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Old 11-07-2007, 09:01 AM
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Hydraulic Slave cylinder

I have a small block chevy motor in my 53 Chev sedan. The tranny is a muncie 4 speed with clutch operation via a hydraulic master cylinder from Wilwood. The slave cylinder is from a 84 Nissan Truck. I can't get full release without ruining the throwout bearing against the pressure plate. A firm in Calif manufactures a hydraulic pedal and provides this master cylinder, but is unable to give any advice on proper slave cylinder. Has anybody found a good slave cylinder (pusher) for this conversion?
The master cylinder is a 3/4" bore as is the slave cylinder. The slave has a maximum stroke of 1 1/4" which may not be quite enough for the stock throwout arm. In a manual clutch setup can anyone tell me the arm travel required for full clutch release with proper clutch adjustment?
I know hydraulic throwout bearings are available from Jeg's and Summit, but here again I am unable to find if these work for my application. Is there any adjustment in a hydraulic throwout bearing?

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Old 11-07-2007, 02:18 PM
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I had a customer come in with the same problem. I found a release fork that was a half inch shorter and it now works just fine. The shorter fork reduces the amount of travel needed by the slave. If you can't find a shorter one, you can shorten the one you have.
Bob
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Old 11-07-2007, 02:41 PM
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Bob
Thats something I had overlooked-----thanks
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Old 11-07-2007, 03:42 PM
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Why don't you use a slave cylinder for a Chevrolet? Then it would have the right stroke. I remember a lot of the late 70 early 80 pick-ups used hydraulic clutches .
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Old 11-07-2007, 08:22 PM
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I have an 87 Chev truck bellhousing and slave cyl operated with an 88 Master in the 59.

The bore in these cylinders are either 5/8 or 11/16---cannot remember for sure.

A smaller bore slave would probably work for you if it had enough stroke.

Might want to stop by a NAPA or Car Quest and ask to check the attributes of the cylinders in their book.

Bryan
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Old 11-08-2007, 09:56 AM
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The problem with using Chevy slave cylinders is that I am using a 55-57 bellhousing and most Chevy cylinders don't mount onto my housing. Also I was told that the Camaro cylinders were pull. Your suggestion is good as I have a wrecking yard near that has quite a few trucks, so I will go crawling and see what I find.
Thanks
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Old 11-08-2007, 10:18 AM
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You have a 1 1/4" stroke cyl. That's the same as a chevy. Get a release fork for a hyd. clutch (they are shorter) or shorten the one you have. It will work perfect.
Bob
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Old 11-08-2007, 06:54 PM
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Thanks Bob, I will check for a new fork
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