The Martin/Ford engine that was in my Merlyn had a 7.25 inch clutch in
1966. To be sure, it was described in the invoice (which I also have,
believe it or not) as a Porche clutch of some type, but it is (I still have
the original clutch as well, the PO's for this car kept everything!) a bolt
in match for the Quartermaster clutch of essentially identical design now
on that engine. Bolt circle is the same, it has a "thick slotted ring"
(quote from the invoice) to space the pressure plate off the flywheel,
etc. The only significant difference is that it used an organic type disc,
so that I had to machine a .100" step in the flywheel to accommodate the
thin metallic disc that the Quartermaster clutch uses and I think it has a
pressure disc to actuate the spring fingers, while the Quartermaster has
the throw-out bearing act directly on the spring fingers.
Now, this was a single plate clutch, to be sure, but I found this all very
interesting...
Brian
At 02:07 AM 10/13/00 -0400, Greg Solow wrote:
>Gee, I always thought that a small diameter multiplate clutch only became
>available in the last 15 years or so . To my way of thinking that makes it
>fit the perfect description of a "non-vintage" modification akin to roller
>rocker arms or a belt drive conversion on a BMC "A' series engine. If I
>remember correctly, the SCCA rules thoughout the 60s and 70s required the
>use of a clutch of standard diameter and type of construction in all
>production cars.
> Regards,
>Greg Solow
>
>The Engine Room
>
>Santa Cruz, Ca.
>----- Original Message -----
>From: <JWoesvra@aol.com>
>To: <ericsmgs@prodigy.net>; <lwdent@fwi.com>; <mgvrmark@hotmail.com>
>Cc: <grand_wazoo@flinet.com>; <malcox@sonic.net>;
><vintage-race@autox.team.net>
>Sent: Friday, October 06, 2000 4:33 AM
>Subject: Re: clutch rebuilding
>
>
> > In a message dated 10/5/00 6:35:08 PM Pacific Daylight Time,
> > ericsmgs@prodigy.net writes:
> >
> > << Joint and Clutch in Charlotte, NC >>
> >
> >
> > I use Joint and Clutch in Columbia, SC. They built new half-shafts for my
>GT6
> > when I converted to Datsun outer hubs. Triumph flange on inboard end,
>Datsun
> > flange on the outer. Work great. They can make any drive-line component
>you
> > need. Of course they reline brakes and clutches too.
> >
> > However, I'm sure that every big city has a similar service. Many have
>been
> > in business for a long time and may still have real asbestos lining
>material
> > such as Grey Rock hidden in the back. They are not supposed to use it any
> > more, but there is nothing better for drum brakes if you can find it.
> >
> > A final thought for racers; it is really better to go to a Tilton style
> > clutch. This eliminates the deficiencies of the Borg & Beck type which is
> > prone to high rpm failure. They also work well in oily conditions.
> >
> > Jack Woehrle
> >
Brian Evans
Director, Strategic Accounts
UUNET, A WorldCom Company
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