C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

clutch problems

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Old Mar 24, 2010 | 12:21 PM
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I may be a little crazy, ill admit. i have a mildly built 327 and the 4+3 transmission in an 87 mazda b2600. i have mated the clutch master cylinder (stock mazda) to my new slave cylinder (stock vette) with the proper line. the clutch system isnt pushing the fork very far, approximately 1/4 inch.

i dont have the fork pushrod that is supposed to be in it, i just made on from a master pushrod i had, but i dont know what the length is supposed to be. does anyone know what this rod's length is supposed to be?

also, i dont know the exact measurements of the vette master or the mazda master but they appear to be the same size. does anyone know the dimensions of the vette master cylinder?
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Old Mar 24, 2010 | 01:44 PM
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Originally Posted by cviola2005
I may be a little crazy, ill admit. i have a mildly built 327 and the 4+3 transmission in an 87 mazda b2600. i have mated the clutch master cylinder (stock mazda) to my new slave cylinder (stock vette) with the proper line. the clutch system isnt pushing the fork very far, approximately 1/4 inch.

i dont have the fork pushrod that is supposed to be in it, i just made on from a master pushrod i had, but i dont know what the length is supposed to be. does anyone know what this rod's length is supposed to be?

also, i dont know the exact measurements of the vette master or the mazda master but they appear to be the same size. does anyone know the dimensions of the vette master cylinder?
I would bet the master is too small, I think you need at least a 11/16 ID master
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Old Mar 24, 2010 | 02:48 PM
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thank you. i know the vette slave is something like 1 1/16", but no ides on the mazda master. ill take it off and measure it. if its too small, ill get a vette master and modify it to fit. do you know how lond the fork pushrod is?
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Old Mar 24, 2010 | 03:16 PM
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I had a print but cant find it, the length is @ 3-1/2 long if I recall correctly

Last edited by LD85; Mar 24, 2010 at 03:18 PM.
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Old Mar 25, 2010 | 02:02 AM
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thanks again
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Old Mar 25, 2010 | 08:27 AM
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Originally Posted by cviola2005
i dont have the fork pushrod that is supposed to be in it, i just made on from a master pushrod i had, but i dont know what the length is supposed to be. does anyone know what this rod's length is supposed to be?


The Vette master self adjusts at the end of the return stroke, does the Mazda master do the same ?

I think getting the matching Vette master, would be time well spent.
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Old Mar 25, 2010 | 09:40 AM
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I am not sure if he means the Master Slave rod that connects to the upper clutch pedal or the Slave Push rod
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Old Mar 25, 2010 | 01:38 PM
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im talking about the slave pushrod. the one in the pic looks identical to the one i saw on ecklers. thanks for the pic, it give me lots of info to go by.

im gonna go work on it, and ill post my findings on here. thanks a lot guys
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Old Mar 25, 2010 | 01:57 PM
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in just a few minutes i had the makeshift slave pushrod out. i measured it and to my surprise it is identical in length. so i can only naturally assume that this is not my problem.
now im gonna take out my master cylinder and measure the bore and stroke.
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Old Mar 25, 2010 | 08:29 PM
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UPDATE:
the bore of my master cylinder is 11/16". with a stroke of about 1 3/4". is that in the ballpark of the vette master?
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Old Mar 25, 2010 | 09:13 PM
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Originally Posted by cviola2005
UPDATE:
the bore of my master cylinder is 11/16". with a stroke of about 1 3/4". is that in the ballpark of the vette master?

11/16 = YES, 1-3/4 = no

Go down to Autozone, ask for a 84-88 master salve and measure it.
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Old Mar 25, 2010 | 09:53 PM
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im a few miles from an auto parts store. do you know the measurement?
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Old Mar 28, 2010 | 11:42 PM
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