Hi Phil,
You have the perfect example of a slipping clutch,,, and the problem is
mechanical as is always the case.
Basics: pressure x area x friction = holding ability.
pressure is generated by the spring or springs: are they weak? Is their
pressure stroke being wasted because of too much "reach" before they apply
themselves to the plates? (too much clearance or a bent push rod or plates
hanging up on notches worn into the basket slots or maybe the hydraulic
system not releasing)
area is only an issue when the power becomes so high that it overcomes
proper pressure and friction.
Friction is decreased by "glazed" plates and or oil additives and the
differences in the oils themselves.
Most of the trouble comes from the slick "glazed" plates.
Have you sanded the glaze away and checked your trap speeds???
Glaze is created by the heat and pressure within a slipping clutch and
serves to make the clutch slip even more.
Your clutch is glazing because of a pressure problem (see above) or your
launchs off the line where you are slipping it on purpose to come off "Hard
and Fast". Nothing wrong with doing it like that (That's the way the fuel
dragsters do it) just be aware that you're going to have to deal with the
glazing (just like the fuel dragsters do) by freshing up the clutch between
runs.
Robert
Costa Mesa
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