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Looks like you have a little more adjustment remaining for a little less toe in. Oddly enough, left side camber is adjusted to max negative, right side camber almost the opposite. On a lowered car, camber increases in the negative direction, as does toe in, simply due to geometry.
I do not have a lot of experience with Porsche chassis, but on my 2010 997 the adjustment eccentrics are the same left and right. I contributed this to the close tolerances that Porsche builds their cars to.
Are you pretty confident in your alignment guy?
If you request alignment settings that MDRUMS posted, you should be good. This is a street car correct?
Post your before and after settings when you get them.
the left side is maxed to neg camber. The fat side needs to be outward.
^
Exactly, he must have a lot of negative camber especially on the left side. Probably quite noticeable when viewed from behind. Stock wheel offset? Wheels tucked in to clear fenders?
I have 17000 miles on a set of MPSS. Camber -2/-2.5 F/R with total toe at about .25. Thought about tracking the car and decided 22 years was enough. The car does handle nice.
GT3 LCAs in front, TechArt springs.
I have set of Tarett adjustable rear toe links but I did not have to use them on this car.
Also have the Tarett front camber plates which I didn't use.
the left side is maxed to neg camber. The fat side needs to be outward.
Agree with Damon. Thanks guys.
So Wolfgang and Kosmo, let me see if I got this right. You're saying that my right side is adjusted in the correct direction (less negative), but the left is actually cranked very negative? Would this make for uneven wear on the tires? I'm my case both sides seem to have similar wear.
Yes. Re-read post 27. Frankly I can't believe a Porsche tech would do this.
In short
Lower car means more neg camber
The increase in neg camber can be offset by adjusting theses eccentric bolts to where the fat portion is on the outside. HOWEVER these OEM bolts have a limit adjustment range , hence the aftermarket products.
Before you go any further I would recommend you get an alignment reading and go from there.
Close to 80K miles now on two 997's, both lowered on H&R springs. I've averaged a very consistent 9K to 10K miles on the rears with camber/toe pulled in to the limit with the initial drop. I stopped wasting $400 on alignments with tire changes since it had exactly zero effect on the wear I got out of the new set. Michelin and Bridgestone tires only.
The OP's wear seems a little unusual though. Looks like it's riding on just an inch or two. Picture below of one of mine where the wear is just a little wider. Got 9,700 miles out of that set.
It's been about a year since I started this thread, and I wanted to post a long-overdue update.
To summarize, the rear tires (Hankook Ventus Evo V12) on my 2006 C2 (lowered with H&R springs) were worn down to the cords at 7700 miles. Some people were getting similar wear out of their rears, but the consensus seemed to be that my alignment was out of whack (too much neg camber, or incorrect toe). It had been adjusted at the time of tire installation by a well established indy who only works on Porsche.
I ended up switching the tires out for MPSS all around. I took it to the same indy for realignment. His comment was that the alignment was out of whack but this this was caused by normal usage rather than incorrect initial settings. If you look at the attached drivers side photo post realignment, the settings look very different than previous. I've also included the alignment printout for the rears.
A year later I have 9000 miles and 4 autocrosses on the new MPSS and they have good tread (6 to 7/32) left on the inside rears. Thanks to everyone for your help. Any comments on the new alignment would be appreciated. I'm not sure if my new indy does alignments, so I'll have to figure out where to go for the next go around.
I took it to the same indy for realignment. His comment was that the alignment was out of whack but this this was caused by normal usage rather than an incorrect initial settings.
This smells funny. Your rear toe "before" settings were messed up and he's covering his butt so that he doesn't have to pay for replacement tires since he was the last to make any alignment changes. Unless the bolts were loose or you hit something your settings would not go from normal to "out of whack" on their own. Somebody set them up incorrectly.
But as you say your settings were corrected a year ago with your MPSS install and everything has been fine since. Thanks for the follow up!
12-26-2013 | 02:31 PM
