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Car Forum / MINI / August 2005

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Question on Clutch

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OsiTech.Net - 26 Aug 2005 18:27 GMT
It's time for new clutch on the Moke. I am using an MG Metro powertrain but
with pre verto clutch stuff.

While I am in there is there any performance parts/upgrades I can use here
to gain more insane performance? I always like to use the opportunity when
changing parts to get an edge.

Thanks.

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miniman - 26 Aug 2005 23:56 GMT
> It's time for new clutch on the Moke. I am using an MG Metro powertrain
> but with pre verto clutch stuff.
[quoted text clipped - 4 lines]
>
> Thanks.

Hello!

You can get a lightened flywheel and back plate assembly, that would
help the engine to accelerate better in lower gears!

You can use a turbo clutch plate if you are expecting lots of torque
from the engine, I got one in mine at moment and with 10psi of
supercharged boost it seems to be ok with a new diaphragm, although it
does judder a little on take up.

The diaphragms are available in higher pressures, I think the next one
up for road use is an orange one which gives a slightly heavier clutch
pedal or they do heavier springs which really are too heavy for
traffic, best suited for race machines where no real clutch slipping is
required for parking etc!

The clutch plates are available in different grades also with some
capable of just 76lb/ft of torque and some capable of over 119lb/ft,
rally and race ones are available as well but are really an all on or
off affair so are no good for traffic.

The real question with plates and diaphrams is, does your clutch slip
at the moment under power? (before it was worn!) if not then maybe just
leave as is,  I would go down the lightened flywheel route though!

Miniman
OsiTech.Net - 27 Aug 2005 00:32 GMT
Thanks for your response.

The whole clutch assembly was a transfer from my old 850 powerplant. It did
not slip in the 850 but at 33 hp. The very moment I installed it in the 1300
it slipped but now gotten progressively worse. Yesterday afternoon I had a
hard time going up the Cajon Pass here in Southern California in 4th gear. I
think it was an 6% longish grade.

I was told that the pressure on the 850 is less than the 1300 and use
different plates.

I tried to get a lightened flywheel today but my local stockiest
http://www.heritagegarage.com was out of them. I however went with some
higher rated clutch package.

Thanks for your time and have a nice weekend. It's 105 degrees here now.

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Searching for a Class A Coach in SoCal
http://AustinMini.OsiTech.Net

>> It's time for new clutch on the Moke. I am using an MG Metro powertrain
>> but with pre verto clutch stuff.
[quoted text clipped - 31 lines]
>
> Miniman
Chris - 28 Aug 2005 01:29 GMT
> Thanks for your response.
>
[quoted text clipped - 12 lines]
>
> Thanks for your time and have a nice weekend. It's 105 degrees here now.

Bear in mond that lightened standard flywheels have a tendancy to go bang
when used for long periods at high rpm, and the flywheel sits roughly just
between your legs.  The steel flywheels are better but also mean that they
have to be removed every 3000 or so miles and re-lapped back onto the
crank - otherwise it will frett and eventually weld itself to the crank.
Not a prob if you have a steel crank but you should keep it mind on a road
car you do lots of miles in.  AP do an uprated clutch plate.  V similar to
std but doesnt have the 4 springs in the middle so as other poster says, it
is a bit sharp on take up.

hth
chris
Rob - 29 Aug 2005 12:43 GMT
> Thanks for your response.
>
[quoted text clipped - 6 lines]
> I was told that the pressure on the 850 is less than the 1300 and use
> different plates.

There are 4 standard pressure plates  red spot -850  light green - 998
 black/ white 997/998 Cooper  and green/blue cooper S

> I tried to get a lightened flywheel today but my local stockiest
> http://www.heritagegarage.com was out of them. I however went with some
> higher rated clutch package.
>
> Thanks for your time and have a nice weekend. It's 105 degrees here now.

Just as a note on the installation of the clutch assembly irrespective
of car type.

If you do not line up the balance marks  - cover, FWheel and PPlate it
will also slip.

rm

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