http://www.smartracingproducts.com/s...able-cw-v3.pdf
Great toe conversion chart..carl

 

I was the guy who was concerned about T1 at Lightning - car was wicked under late braking, especially on the right side of the track during a late pass. But I think T1 at the Glen is different because there is no compression. My car was great there. Of course, I also had the DSC box at that point so that confuses things.

 

Has anyone actually spun as a result of the rear end wiggle under hard braking? Or should we assume that if someone doesn't bother added more rear toe, they will just have to live with a dynamic rear under hard braking conditions?

 

6mm of toe reminded me of the factory spec my 91 NSX had . It ate tires to the cord in 3000 miles of street driving. There was actually a class action law suite started. I backed off the toe to 3mm total and got about 9-10,000 off of the rears. it was a little lose but worth it.

On my new GT4 im running .154" =3.88mm total toe . i ran .078 = 1.96mm total on my first GT4 and it felt OK the two times i tracked it but i was driving at 6-10ths getting a feel for the car .haven't tracked the new one yet but it seems to rotate easier(maybe my imagination) with the same camber as my first one -1.9F -1.5R and bar setting F-m R-full stiff

http://www.nsxprime.com/nsx-faq/tire...els/alignment/

 

People often overlook how powerful running more rear toe in is for settling down the rear end under braking. Remember that the bumpier the track the more the toe changes as it goes through bump and droop. When you can't run rear monoballs and don't have an LSD, adding rear toe can give you the stability you need. I wouldn't be too concerned about the rear toe for tire wear as the additional static negative camber you're running will have more effect on premature/funky wear than the toe will. The camber will have a greater effect on uneven wear than the toe.

 

Of note, I believe that our GT4's are the only "GT" branded cars PORSCHE produces that do not have adjustable rear toe links ... Going to race the fastest thoroughbred horse in the Kentucky Derby but, oh yes, I will have to hobble his rear legs so he can't outrun the others ... nice analogy don't you think?

 

Actually 996-997 GT2's, GT3's and RS's aren't factory equipped with adjustable rear toe links either. In the 997-series street cars only the 4.0 and GT2RS have adjustable. 991 GT3 doesn't. However, the factory rear toe eccentric on the rear-engine cars do have a better range of adjustability. But many people replace them with aftermarket adjustable rear toe links anyway to improve performance and adjustability. It seems that replacing the rear toe links with an aftermarket adjustable version on rear-engine car is more accepted.

 

My mistake, should have said better range of adjustability