C-1 Clutch and Pressure Plate

[Jerry C.]

Noticed Clutch kits are different for FI/Hi-Perf. than standard kits. Anyone know the difference? Thanks in advance.

[Joe L.]

Re: C-1 Clutch and Pressure Plate

Jerry-----

GM never originally used different clutches for different engines in the C1 era. In fact, all 1957-62 Corvettes, regardless of engine used, basically, the same clutch set-up. There were some part number changes over the years, but the basic specs didn't change.

In the aftermarket for replacement clutches these days, I suppose that they may offer different pressure plate spring pressures, with the HP engines getting a higher spring pressure.

[Dennis A.]

Re: C-1 Clutch and Pressure Plate

All 56-62's use a 3 finger clutch, Isn't the other offering's for a multi-finger replacement? I know that a 10 3/8 inch clutch disc is recommended for higher horse power engines over the original 10 inch, could this be the reason for the two offerings?

[Joe L.]

Re: C-1 Clutch and Pressure Plate

Dennis-----

I think that most, if not all, of the currently available C1 replacement clutches are diaphragm style units (i.e. "multi-finger"). The friction disc size could be another difference between the available units.