for factory stock alignment specs? It appears that my recently aligned Turbo has the rears angled more than the fronts. They appear to be leaning more towards the inside tread. If I won't be tracking the car, wouldn't it be better to straighten them out?

 

I have a similar question... I had my wheels changed today and had new rubber put on. I noticed that on my old wheels that the rears were worn to the bars on the inside of the tires and the outsides still had a little rubber left. Is this common with ROW shocks and springs or stock suspension set to the appropriate alignment specs for each? The fronts were worn pretty even...

 

Camber (the degree of angle from vertical) you see is normal, at least in the regard that it should be more pronounced in the rear.

I don't have specs handy for 996T, but for the 993 Turbo, the front spec is -0 degrees 30 minutes and the rear -1 degree 25 minutes. So in the rear, the angle is about 3 times as much as the front.

This will lead to uneven wear on the inside of the tread, especially on the rear, but that camber helps keep the back end planted solid in turns.

I'm no suspension guru, so I can't offer much more detail.

 

I intentionally had this done on the rears when I had the ROW suspension installed. I was getting major wear on the outer 1/3 do to AutoX & Track Days. I was thinking this would even the wear and provide more rear stick in the corners. I haven't tested the theory yet (car just came out 3 days ago and straight into the shop for an attitude adjustment) but am anticipating the set-up may promote a bit of UNDERstreer. If so, the front will have to be adjusted with a little - camber also.

If you just drive in straight lines, this set-up is probably not for you or you need to do a little more track time

Mike

 

my experience is that the car has a negative camber setup. For one to use the tire tread uniformly from outer to inner, the car must experience fairly aggressive driving. On the continental sport contacts, on either side after the tread ends, there is a circle of round divits (looks kinda like a design). What they are there for is to show a driver how much s/he is using with the current suspension. So, if you have scuffed the tire evenly from side to side near the round divits, you are using your car likely with very aggressive turning, cornering. if the outer half of the tire, assuming a correct setup, is not worn enough then it may be better to have the suspension set on a less aggressive setting for more even wear. hope this makes sense

 

Thanks for all the information you all provided. Very helpful

 

you got to have camber in the rear and fronts if you want your car to hook up on the corners. i intentionally added a little more camber to the rears 1.5 deg. that is why it is important to rotate your tires every 3500 miles. to even out the wear. i think the average tire lasts about 10,000 miles. you will go through 2.5 sets or rear tires for every front tire change.

 

Good info Ruiner, I'll keep these numbers on file.

eride996: I had a strong feeling that you have to "pay to play" when it comes to this or any other car of this caliber.$$$$$$