TypeRx

My car has a GT2 slave conversion (with Sachs "2.5" clutch) and does not require 100% fully depressing/releasing the clutch in order for engagement/disengagement. So, I began thinking if a clutch stop might even further improve the driving experience.

I see RSS has an option but is anyone here using it (or another stop)? Would be great to hear from someone running a clutch stop in a 997TT.

theplings

Would you have issues starting the car if you couldn't fully press the clutch pedal?

elite1

I only considered this with the ERP 3X setup. With a short window of friction engagement, you almost need it.

Otherwise, you have the wrong clutch.

My 4.0 clutch was very easy to drive with great hold.

TypeRx

No, you just need to be able to push the clutch far enough to actuate the switch. I am only taking about eliminating the last 0.5-1" of pedal travel.

Mike Billings

I've had one for a few months on a stock clutch. Like it. Easier to guess the bite point.

TypeRx

Are you using the RSS stop or something else?

Mike Billings

Homemade clutch stop. 10 mins to design and install.

Still hoping the GT2 parts will be the final solution.

TypeRx

That's great - amazing how simple these can be. Any pics of yours?

Mike Billings

Reluctant to share this - but here goes:

The lever for the clutch pedal has a C shape cross section. So the back of the arm is hollow or concave.

Take one of those LED flashlights they hand out at Harbor Freight sometimes for free. Hold it up to the back of the clutch lever. You can feel that it fits in the groove quite securely. Two Zip-ties. Done.

It's been on there for a few months and I feel the clutch bite point is easier to judge.

TypeRx

Thanks much for sharing. While some purists may be cringing, I love to see the DIY innovation.

Mike Billings

OK now the whole world knows:





To your original post, I would recommend trying a (purchased) clutch stop. It increases your confidence in clutch release that you can enjoy that light turning green without worry of stall or smokey clutch.

911mhawk

I put an RSS in my 6t that runs a Clutch Masters pp where the engagement is high.
There's no need to press the clutch in very far and I like the stop.

pfbz

It's a Porsche for god's sake... Shouldn't you at least be zip-tying a high end tactical flashlight to the clutch lever?



(Seriously though, whatever works! Form follows function...)

TypeRx

Thanks Mike Billings and others for chiming in. I ended up doing a version of the "Billings Mod" yesterday. I took a piece of spare PVC I had, painted it flat black, and then wire tied it to the back of my clutch pedal. The PVC is about 1.25" diameter.

While I had to mess with the position of it a little to ensure the clutch switch could still engage (to start the car...I don't want to bypass this) -- OMG, it makes a massive difference in driveability in my application. As I mentioned, I have a GT2 slave conversion with Sachs "2.5" clutch setup and now the travel to engage/disengage the clutch is considerably shorter and makes it much easier to modulate and sync speed with the shifter during shifting. In addition, the shorter clutch pedal travel now pretty much negates the increased effort needed because of the GT2 slave. It really is a win-win.

Long live the "Billings Mod"! I consider this an absolute must try (if not must have) if you have a similar setup to mine.

TypeRx

There were 2 concerns I had about the RSS stop...

1. The price - while not exorbitantly expensive, $125+ seems like a bit much for this "mod"
2. The potential for carpet wear - I thought that the part that contacts the carpeted firewall may not distribute its force over a large enough area, causing the carpet to rip. Is that true?