francisluu

I've been driving my recently acquired 1990 C4 for the last two weeks and have been loving it. I'm likely due for a refresh and bleed of the clutch system but I noticed that the engagement point is closer to the floor than I was expecting. I've had a 993 for a few years and while the pedal feels is similar (stiff but smooth), the engagement point is towards the top of the pedal rather than the floor. I actually find the 964 easier to drive because of this though I'd love to understand what's typical all things being equal (master and slave are good, system is bled well, clutch is in good condition). Thanks all!

francisluu

I figure they'd be similar if not the same.

chsu74

My 993TT, brothers 993C2 and my new to me 964 C4 have similar clutch engagement points. Clutch wear may cause different engagement points though..

francisluu

My 993 before a new clutch had the engagement point higher than it currently is.

Do all of yours bite towards the top as well?

omg516

I recently replaced my clutch pedal roll pin and it noticeably changed the engagement point of my clutch. Before I changed it, the clutch would begin to engage very close to the floor. After the replacement I would say the engagement point is closer to the mid-point of the clutch pedal travel. You might want to check the condition of your roll pin, from my understanding it's a common point of failure in the 964, mine was pretty much broken in half.

Gus

Over the last 5 years I have gone through 5 clutch’s. Know this is not normal and I don’t ride the clutch. Some had less than 2-3000 miles on them.
The pedal release point has started high and gradually moved to the floor. In some cases, once warm, failing to completely release. When full depressed and in gear the car would creep forward.
First couple of times I’ll put down to normal wear failure. But last 3 have been strange. I have run different pressure plates looking for an answer. After engine mods went to a GT3 clutch only to have three rivets fail as the clutch release point moved to the floor. Latest issue has me really baffled as the pedal started high but moved to the floor, finally not fully releasing. Reason the pressure plate face has warped out of a smooth flat finished. The face was higher on the put side and lower on the inside. So much so the the disk was warn to match. The outside of the disk was very thin while the inside area was much thicker. Am taking pressure plate in to work and let the Porsche professional mechanics take a look and see what they say.
I now trying a 993 Turbo clutch system and have replaced the black slave hose with a stainless line. Also have replaced all between pedal and clutch. New master to slave as well as rod and throw. Will see what happens.
Right now my pedal is back at the very top, and this feels very strange as it is so high.
Any way will up date as/if clutch pedal position changes.

Marine Blue

Mine engages midpoint, clutch was replaced about 8k miles ago. I’ve driven a 993 that had a high clutch engagement, it was on its original clutch with 48k miles. I also drove a 30k mile 964 and it also had a midpoint clutch engagement.

Having driven several other Porsches, most have a midpoint engagement.

RallyeChris

My 91 C2 has a RS flywheel and GT3 clutch. Replaced about 15k ago. Bite-point is middle-to-top. That had changed to close to the floor for a time, diagnosed as failing roll pin. Pulled pedal assembly and replaced roll pin. Back to the middle-to-top again.

chsu74

All mine bite around 6/10 to 7/10 up. Just after midpoint.

francisluu

Thanks for all of the anecdotal data — time to investigate