Cormid

Road America is my home track. I am just trying to learn about the appropriate camber setup for the my car. Does you brother recall the specifics of the camber setup for Road America? You list -3/-2 camber. Is that front/rear?

Manifold

That data isn't very relevant to the 991 GT3. Optimum camber is a function of the car, suspension, tire, tire pressure, track, driving style, etc. Factory cambers on the car are -1.5, which appears to be a good compromise between road and track driving using OEM tires. For primarily track use, most people seem to be using anywhere from -1.5 to -3.0. I plan to initially try -2.0 F & R.

gt2urbo

i'm getting to the initial stages of getting a cup car decklid /uprights to be fitted and interchangeable with stock one . i will have gettty design to make them. need 5 people ready to commit to it if you want a mold to be made. the cup decklid is 3900 from pcna. expecting the decklid to be around 1500 from getty. pm if interested. If not I will have the only cup decklid/wing on a gt3 .

Jon70

The cup has the third brake light within the rear fascia between the rear taillights as opposed integrated into the spoiler as on the GT3 road car. Probably no issue if the wing is for track only.

MayorAdamWest

That's sounds really interesting. Not sure I want the Cup wing, as it's gigantic, but I'd be interested in the RS one. Maybe post in orthojoe's thread?

MileHigh911

Yes that was fr/rear for the cup cars being raced there.

est8esq

Lately, I've been driving around 5000 track miles a year and have played w/ many different setups on this GT3 keeping an open mind and seeing what works, what doesn't from technology/data acquisition to fungibles (tires, brakes, rotors).

Don't want to get into too much, but here's what I've found…

Hoosiers (R6) do NOT work on the GT3. Not going to speculate why? I'm not an engineer and have heard enough crazy comments and I hope not to sound like one of them. Have ideas, but bottom line they just don't work. But, I guess all the fun is to experiment and see for yourself. (MPCS's, Trofeos, Pirellis, etc… tried them all).

As for brake pads, I've found the PFC's are far and away the BEST. (Burned up OEM's which were great, ran Carbotech that were also good, tried Pagid and took them off after half life because they don't stop the car under load).

19" wheels are worth the performance difference. Spent several track days running 20" OEM and then 19's, running lap timer and playing alignment sway bars. (Learned that CL wheels are awesome and not the PIA everyone said they were. Modest investment in breaker bar and torque wrench well worth it).

Pragmatically, running race seats with cage/harness on a street car and a hans may not be optimal, but how do you put a price tag or comfort rating on safety? Have seen enough crashes (or been in one to know they work )

I love these questions on this forum and really enjoy knowing people are entering the fray, each and every day. Never ceases to amaze me all the knowledge and differences of opinions. Best of luck!

Manifold

Sorry if I missed the answers in other threads, but a few questions:

- Which tires have you like best? And what alignment?

- What performance difference have you seen with the 19" wheels?

Interesting comment on the CL wheels. I've ordered the torque wrench and breaker bar, and look forward to giving it a try once it warms up around here.

est8esq

PM me and I'll shoot info on tires. I'd prefer not to publicly speak on why I'm so much faster than other GT3's at the track Granted, on straights I'm not seeing much, if any acceleration benefit (which was actually very surprising), but cornering is significant.

I've seen as much as 3+ seconds at Mid Ohio.

MayorAdamWest

Why is a better tire a secret?

997s07

The same reason why everyone wears underwear. Size matters.

jasonfreed

What problem were you having with hoosiers?

I know someone running 265-35-19 and 325-30-19 without any issues.

Were you getting weird abs behavior?

PSM weirdness?

Can you clarify what happened?

Thanks.

FastLaneTurbo

After receiving my GT3 I brought the car to Max Crawford's Race Shop where his
engineers spent many hours in Research and Development of its new Wing.
Max designed a far higher performance, raised Rear Wing for my 991GT3 very similar to the new GT3RS Wing. it is available for $2,960 as a kit for the 991 GT3 including extended mounting Pylons with Dual LED Brakelights installed and wiring harness so that it is a Plug and Play conversion which takes only 30 minutes to install. The raised Pylons put the Wing in cleaner air and give you a Clear View through the rear mirror. They also do not destroy the Wing's Laminar Flow as do our OEM Wings with a brake light stretching across the Wing's most sensitive area. Sport Auto measured the GT3s downforce as being only 65 Pounds @ 130 MPH. That is a VERY low number, and only half of the 991 Turbo's downforce.
I've been tracking it at several HPDEs. IMHO it works great requiring no further Aerodynamic balancing. Their is NO detectable increase in understeer while it reduces any tendencies for snap oversteer under full throttle in high speed corners. It also makes driving on the road much nicer when you can see the traffic, cars and pedestrians behind you. See my Avatar and the photos. As of yesterday, they had 2 completed Wing Kits available for shipment.
FMI Call David Cooper (704) 483-4175 <www.crawfordcomposites.com>





991 GT3 AT SEBRING WITH CRAWFORD WING





991 GT3 WITH GT3RS TYPE WING





991 GT3 WITH CRAWFORD GT3RS TYPE WING





RIGHT SIDE VIEW 991 GT3 w/Crawford Wing





Left Side View with Crawford Wing





Wing W New Pylon Mounted Brake Lights

est8esq

Yeah, judging from your location I think I know who you're talking about too? Saw you guys (or them) at Sebring. Noticed the Crawford wing right away and MONSTER size profile tires from behind and had to chase down the car to get info and compare notes.

If we're talking about the same car, the fronts were running Hoosier R6's and rears were the new R7 compound? (I understand Hoosier is expected to make appropriate sizes by the summer for the fronts in R7?)

Anyway, as I stated I only ran R6 and it's these that I'm talking about. Matter of fact, "Dave", pro racer/coach happened to be right there while we were talking and he too confirmed that our GT3's don't like the Hoosier R6's? He wasn't sure exactly why, but he wasn't getting faster lap times at all, while I was getting slower lap times.

I think that the R6's have too soft sidewalls and the compound doesn't slide whatsoever? Maybe something w/ the AWS that prevents good traction? I don't know, but at least for me proof is in the pudding. My Aim/Solo confirms it.

jasonfreed

Yep - that's the car. I was not there but am friends with the owner. I heard the car was completely fine with the R6 up front and R7 in the rear.

In fact, I have 2 sets of them sitting in my garage waiting for mounting - which is what peaked my interest when I saw your post.

What tires are you using for track duty?