Exedy twin disc on Evo IX. Built shep 6 speed, and built 2.3 buschur engine. Car has urethane mounts.

When I take off from a stop, I get a bit of a vibration in the clutch pedal ONLY if I rev it higher and try and take off rather quick. This vibration is only present as the clutch starts to "Grab".

I would say I notice this if I raise the rpm to over 3k or so.

If I only raise it to say about 2k or if I am taking it "easy" I never notice this.

I know that the clickity-clack noises are normal on a twin disc, but I am curious if others experience this as well. It is not a heavy vibration but you can feel it a little in the clutch pedal, only when it's starting to grab and I'm in that zone of the clutch. This kind of scared me, and when I try and "take off quick" it tends to make me nervous.