996 Turbo / GT2Turbo discussion on previous model 2000-2004 Porsche 911 Twin Turbo and 911 GT2. Sponsored By Vivid Racing
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My clutch is slipping. The dealer says it is time for a new clutch. My TT is a 2002 with 21000miles. My car has the intake/DME/Exhuast upgrade done by Techart. The dealer says the extra HP (and especially) extra Torque. Plus the fact that the car is tracked has caused the clutch damage. He is happy to fix it for $4200!!!!!
What do you guys think?
Is this a fair price?
I asked for an upgrade clutch and they said no. Is there one?
Is there anything else they can do while they have the engine out and the clutch out?
Thanks
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yes there is its the SAchs light weight clutch with flywheel. get it. i have it. FVD, Imagine auto , Evolution motorsports- all have them. it under $2K plus install. go to a porsche shop and they will charge u half price- porsche service is something like $160 an hour.
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01 996TT - 9.91 sec.145.64 mph 1/4 mile (4.62 sec. 60 to 130mph) 06 CLS AMG
I will check with some independent shops tomorrow. I just don't know about using an independent for a job like this. Are there any drawbacks to the Sachs?
Originally posted by 1999Porsche911 Your HP has nothing to do with it. Either you have been driving the clutch improperly or it was a bad clutch to begin with.
?
Clutches (especially the stock one) are rated for a specific max hp/tq. From what I understand, the stock clutch is pushing its limits with 500hp/550tq.
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2001 Porsche 996 Turbo (sold - 3/04/07)
1999 Land Rover Discovery II
Originally posted by MARKSKI yes there is its the SAchs light weight clutch with flywheel. get it. i have it. FVD, Imagine auto , Evolution motorsports- all have them. it under $2K plus install. go to a porsche shop and they will charge u half price- porsche service is something like $160 an hour.
Service is $98/hr here in Atlanta and I thought that was steep.
here in Chicago is 150 plus. but if u go to a race shop( someone online here can direct you where to go in Atlanta) and get a flat rate. Porsche service does it by BOOK HOURS- so the tech will do it in 4 hours but the book tells 8 hours... well u just paid twice as much. thats just an example.
no draw backs except that it make a funny almost scary noise at idle- it the throw out barring( due to the nature of the clutch its just that way).
Its street drivableand I love it( I have stage 4 mods). i blew my first one as well.
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01 996TT - 9.91 sec.145.64 mph 1/4 mile (4.62 sec. 60 to 130mph) 06 CLS AMG
Clutches (especially the stock one) are rated for a specific max hp/tq. From what I understand, the stock clutch is pushing its limits with 500hp/550tq.
You are reading too many articles from people who sell after-market clutch systems. Fact is, the stock pressure plate is more than enough to hold the clutch against the pressure plate without any slippage for hp far beyond 500. It all boils down to the proper engagement of the clutch. If you are slipping it incorrectly, it doesn't matter how little or how much HP you have, you're going to fry it. Once the clutch is engaged, your weakest link on the Porsche is the wheels. If something is going to slip because of power, it will bethe wheels. That assumes you are not running extra wide slicks, which none of us are.
The clutch is either engaged or not engaged. It is the time in between that causes it to fail. If you need a new clutch at 20,000 miles, then it probably is driving habits.
Originally posted by hhazrati I will check with some independent shops tomorrow. I just don't know about using an independent for a job like this. Are there any drawbacks to the Sachs?
Marski's right. The book rate is typically close to 2X the actual time it will take to do the job.
I agree with the guys who say your clutch was defective or your driving habits need to be adjusted since 21k even for a DME modified TT is too soon, and track driving shouldn't be any worse on it than city driving in traffic.
Lastly, I don't know about "funny almost scary" noise. The stronger clutch/lightweight flywheel will make a rattling like sound at idle when the clutch is disengaged. That said, the CGT makes this noise stock so what's the big deal? If you want performance, you will most definetely get it with that lightweight flywheel (which is making the noise - not the clutch). Porsche uses heavy dual mass flywheels stock which while muffling the noise so you don't hear it will cause the car to rev much slower.
Originally posted by ben, lj Marski's right. The book rate is typically close to 2X the actual time it will take to do the job.
Lastly, I don't know about "funny almost scary" noise. The stronger clutch/lightweight flywheel will make a rattling like sound at idle when the clutch is disengaged. That said, the CGT makes this noise stock so what's the big deal? If you want performance, you will most definetely get it with that lightweight flywheel (which is making the noise - not the clutch). Porsche uses heavy dual mass flywheels stock which while muffling the noise so you don't hear it will cause the car to rev much slower.
you r very correct- i had not enough time to elaborate due to my work... but since he has to put one anyway- he might go with a aftermarket since the porsche is somewhere around $1700 as well.
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01 996TT - 9.91 sec.145.64 mph 1/4 mile (4.62 sec. 60 to 130mph) 06 CLS AMG
If you think clamping force doesn't make a difference then you are very mistaken. I do agree the stock clutch should have been fine, but the bottom line is depending on the power the clutch can slip in the middle of the run. Try running a stock clutch in my car or even anything short of the 2 disc system. I could blow it on one run after break in.
Yes. the stock GT2 pressure plate is the same as the TT.
Originally posted by PorschePhD Yes. the stock GT2 pressure plate is the same as the TT.
I would guess the stock Turbo/GT2 clutch is designed not to fail right above the stock FWHP level of the GT2. There is probably at least a +15-20% design factor; probably more. Based on these assumptions, it doesn't seem like the OEM clutch would face any problems...with proper use...at Stage 2 or Stage 3 levels.
Not really. Stage IV will present problems, 4gt will blow it apart. The upgrade would be in the flywheel. That is a worth while change for the lower kits.
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