Doing lots of power upgrades are the moment. Wanna be sure the clutch will hold this power Z1 GT600r turbos. Japtek SMIC. Dual intake Turbo back exhuast. 3" Split dumps. nistune 740cc injectors Boost will be decided when its getting tuned. Unbuilt bottom end and heads. Doubt I will break the 350rwkw. on pump fuel. But might do much more on E85 So, Would a exedy organic HD be up to the job? Do i need to look for something more clamping. I feel the car isnt would be up to stages of needing a puck or button clutch.... Or would it?
yep button clutch the go, we ran only 236 RWKW and would slip a heavy duty organic clutch in 4th and 5th changed to a 6 puck only $280 never slipped again in its life only trouble with them is that the clutch is either in or out no good for stop start traffic there's no in between ie partial slip with them
A standard OEM clutch would be up to the job, how long it lasts, will depend on how you treat it. The questions are: How much power does the engine produce? What area (drags, circuit, street) do you think your clutch will see the most abuse? Is it a daily driver? You could cover your bases & opt for a carbon triple plate, but you probably won't enjoy driving it.
I would be looking at a JIM BERRY clutch like rob260 has. you want "more" not "enough". still a single plate.
UAS have a very very nice twin plate thats not too expensive and very streetable. I believe Black Beast has one fitted to his car. Dave
I've got 271 rwkw and this clutch handles it no problem, which it should because it can supposedly handle 1000hp (others say 800hp but its a lot): RPS Twin plate Carbon-Carbon Clutch http://www.z1motorsports.com/product_info.php?cPath=6_385&products_id=106 I absolutely love this clutch, it rockets you off the line like you wouldn't believe. Its also very unpleasant to drive in traffic, takes a lot of concentration and effort not to go rocketing into the car in front of you in traffic. Easy to drive fast hard to drive slow with it. Actually you'll probably regret it if you get this clutch but I don't its fantastic I absolutely love it. At one stage I was considering getting a triple clutch or maybe even a quadruple or even a quintuple (they're out there). But now having driven a twin plate there is no way I would get a triple.
There are more options than just week full plate or unsprung button clutch. As Z32TT said Jim Berry has a great reputation and probably knows more about clutches than anyone here. If you want a local (Canberra) dealer Damien Hawkes from Racing Ready is an Exedy dealer and gives pretty good service, he's a salesman not a clutch expert though so take his advice with a grain of salt. Exedy have options like high clamping composite plates or puck style clutches with extra spring cushioning for softer engagement
I just know I have a spare of whatever JP used in the slotcar. Grabs fine. But sometimes traffic is a slut
you have the 1300kg 6 puck single clutch which I used to run .. it shudders especially taking off on a hill . if you upgrade go the twin plate I have .
If you want a single plate I've got nothing but good things to say about Jim Berry http://www.motorsportworld.com.au/outlets/raceclutch/ clutches. Much smoother and quieter than the UAS clutch I used to have and it has more than double the clamp load. I started with UAS clutch/UAS flywheel, going to Jim Berry Clutch/UAS flywheel was a bit of an improvement, going to Jim Berry Clutch/OEM flywheel is the best the car has ever felt. I went with a single for a couple of reasons. It's quieter, not as hard on the driveline, and cheaper (especially if you already have a serviceable flywheel) and holds bucket loads of power. There are 9 second VLs running Jim Berry singles. Downside with the big single is that you really do feel the extra weight in your left leg. If i was going to a twin plate I would go to these guys http://npcperformance.com.au/ -they get awesome reviews on the skyline forum. Quoted me $1800 or thereabouts for a Z32TT twinplate last time I was shopping around. A little more expensive than the Z1/Tilton (I don't think Z1 actually sell this anymore but it's a Tilton clutch and UAS can supply one if you're interested) but having had a "bespoke" clutch I'd never go back to off the shelf. The difference is night and day.
Z1 is a "competition clutch" and you can buy direct from them JP is wrong . (he said looks like a tilton) I looked at the Berry's but for the price and rebuild price and performance advantages of the twin I couldn't fault them now always debatable whether you agree with this or not also reason why you had to go back to OEM flywheel due to lightened one flexing. In order for conventional single disc clutches to meet the needs of a high powered car, the pressure plate clamping force must be substantially increased, resulting in increased pedal effort. This translates into more lateral force being applied against the crankshaft, which results in premature wear of engine thrust bearings particulary on cold starts. Total VG30DETT engine failures have been attributed to excessively heavy pressure plates, which may have been required to achieve enough torque capacity to prevent a single disc clutch from slipping in a high powered car
