George3

I may have an opportunity to have a light weight flywheel installed in my 997 GT3 in conjunction with some other work.

What is involved to do this, besides the flywheel itself?

Are certain flywheels more advantageous than others?

Is any other mod necessary in conjunction with the LWF?

Are there significant and noticeable benefits to do so?

I track my car frequently.

Thanks

roberga

The LWFW is a great mod especially if you can get the labor covered. A shop will guide you through but: clutch, pressure plate, bearing and bolts. They are all Porsche numbers and made by Sachs.

340Elise

You need to get the entire RS clutch, flywheel, and hardware; you cannot just change to the RS LWFW. Sharkwerks sells the kit and has the list of parts that it comes with:

997 GT3 RS LWFW Clutch Kit

Here is the list if the link does not work:

-RS clutch disc
-throw-out bearing
-guide tube
-flywheel bolts
-throw-out bearing fork
-ring gear
-RS pressure plate
-RS light weight flywheel

Everyone who has an RS seems to love their clutch, and those with the regular GT3 who have done the conversion seem to love it even more. It appears to be one of the top, if not the top mod for the GT3.

And if you mostly track the car, then the benefits of the LWFW are even more noticable.

Btw, Sharwerks knows exactly which parts to get, including the longer bolts that the RS clutch assembly has, but for some reason Porsche does not know how to send the correct length bolts. This is what I remember Alex saying anyway.

Stephen

George3

Stephen,
I don't have an RS, just a plain old GT3. Do I still need the clutch and related parts???

.

flankenspeil

you dont "NEED" to replace the clutch yours will work fine

996toomey

If you decide to do it you may want to change the pulley at the same time.

todinlaw

+1 you should do a search on that, some discussion that it is highly recommended, some people who did LWFW had the pulley come off, check that out.

RQ_GT3

Was about to say the same thing.

Great mod, but given the recent pulley thread mentioned above add that as well if needed. Cheap insurance.

C.J. Ichiban

enjoy the faster rev response!

sharkster

Unless you are installing an aftermarket alu style flywheel then you do need to replace the clutch pack since it's different (ring gear etc...) hence you put the whole shebang in you're doing the 964 (RS) steel flywheel.

sharkster

This is from another post:

the part numbers for the pulley are:
K99610201793 for the GT3
K99610201795 (F004) for the RS

You'll also need these if you're doing an RS one:
993 102 550 80 (bolt - M14 x 1.5 x 40)
999 025 174 02 (washer - yes it's really a different part number).

It's easy to change while you're there and others have reported on a TSB for retourquing (Snowboarder) the bolt.

Weird thing is I've seen the lower one on newer GT3s. So maybe Porsche started to use those. Then again I've seen a Tiptronic steering wheel in a GT3 before too

As Colm said tho.. we know of one case on the GT3RS as well (on the East Coast). I don't know if it was over-revved as I didn't see the ECU.

You need the Porsche tool that tighens the pulley from a 996GT3.

PS. Loc-tite is your friend.

roberga

Thank Alex: No reason to do the job halfed ***. LWFW,clutch,and pp should all get replaced.

George3

My dealer does a lot of late model P-car performance work. He has heard of 4 instances in the US of the pulley failing. He suggests to not replace now because he is unsure of the other circumstances. If it needs replacing, it is easily accessible.

C.J. Ichiban

well if he has heard of 4, that's more than zero. if it's easily accessible, I'd just as soon do it with the other work at the same time

George3

It makes sense to me.
I didn't ask, but any rough idea of the pulley cost ???

.