I am looking for some wheel alignment specs a bit tighter than porsche specs for an 01 996 C2, tracking 2-4 times/year. I would like to have an estimate on tire life of any particular settings suggested. I am running 18" wheels.

Thanks:
James Greer

 

When you connect the wheel to the allignment machine there are some cars to choose.
All of us know that in 996 series there is not a 911 Carrera S version

If you choose this option in the machine, you'll get the same allignment for you C2 as C4S with M030 suspension.
It works very good

besides, here you have some specs to make your car similar to X74 suspension:

 

Standard US suspension

 

Ups
I read in you signature that you have H&R springs...

Did you change the shocks too?
So if you have OEM shocks I think you could do what I told you in the former message ("996 Carrera S" allignment)