Clutches... What are you using!

[DavidM]

There's a thread over in the Nissan forum where I asked about clutches for my 240sx. There's lots of info on the web about sprung vs unsprung as well. You're probably going to find that there's as many types and manufacturers of clutch used as brake pads. The puck type discs get more on/off with less pucks, but weigh less. The springs absorb some of the driveline shock, but can fail. You also have to figure out the pressure plate as the springs in the pressure plate determine clamping force. I wound up going with an ACT 6-puck unsprung disc with their heavy-duty pressure plate and it seems to work fine in my car. YMMV.

David

[Simon T.]

I bought a Exedy "stage 1 street" clutch for my RX-7, unsure of what it DID have, but it felt like a regular street clutch.

[Matt93SE]

The Exedy "Stage I street" is about the same as the ACT Hd/Street disc. it's good for about 50% more clamping force than the stock clutch, but typically lasts quite a bit longer.

the fun part is Exedy makes the clutch discs for ACT... I think ACT uses a "custom" marcel in the center, but the center section of several ACT clutches Ive installed had Exedy/Daikin laser-etched onto the surface. hmmmm.
Can't comment on the source of their pressure plates, but they look strikingly similar to Exedy other than the bright yellow color. then again, a clutch looks like a clutch looks like a clutch.

[erlrich]

Interesting discussion. Just to add one more data point to the mix; I've been running an ACT HD plate with a 4-puck disc in the 240SX since I put the new engine in back in '07. Granted, I only run a few events per year, so I probably have only 15-18 weekends on the engine since then, but so far I have had zero issues with the clutch or tranny (having said this, I've probably guaranteed that both explode the next time I go on track...). The engagement doesn't feel any more harsh than the oem clutch did, in fact about the only time I notice any difference is when driving around the paddock in 1st gear. I can slip the clutch just like the stock one when putting it on/taking it off the trailer, and on track I can't tell any difference (other than it doesn't start slipping after 15 mins...). I won't hesitate to use the same disc again when it's time to freshen up.