To each his own...Like I said...have you driven one yet...if not you really can't have an opinion...We know what the tuners think...LOL

 

i use an oem sachs w the gt2 disc pwdrhound mentioned and it holds perfectly fine all conditions w 575 rwhp +/-. if i dropped/launched clutch etc, it would be a different story and i would have upgraded considerably. but for a stock k24 car that's just tuned, you'll have no issues with an oem sachs w the gt2 disc.

my previous clutch w the same mid level tuned car lasted about 100 k miles.

i was also "talked out of" going with a lwfw because the car is the quintessential "dual duty" car and the "chatter" would've ( "i believe" ) become tiresome. the dmfw suits me just fine. though the lwfw certainly revs more quickly etc.

 

I would never ever go back to a dual mass flywheel set up. Throttle response and turbo spool all
suffer in comparison to a LWFW. The reason Porsche installs a DMFW in all their cars except their hardcore RS models is to avoid any extra noise. Smoothness and drivability is priority for the average Joe which is 99% of their customer base.

 

Revving it on idle doesnt get you anywhere
It will rev faster with a lighter flywheel, if you remove the flywheel completely, it will rev even faster.
What counts is what happens when you put load on the engine.

Also the discussion has two parts, one for solid vs dual mass, and one for lw vs standard weight.

Here is what porsche says when it comes to dual-mass vs solid.
http://workshop-manuals.com/porsche/...l_precautions/

Also i would really like to know what weight the gt2rs flywheel has, as this is the only model comparable to the 996tt in this discussion.
Im pretty sure that the solid gt2rs flywheel is heavier than most lwfw beeing sold to the 996tt

 

[QUOTE=pwdrhound;4506972]I would never ever go back to a dual mass flywheel set up. Throttle response and turbo spool all suffer in comparison to a LWFW. The reason Porsche installs a DMFW in all their cars except their hardcore RS models is to avoid any extra noise. Smoothness and drivability is priority for the average Joe which is 99% of their customer base.

Hound what LWFW would be best for me ?

Thanks mate,
Tim

 

Acording to a rennlist member stock dmfw weights in at 32lbs.
And this article mentions that the gt2rs is 9lbs lighter, that should be around 23lbs then.
http://www.topspeed.com/cars/porsche...-ar168537.html

Aasco lwfw weights in at 13lbs.
So porsche choose to reduce the fw weight for their no compromise street race car, but not anywhere near the aasco weight...

 

No disrespect sir, but once again you are just plain WRONG and spreading misinformation that you get from some mechanic or that you find on the internet.

The flywheel used by Porsche in the 2007-08 997GT3RS is the OEM 964RS LWFW. It weighs right at 11lbs.

The flywheel used by Porsche in the 2011 997GT2RS and the 2011+ 997GT3RS (and 4.0) is the same exact flywheel used in the 996GT3 Cup. It is the same 964RS LWFW used in the earlier 7GT3RS with some more material machined away from the outer edge to remove more mass. It is Porsches lightest flywheel right at 9lbs.

I wonder why Porsche would install their lightest flywheel in their Turbo Mezger powered 7GT2RS flagship if according to you and your mechanic it is hurting performance?? Very strange indeed... It is clearly evident you have not driven a TT with and without a lightweight flywheel so please do yourself a favor and do so before giving opinions on the matter. You may be enlightened (no pun intended)...

 

[QUOTE=timccloud;4507108]Tim,
I would install the regular 11lb. OEM 964RS LWFW. It's about half the cost of the slightly lighter Cup flywheel. I don't know about down under, but stateside this FW is available for about $500. The part number is 964.102.239.31. Getting it from Porsche is pricey but you can get the one that does not come in the Porsche box for much less. Like I said, about $500. They are made for Porsche by Rauch and Spiegel or Sebro. You need other bits and pieces like ring gear, bolts, guide tube, etc. for the full conversion. I am running this flywheel but will likely swap in the 9lb Cup version in when my gearbox comes out again.

 

Parts list for that 4.0RS setup on my spreadsheet

https://docs.google.com/spreadsheets...VXZyAJW3PdA02I

 

The 4.0 flywheel ends in a .81 instead of a .31. The 81 is the 9lb version of the 31.

 

Thank you! Updated to read as follows:

964 Lightweight flywheel 964.102.239.81 Porsche 11lbs

Are all of the other parts the same for both flywheels? That list was gleaned from a posting awhile back for OEM lwfw so hopefully accurate. Worthwhile to also list the even lighter flywheel?

 

The .31 is 11 lbs. The .81 is the Cup 9 lb version

 

Switched it back to 31, completely confused at this point lol. If you'd like I can give you edit access, just shoot me a PM with an email addy you want to use to login. I still need to fill out the entire suspension section

 

No worries.

964.102.239.31 LWFW used on 964RS and 07-08 997GT3RS (11 lbs)

964.102.239.81 LWFW used on 996Cup and 11+ 997GT2RS/GT3RS/4.0RS (9 lbs)

 

Do you have any url's or partsnumber to point to that the flywheel is the same?
According to the article i linked to the flywheel weight on the gt2rs is reduced by 9 pounds.
According to LUK their dmfw weights 36pounds.
http://gripforce.com/product/luk-dua....6l-turbo.html

After further browsing i see several articles say the reduction is 18pounds, which should leave the flywheel at 18pounds.
Not anywhere near the 996cup's 9pounds.

You say im misinforming, but you share a photo of a car revving in neutral which has nothing to do at all with the actual performance gains, also you say that porsche uses these flywheels on gt3's NA engines which again is a different ball park than a turbo engine.

Im not saying that a reduction in fw weight is bad, but cutting it to 1/4 is not good at all imo.
You can prove me wrong by showing me information where the gt2rs actually has a 9lbs fw and i'll stop discussing this at once and go back to my cave. =)

When it comes to the solid/dual mass, it is strange to me that people recomend solids when porsche officially has warned against it, and as described over, it sounds like a box of marbles afterwards.
If you rebuild your engine and balance flywheel, crank and pulley then i see no worries, but porsche has obviously designed the engine with dual mass use, and i guess the gt2rs comes all balanced.