I took out the clutch last night and the friction disc is getting pretty thin.
There were also some hairline cracks on the disc itself. I guess the F3 clutch
disc is now on a two year maintenance schedule :-)
Thanks,
Alex
-----Original Message-----
From: Craig Henry [mailto:tiga_s2@yahoo.com]
Sent: September 28, 2004 6:33 AM
To: Jim and Rose Ann; Dick Rasmussen
Cc: Alex Chiu; autox-cm@Autox.Team.Net
Subject: Re: Clutch Replacement
Alex,
I agree with Jim, a stock clutch will last forever and
the difference moving the car around the pit/grid area
(something we do all the time) is noticeably easier.
They are simple, can take quite a bit of slipping
abuse, and are cheap. Slip the F3 clutch much and you
will be replacing it frequently. You will have to
decide what the higher moment of inertia is worth to
you. Not many CM competitors are willing to spend
money upgrading to aluminum differential, lightened CV
joints, drive axles, etc. if they don't have them
already and they don't need to be replaced.
Back to your original question:
Per Craig Taylor, the Tilton 7 1/4" clutch driven disk
is 0.104" thick new and can be run down 0.030" before
it is considered shot. The pressure plate is 0.534"
new and can go down to 0.520". No more than 0.007"
warping. How long it will last depends on how much it
is slipped by the driver. Some make it last three
seasons with two drivers. Others replace them every
year with one driver.
Good Luck,
Craig
--- Jim and Rose Ann <garryj@localnet.com> wrote:
> Dick Rasmussen wrote:
>
> > At 05:16 PM 9/20/20
> > Since it appears no one has responded regarding
> the clutch question: ....
>
>
> Sorry about that. I thought I replied a while ago
> but it must not have
> gone through. What I wrote was that I used the F3
> clutch in my prior FF
> and I was not happy with it. The thing is an on/off
> switch in
> paddock. On the course it didn't matter because I
> never used the
> clutch. Theoretically it is less weight for the
> engine to move but I
> doubt we'd feel it on an autocross course. With my
> current FF I use a
> stock clutch. Last year I had a throwout bearing
> problem. I got a
> good look at the clutch. I would guess this clutch
> had been in the car
> for at least 12 years (since Peter Raymond acquired
> it) and it looked
> well worn but not in need of replacement. I
> replaced it anyway but it
> was only because everything was easy to access at
> that point.
>
> Jim
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