Camber question
 

Took my car to a local race shop for corner balance and track alignment. They measured the camber and told me it was already set up well, especially for Sebring with more negative camber on the front left. They made no changes.

Front camber: left -3.0/ right -2.8
Rear camber: left -2.7/ right -2.7

This seems fine but I have been under the car and there are no shims in the front control arms. Is this front camber measurement even possible without shims? I've read the threads about geo set up and thought the car wouldn't go beyond -2.

Thinking about taking the car to another shop for a second opinion.

Are you the original owner?

No I am the second owner and was told the prior owner did not track the car, so I assumed it had a stock setup. I am happy that it is already where I wanted it, if I can believe the readings.

The max that my alignment shop could get in front was -2.5....

FWIW, I'm running the same camber numbers.

It is absolutely not possible to have -3.0 without shims! If they set up minimum possible right height, you can might get maybe -2. With standard right height not even that much.

Thanks for the confirmation guys! Looks like those are the numbers I want but a figment of someone's imagination on my car at the moment. So I am headed to another shop for a set up.

I maxed my camber without shims... could not get to 3 but ~2.5 was doable

My car stock with no shims maxed out on one side at -2.2 so that is where both were set. -1.8 rear both sides.

OP you'd want to check and see if the strut tops have already been rotated. I don't know the 991s but back in the 997s a high-2 camber is possible just by rotating the tops.

The alignment expert at my dealership told me that, unlike the 997, the strut tops on the 991 couldn't be rotated.

BTW, I'd like to correct my earlier post. I checked my paperwork and the max negative camber I got at the front was -2.2; not -2.5. Memory glitch....

Did you manage that without alterations to the wheel housing at the back?

I just booked a track geo for my RS with the Black Falcon race team in Nürburg. They have a couple of road GT3's and one RS. I was told that they could not achieve ideal camber, which they reckon is 3, on the rear due to the 21 inch wheels. They have been testing at Ascari and Portimao over the winter and were able to get much more performance and tyre durability from the std GT3 because the car allows more camber at the back. They are now looking into how to address this, but expect it cannot be achieved without altering the wheel housing.

No modifications?

-2.7 rear is fine for Dunlops, -3 would maybe needed for Michelins due to only the outside of the MPSC2 wearing.

A big help is running the car stiff PASM and IMHO the rear sway bar should be full stiff for max tire wear and a more stable car at hight speed cornering.

Porsche did install new front fender liners, now no rubbing with -3 front.

Do you know if the "new" front fender liners Porsche has installed on your car is different than front fender liners the car came with ?

Yes different.

Most obvious and maybe only change is the new indentations by the corner lights.
On my old straight liners that's where the biggest holes were.