Just did the search..
found some pressures all over the map.
I'm thinking around 30 front and 34 rear w/205 55 17's front and 255 45 17's on the rear, they are Pirelli corsa's with a 50 tread wear rating.
This is my first AX/DE weekend in the C4 just wanted some feed back on what you other guys run.

Thanks !

 

I don't know if this is helpful, but I run 35F 37R in my 225/40/18 - 265/35/18 when I autocross or hit the track, and find that to be perfect for my tastes.

 

Rick,

This may not be directly applicable to your situation since I ran larger size Pirelli P-Zero C's (245 front and 285 rear on 18" wheels), but I used to start with 28-30 front / 30-32 rear for the track, and bumped it up by 2 psi for autocross.

 

Thanks guys,

I'll take that into account for Sat. AX and Sundays DE
These are the track tires that came with it when I bought the car
I guess it will be by trial and error