Cupcar

I want to replace the clutch and disc in my 1992 Cupcar, which has a single mass flywheel, with a heavier duty unit that can be driven on the street. I have done some research and discovered the following:

964 C2/C4 cars before 1992 used pressure plate part number (PP) 964.116.027.00 with 8800-9600 Newtons clamping force (N)

965 Turbo 3.3 cars used PP 964.116.028.91 with 12500-13400 N, hence the Turbo's clutch pedal was changed to decrease operating force.

964 C2/C4 cars after 1992 used PP 964.116.028.90 with clamping force increased to 10600-11500 N, the clutch pedal for these cars was changed to the Turbo's as above to decrease pedal pressure. My car has this set up with part number 964.116.011.30 driven disc.

965 Turbo 3.6 and RSR 3.8 cars used PP 964.116.028.53 with 14000-15000 N. The RSR used the clutch pedal assembly as for the 3.3 Turbo/1992 on C2. The 3.6 Turbo has a completely redesigned pedal assembly with new over-center spring to lower pedal effort.

In looking at the parts book it appears (although it is not clear) that the clutch cover now recommended for all 993 cars is the 3.6 Turbo unit

So, my conclusion is to use the 3.6 Turbo/3.8 RSR clutch with the later sprung disc 964.116.011.61 as used in the single mass flywheel M003 993 RS car. Has anyone done this and how did it work for you or is some other combination better? Thanks

David K.

Here's the setup I have been running in my 93 RSA.

RS Light Flywheel and Clutch Parts:

964 102 239 31 Flywheel
964 116 011 61 Disc
964 116 028 90 Pressure plate
944 116 080 01 Bearing
950 116 813 30 Tube
964 114 143 31 Ring
931 102 111 00 Bearing
928 102 151 01 Bolt
n 014 715 3 Clip

This setup has be in my car for the last two seasons with 47 track days and ~ 5700 track miles. I just had the motor out and the clutch has minimal wear. My car put out ~240 rwhp on a mustang dyno.

Cupcar

Thanks, your set up is the same as I have now with the exception of the driven disc as I have the earlier RS disc with the part number ending in .30 instead of .61. I'm going to try the RSR/Turbo pressure plate and I'll report how things work.