Which clutch to buy

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Bfish
Posts: 95
Joined: Sat Nov 09, 2019 6:20 pm
Car: 1993 Nissan 300zx twin turbo manual tran

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Took the car to the dyno to get it tuned. He fixed the lean conditions and turned up the boost a little and hit 442 tq and the clutch started slipping, so I'm assuming it will be a little higher than 442. My question is, do I go hub or 6 puck? My tuner suggested a Mcleod Supreme 6 puck stage 3 and a new performance flywheel mid weight, not the aluminum light weight. What are your guys thoughts? Thanks as always!!!!!


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NolimitZ32
Posts: 7112
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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If its a street car you'll be better off with a sprung disk, lots of options for high tq out there. Check out Southbend/dxd, specialty Z's offerings, and RPS. It all really depends on how you use the car.

Bfish
Posts: 95
Joined: Sat Nov 09, 2019 6:20 pm
Car: 1993 Nissan 300zx twin turbo manual tran

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Spirited driving no track use no drag strips but I do get on it pretty hard from time to time

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NolimitZ32
Posts: 7112
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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I have SZ's SS clutch (IIRC) and its good to something like 700tq, its a sprung disk for street use. I've never dyno'd my car but its on 28RSs at 18lbs so its in the 500s. There are street clutches out there that can handle gobs of power and are much nicer to cruise with than unsprung race units.

Bfish
Posts: 95
Joined: Sat Nov 09, 2019 6:20 pm
Car: 1993 Nissan 300zx twin turbo manual tran

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Yeah I've been looking at those the 6 puck I was looking at is sprung too

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NolimitZ32
Posts: 7112
Joined: Fri Jun 27, 2008 9:07 am
Car: 91 AG2 2+0 TTMT swap/E39 BMW 540i6/E53 4.6is Dinan S3
Location: Houston, TX

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I've never understood the fascination that people have with 6-pucks. The reason to have a 6-puck is to increase the pressure per surface area on the pad, having a sprung 6-puck is counterintuitive to me (I'm no engineer, I just play one in my garage). The reason you want higher pressure per surface are is to get a quick grip for precise power delivery such as required in competition settings. when you put springs on a 6-puck you're taking away the advantage of the increased force because you're softening the momentum delivery. If you want a clutch for the street there are plenty of full face disks that are much smoother, longer lasting, and usually not as twitchy. If your car was in the 800s then a sprung 6-puck (of that fitting caliber) may be appropriate but at your power levels you can get all the performance you could ever want with compliance required of a street car from a full face disk. That's just my 2 cents.


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