New Clutch Required, Exedy Or Xtreme?

[Bass Junky]

Hey peeps.

I've currently got an Exedy Heavy Duty in my car, but the clutch is knackered.

I'm upgrading to either of the following clutches..

Exedy Hyper Single style, with the 7 or 9 ceramic buttons, sprung centre.

OR

Xtreme Clutch of the same style.

I don't mind the a heavy clutch, I don't mind a bit of harshness.

I drive the car everyday.

I have 250rwkw and a fat power curve.

I drag, I track, I drift.

What is the difference between the two clutches, and does anyone have any experiences, or comments on them?

All Help Appreciated.

BASS OUT

[Busky2k]

Exedy. I only ever hear about bad things about Xtreme from all of my friends who had them. I did have one at one stage, did OK but yeah...

[Leadfoot]

I can vouch for the performance of the Xreme 9 puck cushioned ceramic clutch.

I have done some track days with it and I generally give the car a bit of a work out anyway.

My car dynos at 250rwhp so this is not an account of the clutches power capability.

However, I can certainly vouch for its drivablity characteristics which, to me, is very important.

Just for reference I went for the heavy duty version which is hard, but not totally ridiculuous. If you get caught in one hour of heavy trafffic it might become a little bit tiresome but nothing that your calf muscles wont eventually adapt to. It is also recommended the flywheel is faced which I had done as well.

The clutch feels really smooth for about one week till it wears in (about the same feel as an organic clutch). After that the pressure plate beds in and it develops its proper bite.

The typical issues with puck and brass button clutches is their on/off nature.

The XTreme 9 puck does not suffer from that as such.

It is quite possible to slip the clutch with a degree of control, for example an easy take off from the lights when being followed by Mr Plod. The let out point does become a bit sharper but once you find where that is its not a problem.

Reversing however is a bit trickier as a chattering or reverberation in the drive train can start up which requires you to push the clutch back in and try again.

However once you learn to use a few more revs than you would on an organic clutch, say about 1800rpm, there is no chattering or jerking at all. The only time it happens to me now is when I forget or I am trying not to wake up the neighbours early in the morning.

On the power capability side it will chirp the tyres between 1st and 2nd gears if your powering hard and the revs arnt right. It definately feels much stonger than the stocker. At no time does it feels that the clutch might be slipping even at the traction limit of the rear tyres. However by the same token its not that harsh that it could be severely shortening the lfe of the transmission.

All in all I would say the Xtreme 9 puck is a really good compromise between power capability, aceptable feel and smoothness, passenger comfort and longevity on the drivetrain. Once you learn the intracacies of it the car can be driven just like it has the stock clutch and no one would even know.

Ken from Hyperdrive (Perth) was installing a lot of the Xtreme 9 puck cushioned ceramics about 12 months back when I had mine replaced. He said he was putting them on cars with up to 400rwhp. Might want to send him a PM or even give them a call if you want a second reference or to see if his opinion has changed.

[Duncan]

we run the exedy 7 puck clutch with an uprated pressure plate in the race cars, 250atw and plenty of high rev launches, they are great.

[Bass Junky]

Thanks for the Info Guys.

Whats the Exedy like on normal driving Duncan?

Leadfoot. Great Review!

[BHDave]

Are you changing the entire clutch or just the friction plate? It would make more sense to just reco your existing pressure plate and if possible get a heavier spring if you're thinking along those lines.

Then just replace the friction plate, and there is really bugger all difference between different button style plates. You could possibly even have your current plate re pucked.

What sort of friction plate do you have now? If you are drifting and so popping the clutch i'd be leaning to towards less pucks, either 3 or 5.

Drivability isn't that bad with current generation ceramic buttons either.

My 9 puck xhd extreme has almost the same weight as the stock clutch, is only fractionally biteyer (is that a word?) than stock and is happily holding down 240rwkw. I don't drift or drag though. If i did i'd look at a 5 puck plate minimum.

[Bass Junky]

I've currently got a full organic clutch.

The Exedy Heavy Duty thing.

It's torched, and I don't want it to happen again, so I'm doing two things.

Replacing the clutch with a super duper one, and the other one has something to do with other people driving my car!

[Duncan]

haha I think the second may be your main problem

I may have lied I think mine is 5 puck not 7. Anyway...for street drivability, well I use it in a race car so my expectations are different....but it is heavier and bites harder than a standard clutch but it is still very driveable, much better than a multiplate

[predator]

I've installed the xtreme 9puk cushioned ceramic behind a lightened flywheel.. good for around 300rwkw supposedly. Seems fine so far, doesn't have a massive bite, so you won't get instant wheel chirp if that is your thing. You might not like it if bang, bang bang is your style.

Feel is about the same as my Pulsar so its a very easy clutch to drive.

Haven't given it a massive red line workout yet to see how it copes with that. Will have to see how it goes on the track next month.

Price is about $500 for the kit with the pressure plate. There is a 1000kg pressure plate available as well for $200 more or so.

[GTRNUR]

So where are the best places to look for a clutch for the right dollars?

Cheers,

Ian.

[2rismo]

Jim Berry - Race Clutch/Italia Spares

07 38479999

[Bass Junky]

okay, I just got the thing fitted.

All good.

BUT

It feels extremely light and it's very off putting.

It's about a third the effort of my previous Exedy Heavy Duty with Organic Plate.

Any suggestions?

[Bass Junky]

This person had same concerns

http://www.skylinesaustralia.com/forums/in...howtopic=122238

[BHDave]

Do you know what the pressure plate is rated at and if it has an altered pivot point for the diaphram?

I found that my XHD xtreme was ligher than an HD. The XHD felt about the same as stock.

[Bass Junky]

No idea.

But this thing feels like a shagged out thing.

I'm sure it's not, and I'm sure it will be fine and handle everything I can throw at it, but it's just disconcerting that's all.

[2rismo]

Jim Berry - Race Clutch/Italia Spares

07 38479999

[Bass Junky]

okay, after a few more kilometers, it's feeling much better.

I drove around an Echo in Broome for two weeks, let me tell you, that's a shit piece of gear. That's a crap clutch!!

So anywho, feeling better after being run in a bit more.

Feels good, shudders a little but all in all, very nice.

Maybe I needed a week in a piece of shit to realise that my clutch isn't too bad at all.

cheers

Pete