996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Thoughts on SPEC clutches?

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Old Jan 7, 2013 | 05:48 PM
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Thoughts on SPEC clutches?

So I did some research and it seems that the reviews for SPEC clutches for 996 Turbos are not so good. From what I read it seemed to be due to the fact that the only Spec clutch available for the 996 Turbo were unsprung.

Anyway I have since learned that SPEC offers a sprung clutch for the 996 Turbo. Is anyone running this? If so what are your thoughts on it?

I had good experience with Spec clutches back when I had a modified Camaro.

Thanks,
J
 
Old Jan 7, 2013 | 06:14 PM
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Originally Posted by NTIMD8
So I did some research and it seems that the reviews for SPEC clutches for 996 Turbos are not so good. From what I read it seemed to be due to the fact that the only Spec clutch available for the 996 Turbo were unsprung.

Anyway I have since learned that SPEC offers a sprung clutch for the 996 Turbo. Is anyone running this? If so what are your thoughts on it?

I had good experience with Spec clutches back when I had a modified Camaro.

Thanks,
J
HI, Sorry to say but I would have to agree with you research...
 
Old Jan 7, 2013 | 06:29 PM
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But from what I read the issue was the fact that it was unsprung. Does the fact that they now offer a sprung clutch change things?
 
Old Jan 7, 2013 | 07:49 PM
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why don't you go with what people liked and gave good reviews? A brand for a product may be popular for a certain type of car but bad for an other. I would stick with what people like, never read anything about the Spec clutches in the Porsche crowd.

Are they much cheaper, why are looking to go this way?
 
Old Jan 7, 2013 | 08:59 PM
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Originally Posted by pumalex
why don't you go with what people liked and gave good reviews? A brand for a product may be popular for a certain type of car but bad for an other. I would stick with what people like, never read anything about the Spec clutches in the Porsche crowd.

Are they much cheaper, why are looking to go this way?
Only because SPEC was one of the few that worked well for me in the past after trying a few different brands. I started to research them and like I said came up with the fact that people in the Porsche world didn't seem to like them but looks like it was due to the unsprung issue. Now my curiosity has me asking if through the years and the availability of a sprung clutch has changed things for the better.
 
Old Jan 7, 2013 | 09:39 PM
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The GT2 factory clutch is unsprung. I'm still not sure I'm used it it after 1500 miles. Allegedly, the sprung part really only matters if you're doing a LWFW, but also if you do a lot of street driving it could be friendlier.

What I can describe as the difference (however, I never drove a factor sprung clutch w/ GT2 hydraulics) is that while the engagement point movement is the same distance +/- 1/2" or whatever on the clutch pedal itself -- it has a harsher engagement feel. Seems more likely to 'thud' engage with the unsprung disk.

Your results may vary. I like the more direct feel.

Henry
 
Old Jan 7, 2013 | 09:51 PM
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I had a few different set-ups now..
On this last clutch job I went to a Sachs Performence GT2 disc, where as before I ran sprung CM and sprung factory.I have the original Dual Mass, 40,000+ miles on it.
I could not tell a difference in driving between a sprung and unsprung..But just maybe a tid bit better response since it is a few pounds lighter?
Most of the time the pressure plate dictates the height of the pedal..
 
Old Jan 8, 2013 | 01:08 AM
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I have a spec clutch with my 852nm or 640ft/lbs takes a while to get used to the uptake but once ur used to it its great very positive with no slip. Uptake is right at the top of the pedal travel but as I said just takes a while to get used to it.

and they cheap compared to the rest
 
Old Jan 8, 2013 | 05:32 AM
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Originally Posted by johnspeed
Most of the time the pressure plate dictates the height of the pedal..
Hrm... that makes more sense. Maybe it's all in my head
 
Old Jan 8, 2013 | 06:00 AM
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I had the SPEC 3+ set up in my car for a short period of time. As mentioned is was unsprung. It made the car VERY hard to drive. It was on/off switch and almost impossible to modulate. Much harder than a Carrera GT to drive for those who have driven the Carrera GT. I swapped to a 2+ with a sprung hub and have put 20,000 miles on with out issue. I'm also using the SPEC LWFW and again no issues. It rattles like most LWFW at a stop light. It is a decent product for the $.

Looking back I wish I would have spent the $$$$ in the Sachs or Clutchmaster set-up. Live and learn.

To Pumalex. The SPEC was less then half of the others I mentioned when I bought mine.
 

Last edited by Gunther; Jan 8, 2013 at 06:03 AM.
Old Jan 8, 2013 | 06:11 AM
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Originally Posted by timccloud
I have a spec clutch with my 852nm or 640ft/lbs takes a while to get used to the uptake but once ur used to it its great very positive with no slip. Uptake is right at the top of the pedal travel but as I said just takes a while to get used to it.

and they cheap compared to the rest
HI,Take the clutch pedal booster spring out and you will see that it will be a better feel,easier to modulate..
There are past threads on this topic...
 
Old Jan 8, 2013 | 06:41 AM
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Wink

Originally Posted by johnspeed
HI,Take the clutch pedal booster spring out and you will see that it will be a better feel,easier to modulate..
There are past threads on this topic...
ok cheers I will try this
 
Old Jan 8, 2013 | 04:55 PM
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I've got an unsprung Spec 2+ that I plan on using with the stock flywheel. I'll post my results in about 2 months when I put the car back together. I'm doing the GT2 slave conversion so that should help the engagement point.
 
Old Jan 8, 2013 | 05:30 PM
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I bought my car used about a year ago. the previous owner had installed a LWFW and SPEC stage 2+ clutch. drove the car one weekend after paying to have all that done and put the car for sale. I bought it. I do all my own wrenching. big deal it needed some clutch work. On my test drive i stalled the car about 20 times. two weeks after owning the car i pulled the cluth called spec asked for options. the thing grabbed far to much for me. they convinced me to send it to them. 700$ later I got it back with a sprung disc that was suppored to be a little less agressive ala stage 2
i put this new setup in the car last spring and I have hated it ever since. Now winter is here I bought a GT-3 sprung disc. Im installing that with the spec pressure plate and LWFW. I pulled the engine and tranny over christmas break. Im doing the clutch swap new synchros on 2nd gear. gt-2 master slave conversion, IPD plenum, 74 mm throttle body, Tial Alpha 28 turbos, custom turbo intake pipes, coolant line welding, larger injectors, water injection, and a new EPL tune.
The point is, I have had several HD clutches in several other cars before. the spec clutches just are too agresive for a street car. a Porsche should not be like that on engagement. and look what swapping it twice in one year cost me...
 
Old Jan 8, 2013 | 07:17 PM
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That's interesting. I ran spec in other cars and it felt almost stock in terms of engagement.

Originally Posted by forcefed1
I bought my car used about a year ago. the previous owner had installed a LWFW and SPEC stage 2+ clutch. drove the car one weekend after paying to have all that done and put the car for sale. I bought it. I do all my own wrenching. big deal it needed some clutch work. On my test drive i stalled the car about 20 times. two weeks after owning the car i pulled the cluth called spec asked for options. the thing grabbed far to much for me. they convinced me to send it to them. 700$ later I got it back with a sprung disc that was suppored to be a little less agressive ala stage 2
i put this new setup in the car last spring and I have hated it ever since. Now winter is here I bought a GT-3 sprung disc. Im installing that with the spec pressure plate and LWFW. I pulled the engine and tranny over christmas break. Im doing the clutch swap new synchros on 2nd gear. gt-2 master slave conversion, IPD plenum, 74 mm throttle body, Tial Alpha 28 turbos, custom turbo intake pipes, coolant line welding, larger injectors, water injection, and a new EPL tune.
The point is, I have had several HD clutches in several other cars before. the spec clutches just are too agresive for a street car. a Porsche should not be like that on engagement. and look what swapping it twice in one year cost me...
 


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