I had 10k on my excedy twin disk....not one clutch smell...nothing finally oone day at the track it started shifting like crap...so i took it apart the center disk warped...the material on the plate actually cracked off. the guys at the trans shop can't believe it they said its def defective....excedy is junk plain and simple...and their customer service is the worst thing u will ever deal with...good luck bro

 

Hrmmm my exedy triple cerametallic has been good to me. 250+ passes on it (40k+ miles on it) with a lot of those being 11 second passes over the span of a year and a half. It is starting to behave badly on dead stop starts (most load)(squeel and chatter), but that is to be expected at this point. BTW I asked and it will be roughly $200 per disk, so $600 if I only need to replace the clutch disks. Glad I didn't go with the carbon, damn.

Oh and I didn't treat it nicely I slipped the holy hell out of it. It was only late fall last racing season I started to realize I was slipping it so much and started dumping it more, resulting in much better 60' and overall times.

 

Exedy said they would do a "one time" rebuild fee of $2,400.

 

That sucks man. I wont be buying an Exedy anytime soon.

Looks like the Tilton Carbon/Carbon uses full carbon discs and friction plates throughout, instead of Carbon and Metal

 

I'm sorry to hear that. It's the same thing those two Supra clients were told when their carbons went out after 4k and 6k miles. I've got another Supra client who has waited almost a year to get a retaining clip.

 

I don't know a single clutch company in the WORLD that warrentys a clutch that intended use is RACING.

For the guy that bought a used clutch and it went out... well, hopefully lesson learned on that.


As for any premature failure on another clutch - weather it holds 1000HP or 100HP Im sure it can be killer in less then a day with either one, or a combination of: Abuse, Driver Error, Install Error, Incorrect Clutch Choice or a host of other possibilities. I've seen clutchs where the person complains of it slipping, then sends the clutch in covered in oil. I know this isn't your specific case, but there are MANY veriables to it and a LOT of people with LOTS of sucess with the Exedy Carbon.


Just look at AMS and their Road Race Evo... They ran the frickin car in One Lap of America AFTER using the clutch for build up, tuning, etc, etc... This combination of Drag Racing, Road Racing and Street Racing is the ultimate test of ANY product... let alone a clutch on a AWD car. To not have a single clutch problem, and place 3rd Overall... I really dont think you can call it junk.

 

I though YOU were waiting on your 'supplier'? Shoot man - when you called last week and I told you I could have it to you in a day.


Lemme know if you need it or if you're just stirring the pot.

 

I am waiting to hear back from one of Exedy's engineers who is trying to see what they can do.

I tried to stress to them there is no way the carbon disc should be worn this quick.

 

Personally, I wouldn't recommend the Carbon Clutch for what you have done to the car / are trying to accomplish. I know it's hindsight, but the Exedy Twin HD is much more appropriate for your car.

Just my .02.

 

After I try something with the "stock" turbo, I might try something bigger.

 

For a street driven car - I say go with Metallic, no questions.

Yes the carbon *feels* great on the street - but it's not really meant to be driven there...

I think about it like driving around on Blizzacks (snow tires)... in the condition they are designed and engineered for - they are awesome... can't beat 'em in the snow. But when you drive them on dry roads (nOT the condition they are designed for) then they wear at a redicoulous rate.

The Exedy Carbon is really built for Road Racing and Pure Drag Racing Evos... These are cars that if they drive 10,000 miles, then that covers 1-2 seasons of racing. More then enough on a 'race' clutch. However, on the street there is a lot of times when the carbon isn't t optimal (HOT) range. It's at these conditions that wear is excelled and thus causes 'premature' failure.

Again, just my .02...

 

sorry about your clutch issue...hope everything goes well. Im just curious...if a clutch is really defective shouldnt it have already gone out within the first few launches or few hundred miles?

 

The engineer said it looks like the carbon disc were toast from "over slipping" the clutch. I went to the track 2 weeks after install, 2 months after that, and about a month ago was the 3rd time. Only 3 times at the track and they were all spaced out a couple months in between.

So to answer your question, NO! Obviously it can happen at any time.

The engineer is trying to tell me that with only 400trq "YOU SHOULD NOT SLIP THE CLUTCH BEFORE LAUNCHING". Wish I knew that sooner. He said your only suppose to slip it if your making much more power than that. Makes no sense to me.

Still patiently waiting to hear from them.

 

hmm, don't know if that generalization is true. We have installed over a dozen ATS Twin-carbon clutches in Evos here in AZ and all of them are still running strong (some get launched the hell out of them, some are just for just normal driving). It's true, carbon will grip better when they are hot, but they don't just go "bad" when it's not hot enough... well, if you count the weather, then i guess it's pretty damn HOT in Phx.

Just my observation.

Mike @ Mynes Performance

 

Either carbon is way more or they are ripping you the hell off. That is more than my clutch costed brand new and apparently my clutch lasted a lot longer. You might only need to replace the clutch disks, call a vender and ask for prices on individual pieces (clutch disks, floater plates, hopefully not the flywheel). You can't really know how much the clutch rebuild will be until you figure out which parts need to be replaced. Like I said my cerametallic disks were $200 a piece.

You can probably swap carbon for cerametallic, they are probably the same pressure plate assemblies. My clutch is designed to hold up to 800ft lbs of torque, so even with your 42r you shouldn't have any issues.