Tune with high mileage clutch?
03-01-2019, 04:24 PM
#1
Tune with high mileage clutch?
I have a 2011 911 Turbo (manual 6 speed) with approximately 38,500 miles on what I think is the original clutch. I just had the big maintenance/inspection performed by Porsche. I specifically asked if my clutch was ok and Porsche said it was fine (Of course, you know the vague/light feeling with the original clutch set-up). Anyways, I am thinking about installing a tune; however, I was told by a not-to-be named reputable and knowledgeable person/tuner that installing a tune with the high mileage of my clutch would not be advisable as the high mileage clutch will not be able to handle the added torque/horsepower. This person recommended I do not do the tune due to wearing out the clutch very quickly and prematurely, and if I wanted to tune it is best to wait until a new clutch is installed. I do not plan to do powerful launches from a standstill, but I will punch it sometimes when it is rolling. What are your comments, suggestions, and/or recommendations? Thanks.
03-01-2019, 05:22 PM
#2
Rennlist Member
I'd be surprised if a simple ECU tune could wear out a clutch in good condition that much faster, especially if you're not doing drag dumps. Bigger turbos or ethanol or meth, sure, but unless you're abusing it I'd think you'd be fine?
Personally, I'd probably just get the tune now. Since you'll be getting a new beefier clutch at some point, might as well enjoy the benefits of a tune until that point. If your clutch is destined to last another 15k miles currently, that's a lot of time to be missing the extra power.
Personally, I'd probably just get the tune now. Since you'll be getting a new beefier clutch at some point, might as well enjoy the benefits of a tune until that point. If your clutch is destined to last another 15k miles currently, that's a lot of time to be missing the extra power.
03-01-2019, 06:11 PM
#3
Pro
Had my 997.1TT tuned (EVOMS) with 40,000 miles on the clutch, no issues yet whatsoever. I try not to do burnouts from a standstill, so I'm probably relatively gentle on the clutch.
I had a 5-speed manual Honda Accord that lasted 225,000 miles on the original clutch.
I had a 5-speed manual Honda Accord that lasted 225,000 miles on the original clutch.
03-02-2019, 01:08 AM
#4
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
On the 997.2TTS the torque of the 3.8 DFI engine with the larger GT2RS turbochargers when tuned will smoke a 40K clutch (at least with my tune)… You need the Sachs 764 pressure plate..
I base my opinion on the failure rate on customer cars..
I base my opinion on the failure rate on customer cars..
03-02-2019, 08:41 AM
#5
I would imagine this depends entirely on the torque numbers generated at the clutch/flywheel after the new tune is applied. I haven't seen any specific hp/tq numbers listed for comparison. How much torque can the stock clutch/flywheel setup withstand? What type of tune/mods are you planning on doing? Lots of variables.
03-02-2019, 11:40 AM
#6
Kevin, my vehicle is a 997.2 TT (with a manual speed); not a 997.2 TTS. I (and the previous owner) have not changed to the larger GT2RS turbo chargers, unless it came stock with the vehicle. And I do not plan to do powerful launches from a standstill, but will punch it sometimes when it is already moving.Austx911s, one of the tune options that I am considering to install is the Cobb Accessport for Stage 1 and 93 octane fuel which will provide the following horsepower and torque gains , as per Cobb's website:
Peak Gains: +14.57% HP, +15.80% TQ
Max Gains: +19.20 % HP, +19.19% TQ
I would also consider one of the custom tunes from Kevin from Ultimatemotorworks, ESmotors, or Sam at ByDesign which would provide even more horsepower and torque, and more customization to the specifics of my particular vehicle (Sharkwerks X-pipe with no changes to the Cats). Not matter what, I need to be able to switch from stock tune to custom tune and vice versa easily.
Trending Topics
03-02-2019, 02:08 PM
#8
Addict
Rennlist Member
Rennlist
Site Sponsor
Rennlist Member
Rennlist
Site Sponsor
NoSub, the 997.2TT and 997.2TTS share the same turbocharger rotating assy that was used in the 997GT2RS. The compressor wheel is larger vs the 997.1TT AND 991.1TT/s. The turbine housing are larger and flow more air vs the 997.1TT.
The clutch with close to 40K will go up in smoke once your hit 4th gear WOT. Unfortunately this is the facts. You asked me if your clutch was at risk, and I told you truth. This is not a new question. I've had the very same question asked for 10 years with the 997TT platform, 18 years with the 996TT and 23 years with the 993TT platform.. If your car had 5K to 10K miles on the clutch it would have a chance, but by 20K miles it would start slipping with the torque output from this engine.
Here is the clutch that I'd recommend for your car.
http://ultimatemotorwerks.com/clutch.html
The clutch with close to 40K will go up in smoke once your hit 4th gear WOT. Unfortunately this is the facts. You asked me if your clutch was at risk, and I told you truth. This is not a new question. I've had the very same question asked for 10 years with the 997TT platform, 18 years with the 996TT and 23 years with the 993TT platform.. If your car had 5K to 10K miles on the clutch it would have a chance, but by 20K miles it would start slipping with the torque output from this engine.
Here is the clutch that I'd recommend for your car.
http://ultimatemotorwerks.com/clutch.html
Last edited by Kevin; 03-02-2019 at 02:35 PM.