No joy there, the charts I have show the EA81 at over 200 ft-lbs at 3000
rpm, climbing from there and not dropping below 200 through 6000rpm.

Charles

Dan Horton wrote:
Gordon says:
It works because the springs have a preload of a certain force and
will compress only when torsional oscillations reach a certain
amplitude.

Gordon, this is YOUR lucky day! You've bumped into the only guy on
the net who has actually measured the spring rate of clutch disks.
Gosh, Subaru, Chevy truck, Ford truck, Suzuki, a few others too! Let's
look at the spring data for an EA81 2WD clutch disk. No trouble, got
it right here on my hard drive.

Everybody draw a plot, torque up the left side, degrees rotation
across the bottom. Ready? Draw a straight line from 0-0 to 40 ft-lbs
at 3.5 degrees, and from there, proceed straight to 162 ft-lbs at 6
degrees. At a tad past 6 degrees, the springs bottom and the spring
rate becomes near infinite.

Gordon, you got that? Please show us the "preload" that "will
compress only when torsional oscillations reach a certain amplitude".

Dan