clib

Does anyone know if the 993 Cup cars used the same front calipers as the 993TT (except black)? I came across a used set at a good price advertised as such, same piston diameters.

thanks

Steve Weiner-Rennsport Systems

993 Cup cars used the same calipers and rotors as the 993RS; TT calipers up front and RS calipers (bigger pistons) on the rear.

clib

thanks Steve!

Bill Verburg

Depnds on the year
They all used the same 322x32 RS 1 piece fronts front, most changed to 32x32 2 piece tt front rotors right away.

in back there were 2 different setups
early used the 964RS which is the same as the small stock 993 rear calipers on 299x24mm normal 993 rotors, later ones used the bigger 322x28mm rotors used on RS and tt and the bigger RS 30/36 rear calipers
As seen on these



red, but still the small 30/34 caliper and 299x24mm rotor







front


front w/ 1 piece 322x32 RS rotors


w/ 2 piece 322x32 tt rotors

clib

thank you again Bill. I do not know how you assembled so much knowledge of these details, much of it seems to be first hand as well.
How did the early cup cars deal with the front bias using the smaller rear set up? I realize those cars are lighter. I have been assuming with TT fronts on a C2 for instance with stock rears would be much greater shift to the front.

Bill Verburg

There were 5 993 Cups at the Club races today, There are usually 2 or 3 at any given track day, and I've spent hours kibitzing w/ the owners and the mechanics that maintain these cars. Today I learned about 997 Cup S, something I had never even heard of before but it was turning PCA record times of just over 52sec at LRP

that's my car in the background