Technical WHAT THE HELL?

When the face of the bearing is too thick or wide, the bearing face will flatten out the finger and start running further up the fingers on the pressure plate and will have less leverage to push the fingers down with ease. At least that makes some sense to me. You guys would not believe the force it is taking to depress this clutch.

 

I think the face differences he is referring to , is diafram vrs 3 finger press plate

 

what does that tag on the flywheel up at the top of the pictures say? I think it has a "ys" on it - Hays? maybe. Any useful info there?

 

please post the fix.

 

Think about it for a moment and you'll get it.


The radiused face will give a smooth transition almost like a rolling action as the face of the throw out bearing presses on the fingers.

A throw out bearing with a flat face will not and might even cause premature wear on the clutch fingers from being in contact with a relatively sharp edge.

 

I think it is Hays. Didn't see it at first. Still, the clutch has to be approved too.
It's not a Lingenfelter. We can be sure of that.

 

On a Long style (3 finger) clutch, the fingers themselves have radiused ends to contact a flat throw out bearing. On Borg & Beck type (diaphragm) clutch, it's the throw out bearing that has the radius. The 2 systems parts can't be mixed. There has to be a radius involved between the T/O and fingers to allow the fingers to move smoothly.

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Correct. I can't find a picture of the one you need. I know what it looks like .
A flat face t.o. bearing will work on a diaphragm if it has curved fingers. It won't work on yours.
You got it apart . Figure out who made it .Call them. If there are no markings or SEMA stamp, technically , it's not legal anyway. Is the bell housing in 5 year cert. ?

 

Thanks for the replays on throwout bearing type. I purchased a "clutch kit" with disc, pressure plate and throwout bearing from a local parts store. The bearing is flat and (not 100 % sure) and I think the fingers are also. I have had some chatter when the friction surfaces come in contact that wasn't there before. So the flat vs curved bearing has got me thinking.

 

Awesome knowledge here, very kool. However, I hate you. Not in a bad way, just sayin. The car, the clutch, the engine (seeing "291" on the hood), what I imagine as you dump it at, what, about 5500? I don't think it's possible to hate on it any more, or indeed any nicer.

Fuckin awesome...

 

With that much stackup of floaters and frictions, your linkage could be

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Shoot... sorry... The geometry of you linkage could be less than optimized. Did so.eone convert to a hydraulic throwout system. I agree, the wear marks on the diaphram fingers look too outboard...

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Something amiss with the stack too, the stands should have 3 threads exposed, if a floater is upside down you'll be pushing rivet to rivets. I understand the pics may not be exactly what you're running at the moment and its possible the pics are from fingertight mockup.

 

Its miss matched parts as is. But to your Q; Rounded face TOB can stay in contac at center of plate arms as they move . Its a race only part,bad idea to use on street.

 

Thanks for all the help from all of you. Keep it coming. the tag on the flywheel is the SFI inspection tag for drag racing. I did called SFI to see when certified and who made the clutch. It is a MR. GASKET CLUTCH. It was certified 1n the late 8Os. I do think the clutch is complete, but T/O bearing was not the T/O that came with clutch. It grabs hard. My corvette has 650 gears, spool and huge slicks It does not like the street. We [as in all of you guys] will get through this. thanx again.

 

It was sold as a Mr Gasket clutch but somebody else likely built it. You could check to see if Mr Gasket has any information available. I seem to recall them being involved with Hays and both are owned by Holley now. The late 80s might have been a hydraulic throw out bearing but you seem to have mechanical linkage.

 

Engine man, thank you. a am doing some research right now on the clutch. that will be very helpful. I will keep in touch. Every H.A.M.B GUY OUT THERE. THANK YOU. I will get this back on the track. I do have the car running now with different clutch. I am taking the corvette to the TUCSON DRAG REUNION May 5th and 6th. see you there.