Since my ECU tune, BRV's and sport cats I have gained about 90hp/tq and the clutch is starting to slip quite a bit. I use this car for mainly in town driving but plan on doing some DE's and track events with it. So only 5 to 10% track.
Probably going to get an aluminum light weight single flywheel from EVOMS. I understand that there will be more clanking noise at idle which I have heard before in a GT2RS and dont think its that bad, and the car will be much more responsive.

From those of you that have gotten this type of clutch what are your opinions on what I mentioned?

Since I will have RSS do the work I will also have them do a stage 1 or 2 suspension upgrade to improve chassis control and feedback and to decrease any understeer. They say it should not ruin ride quality, hope they are right.

I do not want to spend a lot more money but am considering 1 or 2 more power gaining mods like either intercoolers or some new headers, which would also require my ecu to be retuned. That should put me close to 650hp/tq.

I am leaning towards the headers, any opinions?

Lastly, I am considering an exhaust. This has the least priority for me right now. I understand that part of the stock exhaust is titanium from Akropovic but not all of it. And a new Akropovic exhaust is around 9k, I am not willing to spend that much on an exhaust. But a europipe will be less than 5k, and is quite popular for the regular turbo. I have never heard anyone put one on their GT2.

Any experience with europipe on a GT2, please give opinions.

Thanks

 

I have been running a lwfw clutch for more than a year. At first I had a sachs 4 puck unsprung clutch which was great on the track but not so good on the street, now I changed my clutch for a sachs 6 puck sprung clutch which is way better on the street to drive and will drive it on the track next month.

I highly recommend a lwfw for the gt2, it increase throttle response and also makes heel-toe much more better. For me there wasn't any downsides as I dont mind the rattling which isnt noticeable, only somewhat when the A/C is used.

Regarding RSS suspension parts I dont have any info regarding their products but I think Sharkwerks did a gt2 a while back with RSS parts. (you can see it on their website under projects)

In term of adding 1 or 2 parts to increase power I dont think intercoolers will add power but will let the car run more periods with constant power instead of heat soak. There is a controversy regarding headers on Porsche's as its not worth it and gains are minimal this is the case with running stock oem vtg turbos. Akrapovic makes great exhaust but there isnt a clear video where you can have an idea on the sound for the gt2, and the price is very expensive. I would recommend you install high flow cats or even run catbypass pipes, this will add power, sound is great and easy on your wallet.

But again it depends on your driving is it more for the street or track.

 

My two cents:

1.) I am also upgrading my clutch this winter and will be using the sachs 2.5 with stock flywheel. I don't like lightweight flywheels for street applications, but they are nice at the track.

2.) I am doing intercoolers this winter. The IATs this car runs are absolutely insane IMO. This car needs better intercoolers, bad. There is data out there that shows how much IATs are improved with aftermarket units so I would suggest searching. I think you are wasting money on manifolds without doing intercoolers first - especially with a tuned car. GIAC makes a tune specifically for GT2s with intercoolers.

3.) I have a GMG Ti exhaust (which is also not all Titanium) and get CELs. I know not everyone gets them, but I do. They come and go, and are more frequent when I run higher octane gas and do not drive the car hard (cat efficiency codes, cats need heat). I am going to try and use O2 spacers to help a bit, but that is going to be a bit of a ***** because of where the bungs are. Will see what happens. I do not know how much power was gained from the system over stock.

 

I can only add 1.5Cents worth. I will not mention names but I was working with a tuner and we tried many different headers and even tried custom making them and in the end the best ones turned out to be the stock ones.

 

Marcus,
Can you explain why you do not like these clutches for the street?
And regarding your exhaust, do you like the sound. Is the improvement in sound worth the money?
I already have the 200 cell sport cats so would I really be getting that much more flow from this exhaust?
Thanks

 

Thanks for your input.
I am not sure what the differences are between the clutches you mentioned, why is 4puck not good on the street and why will the 6puck sprung be better?

I already have the high flow cats and it sounds a little better under load, so not sure if an exhaust will add more in terms of flow and sound.
I am already confident of RSS suspension, and will be going that route.

Very confusing though how there are so many conflicting opinions on headers vs intercoolers vs exhuast.

 

I understand your frustration around the lack of a straight forward answer to a simple question. I believe the conflicts fall into two categories for me:<?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o>
<o></o>
1) The owner needs to define exactly what they want. I am surprised how many times people say something about what they want but it turns out not to be what they want. For example, I want more power - more power on the top end, the low end or both? <o></o>
<o></o>
I don't believe you fall in this category as I have read most if not all your posts and you seem to know exactly what you want starting with the specific car you chose. <o></o>
<o></o>
2) The car and the outcome needs to be looked at in totality and each modification affects the other one - sometimes for the better sometimes not. For example, if you wanted a higher power curve across the range, that could be arranged via a number of single modifications - e.g., exhaust. However, as soon as you change the headers the power characteristics may change and you find that you loose significant power down low but significant gain on top. Now you were looking for overall power gains and the car seems to bog down off the line, one will be inclined to think that something is wrong or that someone messed up. <o></o>
<o></o>
This brings me to my point that for these types of modifications it is best to work with a tuner (not necessarily the same people who design/sell the products) to get the answers and modifications that best suit you. <o></o>
<o></o>
I think there is great value in these types of threads, but they should be read with caution. <o></o>
<o></o>
Cheers.

 

512bb,
Thanks, and I agree. You explained it quite well and I have learned over the years that these threads are informative but I must use caution.
The best feedback comes from those who have experience with the mods in question as opposed to those who assume what would be best.

 

If you have not driven a 911 with a LWFW, it is a modification that you should consider trying before buying.

Without going into all the positives, the biggest draw back is the change in engagement and feel of the pedal. Thankfully, the clutch on the GT2 is much more forgiving than the Turbo and its hydraulic assist, and using a 764 and something like an Aasco feels pretty close to stock...however, the rattle can be very prominent. If you plan on using a LWFW, consider using a sprung disc, which will help absorb some of the rattle.

 

Thanks,
This is the clutch I am considering:

Our Stage 4 RSR-AL Lightweight RACE clutch package was developed and engineered for our "in house" 850 HP 997TT. We utilize an OEM SRE “999” MotorSports pressure plate and increase the clamping force of the by about 500 Lbs. This clutch kit utilizes the technology from our Stage 3 clutch with the addition of our lightweight aluminum flywheel. This high clamp force pressure plate combined with our custom designed sprung hub ceramic disk will hold high horsepower applications without slipping. This system was specifically designed for use with our billet aluminum lightweight flywheel for a more aggressive clutch setup. This system is suitable for daily street driving and capable of handling the road course as well as the drag strip.

This clutch conversion will transmit slightly more transmission noise into the cabin of the car. At idle speeds, there is a rattle sound that can be heard which is transmission noise that is typically absorbed by the OEM dual mass flywheel. If you are concerned with this increased clutch / transmission noise, this may not be the correct clutch conversion for your application. Please contact us directly so we can help determine the best setup for your application.

Stage 4 Aluminum Lightweight RSR RACE Clutch Conversion Includes:

• SRE "999" MotorSport Pressure Plate - 4100 lbs. of Clamping Force
• SRE / EVOMS "Sport" Ceramic / Kevlar Clutch Disk with Hub and Marcel Springs
• EVOMS Aluminum Lightweight Solid Flywheel - 18 Pounds
• SRE Throw Out Bearing
• Pilot Bearing
• OEM Flywheel Bolts
• OEM Pressure Plate Bolts NOTE: Designed for engines producing up to 850 HP/TQ

I can also get a used GMG-WC exhaust from someone for half the cost of new, but I already spent over 3k on my sport cell cats. Dont assume that I will get much more flow or power from the full exhaust....just better sound,right?

 

This could turn into a very lengthy thread if we start really getting into detail about LWFW, clutches, and street driving - so I will try to answer your question as briefly as I can. The non-assisted pedal feel on the stock GT2, IMHO, represents one of the best balanced packages you can have. I personally have had many clutch setups on various cars over the years and I try to avoid compromising streetability as often as I can because the theoretical benefits often outweigh the realistic costs. LWFWs, in my experience, are rarely beneficial on stock cars and while they do improve certain things they are often more difficult to drive and often have the undesired side effect of being noisy. I have not driven a 997 w/ a LWFW but as the ever knowledgeable bbywu has said, you really should try it out before making that investment. It may not be what you expected. I drive in a major metropolitan city in traffic/etc so I would not want to compromise my ability to do that with a LWFW or pressure plate that takes a bionic leg to use. I will not be making 850hp with my car so I don't need an 850hp clutch. Given my goals, the Sachs 2.5 setup should be sufficient for my power needs and it does not compromise my cars street prowess.

The exhaust note does sound nice with my GMG exhaust, but the price of admission is quite steep. To be quite honest, the 911 turbo is not a good sounding car, whether it's GT2, turbo, or whatever - it's just not the greatest sounding car out there. The GMG exhaust does not make it a great sounding car, it just makes it a better sounding car. I don't think I could answer the question of "is it worth it" definitively. The GT2 is an expensive car, and relative to the cost of the car the GMG isn't that bad, but the benefits are somewhat limited as the factory system works pretty well. There are some gains, but not incredible ones. I would wager most, if not all, of the gains are from the sport cats and not the exhaust itself.

I think intercoolers are still the best upgrade for the GT2, based on the data I have seen. It's not just about running faster for longer, it's about just being able to run fast at all. You can heat soak the **** out of intercoolers just driving in traffic and be losing way more HP than any exhaust or aftermarket headers would gain.

Good luck!

 

Have you checked into ERP? This clutch is built by RPS specifically for Porsche. It will hold ~ 1200FT# and is silky smooth, moderate peddle pressure (about 65% of OEM), and RPS has an excellent rep in the vette and f-body markets.
BTW: I am sure they mfg a clutch with less holding power.

 

Marcus,
Thanks for the input. I want to try it out a LWFW clutch but dont know anyone in my area that has one to try. I am not really concerned with the noise, the clutch I am considering is sprung which should lessen the noise and I think will decrease the need for a bionic leg. I am used to the heavy clutch in my car now, will a lwfw be even heavier?

 

I use the stock clutch with an upgraded 890nm pressure plate on my 600hp RS Tuning Gt2, never have any problems with slipping.

 

Anyone with a Gt2 get a nice suspension upgrade? What are your thoughts:

firmness - tolerable or not?
city driving compared to stock suspension - tolerable or not ?

Planning on doing a stage 2 suspension from RSS and I know it will transform the car to be amazing but I hope it does not sacrifice drivability in town. I know it will be firmer but will it be much firmer than when you put the shocks in 'sport'?