessive wheelspin in corners and then back it off a notch. Keep the car right on balance.

92tsiawd

How does the GT3's 18x11s with a 63 offset fit in the back? Is it bulging out a little bit?

Paul 996

I run an even more agressive track setup on the rear and it sits inside the fender. Negative rear camber is 2.4ish.

karlooz

hey paul,

is there a lot of roll with those wide meats on narrow rims?
i'll try out 275/315 next time. good thing kumho v710s come in that size with 17" rims. no such luck with 18" rims though. i can only get 245/305x18 and the next bigger pairing would be 285/305... the 315 is way too tall.

Paul 996

Yes they are a little fat. I plan to downsize the front this year to a 255 or 265. I really try to keep the OD very much in line between the front and rear.

Here is what they look like on 17s.

JimB

Wow, that's a lot of rubber up front Paul. With the soft front bar and stiff rear I'm surprised you aren't oversteering like crazy from turn in to apex.

What dampers are you using?

Paul 996

Jim,

Running a 04 GT3 takeoff susp. Shocks/springs, bars, monoball mounts, etc.

At first I left the rear bar in the stock GT3 setting and progressively softened the front bar to eliminate mid corner push. Then made a few more minor adjustments on the rear bar (stiffer) to dial in just enough in rotation before apex. BTW: when I move the bars I move one hole on one side at a time.

Also, I do need to be careful not to over turn the front wheel into a corner before I am fully committed on the gas before apex otherwise I do get loose. IE the front really does go wherever I point it.

I have always preferred a loose and fast car. My 2 cents.

karlooz

that's not so bad actually. what wheel widths are you using?