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Re: Clutch
If you didn't replace the pressure plate when you replaced the disk, then
you may have a bad pressure plate. However, it is more likely the nature of
the clutch disk that is causing the issue you are describing. As you
stated, in a self-adjusting hydraulic clutch, the point of engagement
changes as the clutch wears. The AP clutch disk (again, I am assuming it is
like mine) is about as thin as a very worn stock clutch disk. Therefore,
the hydraulic actuation self-adjust to compensate for the thin disk. The
pedal feels as if it is at or near the end of its adjustment because it is.
The difference is that the material on the AP clutch should experience very
little wear over time, & therefore, there will not be much need for
additional adjustment for clutch wear.
I experienced the same phenomenon when I installed my racing clutch. The
clutch in my race car is a cable actuated clutch rather than a hydraulic
one, & the cable must be manually adjusted. After installing the racing
clutch, I had to adjust my clutch cable almost to the end of its adjustment.
There is almost no adjustment left in the cable. I have raced with this
clutch in the car for almost a year (including a 6 hour enduro), & I have
not had to adjust the cable at all.
Michael Keith
Pasadena, TX
'98 Jetta GLX
'85 Golf SCCA ITB
-----Original Message-----
From: Jeremy Selg <jisu09@hotmail.com>
To: jettaglx@igtc.com <jettaglx@igtc.com>
Date: Thursday, February 11, 1999 4:34 PM
Subject: RE: Clutch
>>Date: Thu, 11 Feb 1999 15:26:38 -0600
>>From: mikeandcarmen <mikeandcarmen@pdq.net>
>>To: jettaglx@igtc.com
>>Subject: RE: Clutch
>>Reply-To: jettaglx@igtc.com
>>
>
>I understand that the engagement is abrupt and the other
>"sacrifices"related to a racing clutch, I'm definitly willing to make
>the "sacrifices", but what my real question is.... It seems that with
>a self adjusting hydralic clutch, with wear & tear it will adjust
>itself. Therefor the point of friction or engagement when depressing
>the clutch pedel will move increasingly toward the top of the pedel.
>If the point of friction is ALREADY very near the top of my pedel,
>when my clutch self adjusts it will have no room to "go up" This may
>not be an actual clutch disk problem, as much as a pressure plate
>problem. My main concern is clutch life.
>
>
>
> JR
>
>>I'm not familiar with the AP racing clutch, but if it's anything like
>the
>>racing clutch that I bought from BSI for my race car, then the
>engagement &
>>disengagement characteristics that you described should be considered
>normal.
>>
>>The disk of my racing clutch is a 4 puck design with ceramic friction
>>material. This clutch disk has much less friction material than the
>stock
>>clutch disk. This is the reason that it disengages so quickly.
>Also, in
>>addition to having a very thin layer of friction material, this
>clutch disk
>>has no springs in it like the stock disk does. This is why
>engagement is so
>>abrupt.
>>
>>These are the inherent trade-offs of a racing clutch. Those of us
>who use
>>them in racing applications are willing to sacrifice smooth
>engagement for
>>quick, slip-free engagement. The whole point of a racing clutch is
>to not be
>>able to slip it.
>>
>>If you find the characteristics of this clutch to be unacceptable, I
>would
>>suggest that you use a stock clutch disk or perhaps a disk that is of
>stock
>>design with better quality friction material if such a disk exists.
>>
>>In any case, this is assuming that the AP racing clutch is of the
>same design
>>as my racing clutch. If that is not the case, then my statements may
>not be
>>applicable.
>>
>>Michael Keith
>>Pasadena, TX
>>'98 Jetta GLX
>>'85 Golf SCCA ITB
>>>===== Original Message From Jeremy Selg =====
>>>I installed an AP racing clutch about a month ago. When I first put
>it
>>>in it was really grabby, on or off, you couldn't slip it if you
>tried.
>>>Now after only a month the friction point is really high on my
>pedel, I
>>>press it in about 1" and the clutch disengages. This is reminisent
>of
>>>when my stock clutch went out. I know there is no way to adjust the
>>>point of friction (where the clutch engages,in relation to pedel
>>>depress). My question is has any one had experience with a
>performance
>>>clutch that didn't "act" right? What was wrong? What did you do?
>>>
>>> JR
>>>
>>>
>>>
>>>
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