RENEW1 Yes I have had A BIG problem with centerforce clutches.
My car would not shift over 3 k rpm after installing there whole clutch assembly. I was told from there tech many things, Bellhousing out of center, yes it was .038" I spent 3 hours to center it perfect, less than .002". Reassemblyed same shifting problem. I was running a 6 spds Richmond, was told the problem of shift was in the trans,(new Trans) Shipped it back to Richmond and was checked out, NO PROBLEM FOUND, reinstalled trans, same problem would not shift over 3 K. My motor makes more tork than the rate for the 6 spd calls for. I called G-Force and had a 5-spd clutchless trans with shifter sent. Installed it and same problem. Call centerforce again and was told it is not the clutch. I said B.S. I asked how the wieghts work on the pressure plate, was told the faster the clutch spins, the more pressure is put on the fingers of the plate. A semi lockup clutch is what it is. Anyway I REMOVED the ring and wieghts, The car can rev to 6k and no shifting problem. I am not sure 100% but I think that the clutch with wieghts needs a hydro thrown out bearing. The stock ERA system make not produce the pressure needed to disengage the pressure plate over 3K rpm. The other thing could be the clutch fork could be bending. I am using a dual disc from Mcloed on my next motor. I have burned up the centerforce clutch from drag racing. I am guess the pressure plate is only good for a 2600 lb car with out wieghts. This adventure cost me 6,500.00 dollars total. I did the work myself. The clutch I have in the car is a ZOOM. I think it is stamped borg and beck on it, just a name. If you want to talk call me 732-254-3536 est in the evening. I hydro bearing will need a clutch pedal stop to pervent over extension and blowing apart. Rick Lake Ps Centerforce is off my Christmas list forever