dps214

My cayman S is ready for a new clutch, and I can only imagine it'll need a flywheel too. Is there any reason I can't or shouldn't use the GT4 parts as a slight upgrade? Prices are pretty comparable and based on aftermarket options it seems like it should be a direct fit, but I haven't found anything that specifically says that's the case.

IndigoInkTaco

Is the GT4 flywheel lighter weight?

suzuka_joe

the GT4 flywheel is 26lbs but I can't find anything on the oem S flywheel weight.

I'd probably purchase this for your application- https://www.fvd.net/us-en/FVD1140120...lbs-78-kg.html

dps214

That's my other question, what exactly the flywheel difference is. Both are dual mas so I doubt there's a noteworthy weight difference. I'm assuming that the damping is different (or possibly some geometry difference such that it wouldn't fit but I doubt that's the case).

I've considered a lightweight flywheel but ultimately don't want to go down that path for a few reasons.

IndigoInkTaco

Honestly if the GT4 flywheel isn't going to save you any weight, I wouldn't bother and would just get OEM. I've had lightweight flywheels in other vehicles and they never bothered me. Why wouldn't you consider one?

dps214

Like I said in the original post, the price is basically the same either way so unless there's some reason it won't work I'm not really seeing a downside to the gt4 version.

TMc993

Serious question...What's the upside to using the GT4 version?

dps214

Maybe I phrased the original question a bit poorly but that's basically what I'm asking. What's the difference between the two?

thecajunboy

It's worth about 5 HP on a 2.7L at Cars N Coffee conversations.

IndigoInkTaco

Is the price the same? Downside would be theres no difference but it costs more because it says GT4.

Compared to the standard flywheel? I don't think anyone who's viewed this thread knows. BBI weighed the GT4 flywheel and it shows 26 lbs. I've read the GT3's fw is about 28. I haven't seen a standard cayman flywheel weight yet. I'd be surprised if it's noticeably different than either of the GT car's weights.
All of the oem are dual mass. Aftermarket saves weight by going to a single mass. That's also why I doubt the GT4 version is any lighter than the cayman's.

CaptainSlowly

Sharkwerks sells a lightweight clutch kit compatible with all 981’s, they don’t mention the GT4 being any different from the rest

https://www.sharkwerks.com/transmiss...oxster-SHAT457