[Spridgets] Master-slave cylinder

[Dean Hedin]

If you go to a larger bore slave you will get even less travel.

This is because you have increased the volume of the slave by boring it out.

I am running a 3/4 master with a stock bugeye slave with a 1275  pressure plate.
The clutch feel is slightly stiff but I am quite happy with it.

I don't think 1/2" - 3/4" travel is bad.  It only takes a slight amount of movement
to disengage the pressure plate from the clutch disk.  There is sufficient adjustment in the rest of
the system to accomodate the differences.

If you are having issues with clutch opperation then I think your problem is that you need to
take up more slack at the slave rod adjustment.

The question of a different slave bore size is really a determinant of the clutch stiffness at the pedal and not
so much about the stroke (within reason).   To get a softer feel at the pedal you would go to a larger
bore slave, and to get a stiffer feel you would go to a smaller bore.

I seem to recall that there is something in the Rivergate instructions regarding the slave rod length adjustment.
You should start with a small amount of free play (I think the instruction say about 1/4 inch).
You must have some amount a free play down at the slave.

In addition you should look at the sprite factory service manual regarding the adjustment nuts
in the pedal box to take up the pedal free play.

----- Original Message ----- 
From: "Joe Lansing" <kidjoevid at yahoo.com>
To: "Spridgets" <spridgets at autox.team.net>
Sent: Friday, January 01, 2010 12:56 PM
Subject: [Spridgets] Master-slave cylinder


> Can somebody answer my question about master-slave cylinders without laughing too loudly?
>
> I have a 62 with a 3/4 bore master cylinder. I put a Rivergate conversion in with a 3/4 bore slave cylinder. I'm only getting 
> about 1/2" to 3/4" of travel in the slave. Do I need to bore my master clutch cyl to 7/8"?
>
> On the brakes side, I seem to have things right - I converted to disks up front, and have them bled and operating - but I haven't 
> taken it out on the road. And the master is still 3/4".
>
> Any insights?
>
> Thanks,
>
> Joe
>
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