[DeTomaso] clutch?

[JDeRyke at aol.com]

The std Chev diaphragm clutch is known as a 'straight-finger' diaphragm, and 
that type usually called for a radiused-face throwout bearing so disengagement 
forces were more-or-less linear. Using a flat-faced throwout bearing on a 
straight-finger clutch gives the non-linear results you describe, due to the 
ever-changing angles between the fingers and the throwout bearing surface. 
Centerforce pressure plates use a bent-finger diaphragm that does give a more linear 
disengagement with a flat-face throwout. So the pedal feeling won't be quite 
the same, and radiused-face throwout bearings are not common for a ZF mount 
system, but could be adapted, I guess. FWIW, I got this tip from Mac Tilton who 
has built a few clutches in his day.... Good luck- J Deryke


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