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I am starting a new thread on track alignment for the 992 GT3.
I was going to order shims for a track alignment today, but got stumped a bit. I started by calling my dealer's parts department and they told me that the shims for the front and rear are the same as the 991. Before ordering any, I went to look at the length of the bolts coming out of the monoballs the rears did indeed look the same as the 991 and had 20MM of thread beyond the nut to add shims (not that you need 20MM, but it's more than enough). Kind of that football shaped shim.
However, the fronts look to be a whole different kettle of fish. On the 991 the inner monoball end was retangular (shaped like the shim) the bolts where inboard under the LCA. On this unit, the bolts are vertical, not horizontal, and arm is therefore taller, but no less wide. And there's only 10MM of thread beyond the bolts now.
Moreover, on the top of the upright, there is an eccentric bolt that looks like it can push the top (not the bottom) can adjust the unit in or out. I am not a suspension expert, but I don't think the square shims from the 991 are a.) going to fit, b.) the right/only answer here. Does anyone know if the camber adjustment on this new double wishbone suspension is done from the top now with an eccentric bolt instead of (in addition to?) the bottom using shims in the LCA. Also, if there is a new shim for the LCA, does anyone have a part #?
Here's the rear. Very familiar, looks like the 991, and has plenty of bolt length to add "football" shims. Note the part # is visible.
Here's the front. Looks very different than the 991. Vertical bolts, bigger overall. Not much thread to add shims
Here's the part # on the front LCA
Here are old shims from the 991. Rear on top, front below
Here's the eccentric bolt on the top of the upright. Is this the new way to adjust front camber?
For a track-focused alignment I am thinking that my starting point will be:
Front: -3 degrees of camber Toe-out 0.5MM each side, and whatever caster I can get and still have the wheel fit in the well.
Rear: -2.4 degrees of camber Toe-in 2MM each side (-2.7 camber on the RS just wore the inside edges of the tire more without any noticeable increased grip)
Sway bars at middle front and rear
Ride height stock front and rear
Someone early on had posted an article that showed PAG recommended track alignment in conjunction with street alignment. In involved changing ride height as well.
I am starting a new thread on track alignment for the 992 GT3.
I was going to order shims for a track alignment today, but got stumped a bit. I started by calling my dealer's parts department and they told me that the shims for the front and rear are the same as the 991. Before ordering any, I went to look at the length of the bolts coming out of the monoballs the rears did indeed look the same as the 991 and had 20MM of thread beyond the nut to add shims (not that you need 20MM, but it's more than enough). Kind of that football shaped shim.
However, the fronts look to be a whole different kettle of fish. On the 991 the inner monoball end was retangular (shaped like the shim) the bolts where inboard under the LCA. On this unit, the bolts are vertical, not horizontal, and arm is therefore taller, but no less wide. And there's only 10MM of thread beyond the bolts now.
Moreover, on the top of the upright, there is an eccentric bolt that looks like it can push the top (not the bottom) can adjust the unit in or out. I am not a suspension expert, but I don't think the square shims from the 991 are a.) going to fit, b.) the right/only answer here. Does anyone know if the camber adjustment on this new double wishbone suspension is done from the top now with an eccentric bolt instead of (in addition to?) the bottom using shims in the LCA. Also, if there is a new shim for the LCA, does anyone have a part #?
Here's the rear. Very familiar, looks like the 991, and has plenty of bolt length to add "football" shims. Note the part # is visible.
Here's the front. Looks very different than the 991. Vertical bolts, bigger overall. Not much thread to add shims
Here's the part # on the front LCA
Here are old shims from the 991. Rear on top, front below
Here's the eccentric bolt on the top of the upright. Is this the new way to adjust front camber?
My mechanic at the Porsche dealership looked the car over to get it track ready and told me he needs different shims than my .2. Not available yet. Also seems that none of the dealerships have had any tutorials yet. If you work on the car yourself good luck.
Also interested in hearing what people find to be a good track setup over time. Ill probably start with Porsches recommended track settings and adjustment methods, as described in the On the race circuit manual:
Looks like wheels need to come off for camber adjustment? The shops I've been to with my 991.2 adjust with wheels on. I think special equipment is needed if wheels are to be off?
I went to the Porsche dealership today and talked to the parts manager. He pulled of the 2022 992 GT3 parts schematics and they don't list any shims for the front or the rear. He said often the schematics start of light and get additional parts over time. Not having then shims on the rear seemed odd as they are the same as the 991s.
I think that leaves adjusting camber from the plates up top in the frunk, and with the eccentric at the top of the upright. Won't be able to push the bottom out, only pull the top in, so there's only so much clearance before the wheel/tire hits the springs. I am going to give it a shot this weekend if not sooner. It looks like it has -1.4 degrees from the factory. Will report back.
Also interested in hearing what people find to be a good track setup over time. Ill probably start with Porsches recommended track settings and adjustment methods, as described in the On the race circuit manual:
Thanks for posting - any chance you could scan that whole track manual? Appreciate it
I would bet 311RS has more info...and since they want us to buy their hoop, I'd hope they will share what they know. Suspension looks very similar to the cup - aside form uprights.
I would bet 311RS has more info...and since they want us to buy their hoop, I'd hope they will share what they know. Suspension looks very similar to the cup - aside form uprights.
I placed my order yesterday. If I get time soon, Ill call them.
I had an initial alignment done that came very close to the setting in the "track manual" except the rear was not lowered 5mm. On the track under braking, particularly pronounced when braking with any kind of steering input, the rear end shimmy's and becomes unbalanced. I've got it back into the shop today to have the rear lowered as the manual says and taking it to the track again tomorrow. Other than this the suspension and aero changes are legitimate and and is a real step up from the 991 on track IMO.
I had an initial alignment done that came very close to the setting in the "track manual" except the rear was not lowered 5mm. On the track under braking, particularly pronounced when braking with any kind of steering input, the rear end shimmy's and becomes unbalanced. I've got it back into the shop today to have the rear lowered as the manual says and taking it to the track again tomorrow. Other than this the suspension and aero changes are legitimate and and is a real step up from the 991 on track IMO.
Supposedly, the rear naturally lowers 5mm when you increase the rear negative camber to -2.25° (Same as -2° 15)
Sounds like you may want to confirm rear toe is correct.
I assume you did corner-balancing with your bodys weight worth of ballast in the seat?
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992 Track Alignment
