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Author Topic:   Another clutch problem
Fomocosho
Member
posted August 24, 2003 08:00 PM
I got a new clutch for my car its from jr motorsports its an ace 10 1/2" stock type clutch and I have a Howe stock type hydraulic throwout bearing. Its suppose to fit behind most stock clutches but when I measured to shim it it will have a 1/16 of an inch of preload. Is this going to be to much? If so is there a bearing that is skinnier so it wont have so much preload? Or what do you guys suggest doing? Id also like to know what clutches most people are using in their IMCA Hobby stocks (a single disc clutch).


Thanks for all the help


Pickel
Member
posted August 24, 2003 08:05 PM
You shouldn't have any preload on that. The throw out barren should be free floating...It shouldn't be touching anything. GM makes I believe 3 different sizes of throw out barrens. I run a stock type clutch with a short barren and it works great.


Fomocosho
Member
posted August 24, 2003 08:23 PM
Is you bearing hydraulic? If so where did you get it? Thanks again pickel


racer17j
Member
posted August 24, 2003 08:47 PM
we run ace clutches for a 79 camaro and howe stock hydro bearing we had to use bolth sizes on the two cars we had


Fomocosho
Member
posted August 24, 2003 10:06 PM
Racer17, what do you mean by "we had to use both sizes on the two cars"? If I put it together I would have preload and thats without any shims. Did you have to add shims to yours?

Thanks

MEANGENE83
Member
posted August 24, 2003 10:19 PM
I use a stock 11" clutch and a cable set-up similar to the one JR sells.


racer17j
Member
posted August 24, 2003 11:40 PM
we ordered the same size for bolth cars but had to get the shorter one for one of them but they bolth needed shimed we had no preload in them it is free like pickle said


mechanicalman
Member
posted August 25, 2003 07:34 AM
It sounds like you are using a pressure plate without flat fingers. We use the Howe Hydraulic throw out bearing with a 1968 GTO stock pressure plate and clutch disc, The fingers on the pressure plate are flat, which allow the throw out bearing to work properly.


Fomocosho
Member
posted August 25, 2003 06:43 PM
The pressure plate i am using is the diaphram style and the fingers are flat.


Fomocosho
Member
posted August 25, 2003 07:06 PM
Im also using the flywheel off of a 68 chevy 250 inline six is it possible that this flywheel is thicker than other stock ones and if so could I just have a sixteenth turned off of it?


Fomocosho
Member
posted August 26, 2003 06:12 PM
How much can you safely mill a flywheel?


Fomocosho
Member
posted August 28, 2003 07:54 PM
Anybody?


Pickel
Member
posted August 28, 2003 09:15 PM
Call your local machine shop they should know.


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