I'm trying to get a hydraulic thow out bearing ("HTOB") to work with a stock flywheel/clutch and pressure plate. The HTOB expands roughly 1/2 of an inch and when I tried it the clutch didn't seem to fully disengage (I heard some 'scuffing').

Does anyone know how much the Throw Out bearing/pressure plate fingers need to move to fully disengage the clutch?

Thanks!


'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi