That's per wheel. So .50 toe total.

 

Why that much toe? With a stiff enough suspension and monoball rear arms and solid pucks, toe and camber change in corners should be less than a stock setup, no? Seems like the rules we state about alignments often don't take into account suspension and control arms. So we fix some of the negative suspension attributes in the rear with monoball and removing rubber and still align like we need to combat those very things. Maybe I am missing something you guys can help me understand?

Here is what the 996 Cups call for as a reference. They have different weight distribution, but tire widths are pretty similar.

 

Wondered that as well, but all the research said keep it to around .25 a corner. Seems to be working.

 

.25 what?? I'm assuming you are listing degrees. Factory specification is not listed in degrees but rather in minutes, specifically 15-17 minutes (') per side or 30-34' total. 1 degree = 60 minutes. Thus, on the low end, factory specification is 0.50 degrees total rear toe (or 30') and 0.57 degrees (34') on the high end.

There is a general lack of understanding between the two and this tends to muddy the water a bit. When I do an alignment on my car which is full monoball, I always set up the rear to a total toe of 34' (0.57 degrees). Tire wear is dead on perfect.

 

I do degrees. So .25 degrees per side, .50 degrees total

 

I installed RSS Tarmac LCA's with their solid thrust arm bushings and monoball ends. I too would go through rear tires in 3-5k miles.

I haven't driven enough mileage to definitively say my tire wear is better, but it's actually a difference you can feel. The car feels much more solid and planted when putting the power down, I have no problem believing that my rear alignment was shifting under load.

Fingers crossed that it fixes my problem, but handling and straight line acceleration feels fantastic now. I've put about 1k miles on since I did the swap, tire wear looks even.

(Note: If you do not have a lowered Turbo from the factory, either with the M030 option or "sport" suspension, you cannot run these. If you have lowering springs, you must also have swapped out your stock shocks for the M030 Bilstein equivalent or similar.)

 

i now run .027 toe on the rear with as you mentioned, mo30's and springs. i was still having issues with excessive inner wear until i added TS drop links http://www.torquesolution.com/product-p/ts-por-003.htm which have gained me an add'l ( maybe? ) another whopping 1k miles from my usual 4k miles per set of rears. i started with basic factory x73 alignment specs and tweaked from there ( although that's for a 20mm drop ) and i'm at -40mm (+/-) but ya definitely need something if lowered to adjust camber/toe to adjust for the wot squat that KILLS tires prematurely. in addition to driving style, that is