I am on my second accumulator in my 2007 997.1TT. I have a Sachs clutch installed and an AWE tune (ECU and exhaust).

Before I replace the accumulator, I think I need to strongly consider doing the conversion to the GT2 slave.

I have searched several threads and tried to read up on it, but I have a few questions remaining.

1) What is the preferred source for the conversion kit? EVOMS? Others?
2) Which kit is the easiest install (for my mechanic)? I've read some may require dropping the trans....
3) What should I look out for and what should I be sure to alert my mechanic about?
4) Where to buy the kit?

I understand that many keep the assist spring to help reduce clutch pressure required. And, if one goes with the EVOMS, to make sure to get the braided line version.

Thanks!!

 

Many results can be had utilizing the forum search function. EVO and SpeedTech kits are both good using OEM parts. I do not have to drop the trans when I do the service. Make sure to remove ALL OF THE PENTOSIN from the system. If not - components will fail due to the composition properties of the pentosin.

 

Check your PM's please. Thanks!

 

1) I have the evoms kit.
2) There is a DIY for the conversion. I didn’t read through it in detail as I just had my mechanic do the conversion when my accumulator/slave were otherwise being replaced under warranty. With that said, I just did a clutch bleed last week and I have no idea how you would do this without some sort of transmission drop.
3) Make sure they FULLY bleed the system. Residual pentosin in the clutch master cylinder can prematurely wear out the seals. I was having an issue where the pedal would get ‘stuck’ about 2” from being fully up when releasing, and it had a sort of crunchy feel in to it at this position. I replaced the clutch master cylinder and shot some WD40 in the return spring and it has been OK since then. Make sure you have a nice smooth pedal all the way down AND all the way up, slowly and smoothly pushing/releasing it.
4) Bought from john@speedtech here who is awesome.

While I do not know what an actual GT2 clutch feels like, when you are done with this conversion I can confirm for you that your clutch will feel like a GT3RS

The kit comes with a new return spring... you definitely want to use it.

Also, I did not know Porsche was making a 991.1TT as early as 2007! :P

 

Awesome feedback. Thank you, sir!!!
D'oh! It seems to be incorrectly stated in your quoted part, but correct in my initial post (with edit notation).

 

I have a client with a 996 GT2. Clutch pedal is lighter feeling (less stiff) than a converted turbo. No by much IMO.

 

I have the EVOMs kit bought direct, and it is a great upgrade. Porsche fitted mine, but they did drop the box (so I had it done with my clutch). They also did not want to cut the lines from the power steering pump, but removed them completely, so that it could be restored if need be. This might be why they wanted to drop the box.


The pedal feel is a vast improvement, and the clutch biting position is always the same, unlike with the accumulator, where it feels different almost every time. This means no stalling on low throttle starts, and no over slipping on the big throttle starts.

 

Even though the original accumulator on my '08 Turbo never failed, a few months ago I did a preemptive strike and had the EVOMS GT2 clutch actuator kit installed along with a Sachs Performance clutch at my local independent shop. No issues whatsoever with the installation or the followup performance. The combination is great. Very predictable clutch pedal take up. Much stiffer at first but I've gotten used to it. Now it feels like I've always had it. The Sachs clutch has all the clamping force I need for the FVD Brombacher tune and exhaust that I did a couple of years back.

 

I was considering this conversion until I sat in a GT3 and felt the clutch and thought it was too stiff for an everyday drive and traffic!

Still toying with the idea though.

 

i did the oem conversion with 512$ worth of parts. dilled and clearanced the inside of the trans in 30 min. its an easy swap. the hardest part was actually getting the new master cylinder in place. tight quarters to work in.

 

This is actually perfect timing for this post as I want to get a bit of feedback as well, however slightly different.

I did the GT2 hydraulics conversion kit in my 997.1TT a few months back when I installed my ERP Triple Carbon clutch. Install went fine and the clutch feel was excellent as far as I was concerned. (we of course dropped the tranny as we were replacing the clutch, I also removed the power assist)

However about a month later I had a catastrophic clutch failure on a clutch that is designed to handle 1300+ WHP (I have about 650whp). After pulling it apart and sending the clutch off to ERP to be inspected and rebuilt, we found out that the clutch failure was due to the pin in the slave cylinder conversion being too long, which caused the clutch to always stay "partially engaged" creating massive amounts of heat which destroyed the clutch. This was confirmed by 2 other parties as well and it was said "oh, your supposed to shave the pin down some, they vary in length sometimes due to machine differences"

So my question is two fold, one has anyone else experienced a similar issue with the slave cylinder pin, and two, how do you know how "much" you are supposed to shave the pin to ensure it is functioning properly?


-Sayajin

 

"machine differences?" I hope that was a joke for the manufacture. What manufacture said that? I will be sure not to go near them.

 

so that's it? topic goes dead.

I have found EVOMS and AMS alpha kit....look very similar. Yet, I only find postings about the EVOMS kit. Anyone have any insight into AMS one?

Also...I like the idea of removing lines and possibly swapping out to GT2 power steering pump and reservoir as well. Has anyone done this?

 

I had the lines removed, but left the original pump. We sealed the holes on the pump.

 

I have the AMS kit paired with an ERP Triple. It seems to function quite well, no issues so far. Pedal is stiff as hell