black993man

For those of you who've lowered your 993s and attempted to properly dial in camber settings I'm curious if any have experienced problems getting enough adjustability to meet RS tolerances in the rear?

After installing PSS9s and RS sways recently I took my car in to the shop with instructions to strike a middle compromise between RS and RoW settings (I had already set ride height at RS specs and achieved weight balance -- dumb luck on the latter). What I got back was -0.6 camber in front with little or no toe and -1.9 rear with 0.16 deg toe. The wide split in camber front to back was something of a question in my mind and proved to be miserably understeering in a subsequent AutoX. 2nd attempt at the alignment I asked for more negative camber in front (1 deg like RS) and less in rear to strike tire wear/handling balance. But the shop informed me that most positive they could eek out of the rears was -1.9/-1.7 L/R. So now the F/R split is less pronounced but still not ideal.

Have others run into problems getting the rear correct when lowered?

Thx,
Chris

911

Chris,

I have not experienced any problems with my setup. I have PSS9s w/ M030 sways and have neg 2 degrees up front, and negative 2.5 degrees in the rear.

cabrio993

I am also lowered just above RS specs by a couple of mm's. My settings are very similar to yours and the tech said that the most positive I could go at the rear camber was -1.7. I sit at -.04 on front with little or no toe in.

He also mentioned that he could not set the Kinematic because he couldn't put the gauge on the A-Arms as the angle was too much. My handling is very neutral and have almost no understeer. So, it handles great on turns but it feels rather nervous or twitchy on the straights, kind of unsettled.

On a previous alignment, I had more positive Toe in in front and rear, which made the car feelt very settled on the highway but it understeered like a pig on the turns.

OldGuy

Rich, keep an eye on your drop links and start budgeting for TRG sways. My drops were stressed by the PSS9's and both rears popped out and on my first track day!! Luckily Scott B had some TRG sways from Viper Bob and Bob fixed em at the track.
Just watch em close. now that youre a track animal I dont want you to miss a day like I almost did!!

FisterD

After lowering:
front l/r.........camber -0.5°...........toe 0.02 in.
rear l/r..........camber -1.6°/-1.5°...toe 0.09 in.

Matt Vaughan

I'm at RS height, perhaps a bit lower and I have -2F / -2.2R -- no camber plates.

cabrio993

getting negative camber at that height is not the issue. I think he wants more positive that -1.4 on the rears to better match the front camber if I am not mistaken.

black993man

Yep. cabrio993 is correct. I'm looking for somewhat LESS negative camber in the rear to match the RS specs of -1.3deg. Many of you seem to be running much more aggressive negative camber setups which I'm sure handle great, but I no longer work for Michelin and would rather not be shelling out for new tires every 8k.

Thx,
Chris

jrgordonsenior

I can't seem to get less than 2.5 in the rear at the eccentrics largest setting. It was explained to me that as you lower the car, the camber becomes more negative, and you can only adjust the eccentric so far. I went from 1.7 neg at about 25-3/4" AFF to top of wheel well, to the 2.5 neg when I lowered another inch. Fronts are 3 neg with monoballs & camber plates.

911XTC

Chris, I sent you an email....