different twist on clutch/pedal/master/ problems
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
different twist on clutch/pedal/master/ problems
While the engine was out I upgraded the clutch to a CenterForce DF.
No more clutch pedal sticking to the floor while approaching a turn at 120 mph.
I think it was Henry Kissinger that said every solutions only buys a ticket to the next set of problems...the bastard had to be talking about C5's
Now the M6 is hard as can be to get into gear at higher RPM's. Shifts fine driving around town, but run it up to redline and WTF.
I got an AutoTap reading today that showed I shifted at 7125 rpm's but by the time I got it into 3rd the rpm's had fallen to 5100.
Anyone run into this problem???
Another C5 was having similar issues at last weeks track event.
No more clutch pedal sticking to the floor while approaching a turn at 120 mph.
I think it was Henry Kissinger that said every solutions only buys a ticket to the next set of problems...the bastard had to be talking about C5's
Now the M6 is hard as can be to get into gear at higher RPM's. Shifts fine driving around town, but run it up to redline and WTF.
I got an AutoTap reading today that showed I shifted at 7125 rpm's but by the time I got it into 3rd the rpm's had fallen to 5100.
Anyone run into this problem???
Another C5 was having similar issues at last weeks track event.
Racer
Joined: Aug 2002
Posts: 475
Likes: 0
From: DFW TX
Re: different twist on clutch/pedal/master/ problems (Gary2KC5)
The clutch is not releasing properly. You need an adj. master cylinder asap. Why did you go with DF, I dont know anyone that has used one with good results?
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
Re: different twist on clutch/pedal/master/ problems (Gary2KC5)
Do you have an adjustable master? If not, I would try that. It sounds like it is not fully disengaging.
Team Owner
Joined: Mar 1999
Posts: 28,753
Likes: 9
From: San Jose/Bear Valley CA
CA Events Coordinator
Re: different twist on clutch/pedal/master/ problems (C5-VERT)
Do you have an adjustable master? If not, I would try that. It sounds like it is not fully disengaging.
vetterdstr :cheers:
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
Re: different twist on clutch/pedal/master/ problems (FRC21)
The clutch is not releasing properly. You need an adj. master cylinder asap. Why did you go with DF, I dont know anyone that has used one with good results?
what does an adjustable M/C do? Where is it located? and how hard is it to install?
[Modified by Gary2KC5, 9:10 PM 11/7/2002]
Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
Re: different twist on clutch/pedal/master/ problems (Gary2KC5)
The adjustable master allows you to adjust the release point of your clutch/pp by way of threading the pushrod that attaches to your clutch pedal. There are several versions of adjustable masters ranging from modified stock to complete units(Mcloed and AP). I would recommend the Mcloed or AP unit. AP is pretty expensive. I have the Mcloed and like it.
It is located under the brake booster towards the engine. You take the inner fender panel behind the front left tire out to reach it. About 1-2hrs depending on how mechanically inclined you are. I would bleed the clutch also but they are supposed to be pre-bled.
I would also find a replacement resovoir line b/c the stock line is a little short for the job and that can lead to problems. Below is a hydraulic line I used with modified fittings.
Here is a pic of the Mcloed
[Modified by C5-VERT, 11:18 PM 11/7/2002]
It is located under the brake booster towards the engine. You take the inner fender panel behind the front left tire out to reach it. About 1-2hrs depending on how mechanically inclined you are. I would bleed the clutch also but they are supposed to be pre-bled.
I would also find a replacement resovoir line b/c the stock line is a little short for the job and that can lead to problems. Below is a hydraulic line I used with modified fittings.
Here is a pic of the Mcloed
[Modified by C5-VERT, 11:18 PM 11/7/2002]
Thread Starter
Le Mans Master
Joined: Apr 2001
Posts: 5,331
Likes: 39
Re: different twist on clutch/pedal/master/ problems (MelloYellow)
Guys, thanks for the info...Mike great pics and follow up.
I take it that the adjustment is on the rod that attaches to the pedal?
MellowYellow, why do aftermarket clutches need the adjustable M/C?
Is it because they are so much stiffer?
[Modified by Gary2KC5, 10:45 PM 11/7/2002]
I take it that the adjustment is on the rod that attaches to the pedal?
MellowYellow, why do aftermarket clutches need the adjustable M/C?
Is it because they are so much stiffer?
[Modified by Gary2KC5, 10:45 PM 11/7/2002]
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Le Mans Master
Joined: Aug 2001
Posts: 6,071
Likes: 297
From: Savannah GA
Cruise-In IV Veteran
Re: different twist on clutch/pedal/master/ problems (Gary2KC5)
Guys, thanks for the info...Mike great pics and follow up.
I take it that the adjustment is on the rod that attaches to the pedal?
MellowYellow, why do aftermarket clutches need the adjustable M/C?
Is it because they are so much stiffer?
[Modified by Gary2KC5, 10:45 PM 11/7/2002]
I take it that the adjustment is on the rod that attaches to the pedal?
MellowYellow, why do aftermarket clutches need the adjustable M/C?
Is it because they are so much stiffer?
[Modified by Gary2KC5, 10:45 PM 11/7/2002]
Don't mean to answer Mellows question, but not all aftermarket clutches require adj. masters. The spec clutches do not require them and they can hold over 650rwhp/tq depending on type of disk, etc. Some clutches much be adjusted b/c the fulcrum or distance it takes from engagement to disengagement are different than stock. So for every inch you press the pedal, one clutch may have disengaged less than say, the stock clutch. This is why you want to adjust the master allowing disengament points to remain the same or close. Some clutches may also require different engagement points than stock. But being able to adjust, especially if you track the car, really lets you fine tune your setup. :cheers:
[Modified by C5-VERT, 2:05 AM 11/8/2002]
Le Mans Master
Joined: Apr 2000
Posts: 7,248
Likes: 0
Re: different twist on clutch/pedal/master/ problems (Gary2KC5)
Ya, the aftermarket pressure plates have more clamping force then stock. They require more effort to engage and also need more M/C action to get them off the disc and need more clearance or the disc will drag agains the PP and it will never fully disengage.
This is def the case for the CF DF.
This is def the case for the CF DF.
