Well in the ongoing restoration work project, I'm going to replace the clutch, as long as everything is apart. I'm thinking of going with the lightweight RS flywheel.

Obviously, the pluses are faster revving & less tubo lag. The only downsides as explained to me are some chatter noise at low rpms, & a more aggressive engagement threshold. Just wondering if anyone has this setup, & how it's worked out. Thanks.

 

Yes me.
I have a RS flywheel and Sachs GT2 clutch.

It does rev up more freely, does not stall or hard to launch.

There was some vibration in low rpm/high gears but i havent noticed it recently.

You put one on for performance i.e you are going to be reving it and driving it. If its a stop and go traffic machine that you cannot drive that hard - you may not like it but then there wont be any point in having a LWF.

 

I know Vincent on this forum is running the RS LWF, very happy about it.

The driwetrain chatter is to me a fantastic sound, some like it some don't.

It saves "a lot" of weight, revs the einge faster, low rotating mass is overall a good thing, some claim that from an acceleration perspective you win some and you lose some on a turbo car, the rotating mass helps rotating the engine between shifts thus making it faster to build turbo pressure, but I don't know if that really is the case.

I was to cheap when I changed my clutch, regret it to this day, will go LFW next time for sure together with a race clutch, I am a track junky though.

 

Hey staffan how much boost do you run on the track? Do you watch the inlet temps at all to watch out for a meltdown?

 

I have one on my C2 and I have to say it is a fantastic improvement over the dual mass. There is a bit of clatter from the drivetrain which is something to get used to but not bad. The engine on my C2 revs more like my old SC now and when you blip the gas it shoots up to 4 K easily vs the slow climb to 3k when you blip the throttle with the dual mass. I also find it much easier to rev match than before.

For the turbo it would be nice but I wouldn't do it unless you were already in there for the C2 it is a must.

 

Pat Williams put one in my c2t and it is wonderful. There is no noise or gear train rattle. Motor spools up faster. Why Porsche didnt do it in the first place I dont know. Its one of the best mods you can make on the car!!

 

Ralt, do you know which flywheel and clutch plate you have?

 

I have the RS LW flywheel and clutch on mine. No issues driving, no drivetrain issues and tons of benefit. I have done about 10K miles so far on it.

 

I went ahead with this setup, but I haven't got the car back yet.

They had it all done, & when they went to test it, there were some crazy problems with the ignition & tach. Seems that there are a couple different flywheels that are almost identical, except the markings for the sensor/pickup are different. Well, they apparently got the wrong one, hence the problems. So the right one is on it's way, & I might get my car back next week.

 

Very interested to hear about your impression!

 

Sorry Miles, didn't see this until now.
After changing to B&B exhaust I don't have control of the boost on 2nd and 3rd gear, to get lowest possible boost on these gears I dump the wg exhaust through a smail pipe pointing towards the ground. It's loud, running on the track with ear plugs (and I love lots of sound).

At 20C I have about 0.92 - 1.00 on 2nd and 3rd, on 4th and 5th (Nurburgring is a fast track) I control the pressure using my Blitz EBC to 0.90 - 0.95. Had a passenger on a few laps that looked at the Zeitronix display and I was running AFR 12.3 on the long 4th and 5th gear straights which should be okey I think.

I don't check the inlet temperature, but perhaps you mean the EGT?
Either way I didn't install my EGT sensor in my new headers, for me EGT readings didn't give me any data that I thought was useful, just constant worries "is this okey or not". The car is really fast and I have been running this kind of boost for years now, someday I will have a rebuild of the engine just hope that it will hold for another couple of years or so.

The plan is to install an adjustable WUR with an RPM switch to make things safer, but I won't increase the boost. When I face a rebuild the plan is to go EFI.

 

Sol Snyderman owner of Perfect Power, Inc., in Libertyville, Illinois, installed lightened flywheel and clutch in my 91 turbo in 1993. Car has been flawless. Certainly revs quicker; clutch engagement on take-off only slightly more difficult, but not at all unusual for a relatively high performance car with 400 plus HP. I would certainly remove and replace the dual-mass flywheel again. No doubt about it!

 

We just put one in a 965. There is no real cultch chatter to speak of and no other issues.

 

Pat Williams in Mmephis installed an F&S #3082 213 132 pressure plate and 8mm organic plate. Dont know what the flywheel was. It sounds from the feed back that everyone who has had one installed likes the modification. Seems like there are no downsides bto the change

 

I have an RS LWF and sachs motorsport clutch kit from Stephen @ Imagine Autro. on my 3.6T EFI
Very driveable ,Very quick throttle response. and not much if any rattle at idle.
I like it !
Elliot