Eric_Oz_S2

M having some clutch slipping issues with my supercharged s2 which uses the same clutch dia as the na. I'm currently running the centre force dual friction setup. Have run full Sachs previously. The centreforce uses the stick Sachs pressure plate which I think is part of the problem as it doesn't seem to have enough clamping force. I get a bit of slippage on track when changing up gears.

What clutches are there for the na that have higher clamp pressure? Thanks.

Paulyy

Check out the Spec clutches. Mark in his 968 runs one, he says he loves it. Speak to Dave from Spec. He has a LS swap 944.

Eric_Oz_S2

Paully, it's coming back to me now why I didn't go spec. If I recall the spec pp is just a Sachs one (as is the centreforce). Going to the puck style results in grabby engagement, good on track, bad on street.

Ideally I would like a higher clamp pp, but not sure if these exist. Turbo pps have higher clamp force in my experience with driving 951s.

Eric_Oz_S2

Anyone?

Pizpot

You can always send a core Sachs pressure plate out to someone like Clutch Masters or to ClutchNet, and have them respring the diaphragm and add stronger tension straps. I've done this for years on my BMWs with good results. It'll give you the higher clamping force you need without having to resort to an unnecessarily aggressive disc. Beefing up the tension straps just gives it a little more "insurance" against overrev/backlash related failures.

*edit - didn't see that you're in Aus. There are probably domestic some shops that will do the same thing for you more locally.

Paulyy

Yes it's a Sachs PP. But get a full face disc and you'll be fine. You can get the option aluminium PP also if it's same as the turbo one. That's what i've got. My clutch disc is a carbon semi metalic full face. Bit to much for you though.

JustinL

Clutchnet sells both uprated pressure plates and grabbier discs. Don't go too big on the pressure plate as it's hard on the already questionable clutch fork. I have a 6 puck clutchnet disc in both of my cars and yes it is tricky to drive on the street and you have to be aggressive with it. On track it's fast and has never slipped.

odonnell

Bumping this thread - wondering if anyone has a good clutch recommendation for a street car? I won't be at 300hp (maybe 230-270?), but want to get a clutch that can handle 300 if that figure is ever in the cards for this car. I definitely don't want to mangle the clutch fork either.

porscharu

In a perfect world it would be something like SPEC's push type clutch, but they are 951 only and get a bit pricey. You alleviate two Achilles heels with this system though (slave cylinder and clutch fork).

tempest411

Why couldn't someone just run a turbo clutch? With the right bellhousing/flywheel/etc of course.

odonnell

That push style is too sweet... definitely cost prohibitive though.

I'm not really interested in a 951 clutch setup unless I can get the bellhousing for cheap. But is that a smarter solution? I see clutch kits for the NA/S/S2, but my main concern is fork failure since it'll need a stiffer PP to cope with the lower friction footprint. Not sure if a 951 setup is large(r) enough to actually mitigate that.