stock clutch starts slipping with a flash and exhaust from my experience.
I never abuse it, launch it hard, but in the higher gears I noticed it slipping so upgraded.

 

Excellent thread
997tt clutch is a nightmare to engage it into the first gear
And it's much easier and variable in the gt2
Good move yarrlis

 

I recently traded my TT for an 08 GT2 and the clutch feel is amazing. I feel like I can feel all the friction of the clutch making contact with the pressure plate. It feels like an old school clutch and just makes me feel more a part of the car. The TT clutch made me feel detached from the car, almost like I was driving an automatic.

 

Think the biggest concern for most people (and by most, I mean me) is the the required pedal effort without the hydraulic assist. I'm not a small guy by any means, but I also don't want to blow out my knee driving to the store How much more 'difficult' would you say it is to work the clutch on the GT2 vs. the TT?

 

I have just a tune and slip in 4th 5th and 6th when WOT punched.
So yes I would think despite what you've been told if you tune you will need to upgrade eventually.

 

The pedal effort is substantially increased. The first time you drive the car, you will be shocked - it will feel really hard to depress. This feeling will fade with some seat time and after a month or so, it will just feel normal. I am so used to mine now, that it doesn't even feel hard any more. That said, if you have a long commute in stop and go traffic, I think it would get tiresome. I don't have that type of driving in my day, so it's all good for me.

I concur with il nino above...you really can feel every bit of the friction and modulate it perfectly. It's just so much better than the power assisted version, unless you have the constant heavy traffic issue.

 

Thanks for the input, John. I guess what I'm really concerned with is not so much depressing or disengaging the clutch but more so the ease (or difficulty) of smoothly engaging the clutch. Is the spring force of the pedal on the return (i.e. engagement) harder as well?

 

What Parts are needed for the conversion in a 997 Turbo?

 

From EVOMS website:

Includes:
-EVOMS CNC Machined Billet Aluminum Slave Cylinder Mount
-CNC Machined Hydraulic Block Off Plugs
-Clutch Slave Hydraulic Line
-Clutch Assist Spring Assembly
-OEM Clutch Master and Slave Cylinders
-All Hardware and Detailed Installation Instructions

 

^^and that's only half the cost. Installation is PRICEY!

 

John@speedtech hit the description of the feel right on. Its different at first but you get use to it. It compliments any power upgrade done on the TT. PLus you wont have to worry bout the annoying clutch slave cylinder problem!

agreed with bonehead on the installation if you cant do it yourself its very pricey! best time is to swap it out is during clutch replacement regardless if the slave cylinder has gone bad or not.

 

The force on return is increased, but it does not seem to be as dramatic as the increase in force to depress it initially. I find it very easy and natural to modulate the clutch as it's coming back out and it felt predictable/easy to manage from the very first time I used it, after the conversion. Unless you have a knee problem, I don't think you would have any problem with it. All the older 911's were like this - it's just that the recent 911's have been softened for mass appeal. People used this non-assisted style clutch on 911's for years.

BTW - If anyone is interested in one of these kits, PM me and I will be glad to give you a price. We have sold quite a few of these.

I converted mine mine years ago, before the kits were available and we used the euro 993 GT2 clutch parts (the 993 GT2 that was never allowed in the US). The slave bolted on the opposite side of the transmission case and utilized a mirror reverse fork to work from the opposite side. The bosses were there to tap for mounting the 993 slave, so we tapped the case, installed the 993 fork and had a new line made with the proper fittings...below are a couple of picture of the job in process. Picture 1 shows the power assisted slave vs. the simple, non assist slave and picture 2 shows the mirror reverse fork that sits inside the case. This conversion shed a bit of weight, too.

 

I agree with John about the difference in feel on depressing and letting up on the clutch. The first time I drove it I felt like it was 1967 and I was driving a big block muscle car but all the subtle feeling makes it well worth the little extra effort. Now, I feel like this is how a clutch is suppose to feel and the hydraulic system just seems to make it too isolated.
The rest of the car is the same as the clutch too. The steering is much sharper, the happy rear end is a pleasure to play with etc. This is the car that I was trying to make my TT into.
I had an 89 930 and loved it and then a 993 TT and a 997 TT and really missed the rear wheel drive of the 930. Now with all the electronic aids, the rear wheel drive is not as dangerous as my 930 was. I haven't tracked it yet but I will have to take it to some Porsche club events in the spring.

 

Good feedback. Thanks. Alright. That settles it. I'm gonna do it....after I can suck it up and finally buy a 750 kit