boman993

I just installed an RS Clutch and LFW on my 1997 C4S and love it. It has transformed the car. I haven't yet taken it on a spirited drive, but moving it around and "keeping the revs up", I can see how much more responsive it will be on the road. Can't wait to really try it out after my alignment!

pipingken1

Is the RS pressure plate the same as the turbo PP ?

Cupcar

You can find out here http://www.porsche.com/uk/accessorie...artscatalogue/

Download the PDF for a 993 from the drop down menu, go to "Main Group- Clutch" in the main menu and illustration 301-00.

The Turbo engine is the M64/60 and the clutch plate has a different part number 964.116.028.53, which just happens to be the clutch plate for a 3.8 RSR which used the light flywheel!!! So this is a heavy duty clutch for a 993 normally aspirated car - but note here that Porsche used a power clutch for the Turbo to keep pedal pressure low.

Also note on the page that the M003 parts are light flywheel part numbers.

trophy

There is a bunch of interchangeability with the clutch parts.

The 964.116.028.53 is also the pressure plate for the 993 GT2.

My combination is as follows:
RS LWF (964 Part Number)
997 GT3 Pressure Plate - 996 116 027 51
993 RS Clutch Disk

I don't find any extra effort in the clutch pedal at all.

Cupcar

Yep, since the 996,997 GT3 and Turbo used the Metzger engine the light flywheel for the RS versions is the same as the 964 RS, 993 RS M003 cars. However the RS 4.0 used an even lighter version of the 964 flywheel with more material milled from it. It weighs 8.2 pounds and the 964 version 11 pounds.

trophy

I wish I had the RS4.0 LWF, I had the RS one in stock.... Next time

Cupcar

BTW, I used the 964.116.028.53 993 TT pressure plate and didn't find much of a pedal pressure increase. It was there, but not much.

I think though it is getting into a range where ladies may have an issue, thus a power clutch in the 993 Turbo.

Cupcar

Note it uses a different pressure plate since the contact annulus is narrower.

pipingken1

Thanks for the information.

I bought a LWF set of parts from a guy in Canada but it turns out he never fitted them.

I couldn't stop the clutch dragging (replaced the hydraulics before I took it out)

The pressure plate has a Sachs number which lists for a turbo.

Stuck the dual mass back in for now until I can figure what is wrong.

fst951

Good info here.

I am setting up a clutch package for a customer's 3.8-liter engine built by a 3rd party. I choose to use the following parts. Let me know if you guys see any issues with my choice or have other recommendations based on your experience, please.

I opted for the Flywheel 964 102 239 81 lightweight off 2011 997GT3RS overr heavier 964 102 239 31 Stardard Carrera RS
Friction Disc 997 116 013 92 off 2011 997GT3RS
Pressure plate 997 116 027 51 pressure plate of a 2011 997GT3RS
Clutch release bearing off the late 1980s 944- 944 116 080 01
Clutch Flywheel Ring Gear 964 114 143 31- this one appears deeper than others i have seen and would lead to better pressure plate capture, but maybe higher clamping force as well.
Guide Tube 950 116 813 30 appears to be the longest and correct unit .

I always appreciate good feedback please.

Thank you.

G

Cupcar

fst951- The only issue with the above is that, at least for a 1995 car like mine, return to idle without stalling is even more problematic with the GT3RS flywheel than the normal 964 RS flywheel. To solve the issue the fuel injection coast down return was increased 500 RPM earlier, the idle speed increased 100 RPM which helped a bit but the final solution also included a "reclocking" of the ISV valve which is described elsewhere on this forum. Basically clear the epoxy from the 3 hex screws at the back of the ISV, loosen and open the valve a hair more for a starting point closer to where it needs to be to idle. Doing this the car still has issues stalling but they are no more than my factory 964 RS car did which also had issues.

fst951

Excellent advice on the stalling. I had the remap on the ECU include a lightweight flywheel so hopefully that will help as well.

Ill watch this link for further advice.