Joe Weinstein

Hi all, a technical question... Is the Porsche clutch designed in any way
to use centrifugal force to increase clamping force with higher RPMs?

I believe that RPMs by themselves contribute nothing to changing the
load on a clutch, because regardless of how fast a clutch as a whole
is spinning, as long as it is engaged, the relationship between the plate
and the friction materials is static friction. But if for instance, we have
a peaky motor that we know will deliver a lot more torque at higher
RPMs, this might be a valuable trick for a clutch to have.

thanks,
Joe

Macster

No. If clamping pressure variable then the amount of pressure/effort needed to disengage the clutch would vary as well.

Besides more clamping pressure is not necessarily dependent upon the engine's Rpms. Max. torque is at a lower Rpm that max. hp. For instance our Turbos develop max torque between 2700 to 4600 rpms. And even below 2700 rpms torque is still considerable and of course the clutch must transmit this without slippage.

A crude test of a clutch's operation is (I do not recommend anyone try this) is with the engine at idle shift into 4th gear and simultaneous with 'dropping the clutch' floor the gas pedal. If the clutch is bad it will slip. If the clutch is good the engine will die.

Sincerely,

Macster.

Last930

I think I would only be able to do that to a rental car !!