This past Saturday I ran the ECS Corvette Challenge in NJ with my new Exedy single disc clutch. All I can say is that the clutch performed flawlessly in the 8 passes I made; in fact, I recorded a personnal best of 11.7 @ 120 MPH on DRs. Mine is a H/C modded car and I am, by far, not the best driver. Both the 4K launches and power shifting were smooth and clutch engagement unchanged before, during and after my runs...with no clutch smell. Also, and I think most important, I broke in the clutch for approx. 500 miles before taking it to the track. I am posting this to report a clutch changeover that worked so others on the fence about which clutch to install (as I was several weeks ago)can benefit from my experience. This unit replaced my Z06 clutch and IMO there is comparison regarding the Exedy's ability to better handle the power my car is putting down; I make no other comparison in this post.
Joe

 

I have the Excedy dual disc, which was installed back in October of last year. I too took care to do a 500 mile break in before any serious racing. I now have somewhere between 35-40 passes on the clutch with ET streets and so far, so good. I also might add that the clutch now has about 4000 miles on it and performs flawlessly in normal street driving.

 

That's great to hear as it won't be long the way i drive until my 02 Z06 will need a clutch upgrade. How much harder/stiffer is the excedy clutch on your left leg as i have arthritic knees!!!!!!!!!!!!

Glad you love your new UPGRADE and your car is RUNNING STRONG!!

 

I've been running my Exedy Hyper Twin for almost a year now, no issues. Had Rodney install it along with a new tranny. I did do about a 1400 mile break in on mine, including getting stuck in stop-go traffic for like 3 hours, ouch. After going through an LS1 and most of an LS6 clutch, I just wanted one that would perform well and last, and handle extra power should I upgrade in the future. Had over 50 passes last year, including an all-time best of 11.9. My launch technique last year being stage-bang/bang/bang(on the 6700 rev limiter)-drop the clutch-slight bog-then scoot. Hitting 1.7x 60's on half shot 275/18 BFG DRs. Not great, but not bad.

Now running same setup and 4.10s, fighting to come up with a good launch technique all over again. The bite of the exedy and the spin on the 4.10s is really challenging, finally pulled a 1.7x last Saturday at the Chevy/GM challenge at MIR. (took runner up in the Mild-GM class, woohoo!). But my launches and e/t's have been all over the place. But I digress, this is all driver improvement issues. Just wanted to state that the Exedy has been performing excellently, even with the 4.10s. I might be having some issues with my McLeod adjustable master cylinder as the pedal is sticky at halfway and full to the floor, but if I pick it up with my toe it goes right back to normal. Phil97SVT said there is a spring I can remove which will cure this, will be looking at that hard this week.

The pedal has gotten a bit softer since first install, but when most people drive it for the first time, they still usually stall it quite a bit. I would say after about 2 months I got to the point where I could pull out from a light with a smooth quiet roll out, just takes some touch.
It will wear on you if you are stuck in traffic for more than 30-45 minutes, but hey, thats what you pay for performance.

I have no particular loyalty to Exedy, and have been paying close attention to the buzz on the Aussie clutch, sounds good. If there was a serious problem, I'd tell ya. My offer still stands for anyone on the forum to test drive my car if they want to know how the clutch performs.

 

I'm another one who has been very pleased with the Excedy Duel Disk.

 

Hi Jim, as for the pedal feel, it is a little stiffer than the Z06 I had in it but not unbareable. Even with your knees, you should have no problem. As for how my car is running, with a better driver and technique and a set of ET slicks with skinnies on the front, this is a high ten second car.
Joe

 

I love my Exedy Twin. Over 75 passes on it now and it's holding like a champ. No slipping, no chatter and no smell at all. Shifts like butter...

George

 

No problems with my Exedy twin..

Clutch pressure is much stiffer than stock.

Mark

 

I actually like the pedal pressure of the dual disc. If the stock Z clutch is a 10 on a 1-10 scale of ease of pedal pressure, I'd give the Excedy an 8.5. I have driven a car with the Cartek clutch and while it has an excellent feel in terms of engagement, its heavy...a 4 on the scale.

I have been a little less aggressive on lauching then others here. I generally come out at ~ 5000 rpm. It is more a dump than a slip (but I am getting better at this), since the Excedy dual is almost an on/off type engagement...takes some getting used to, but not that hard, especially on the street. My best 60 was a 1.61 with an 11.4 on a very hot day and the car not in an optimal tune (some misfire at the top end, which appears to have been due to a bad plug wire).

 

I had the Exedy Single Disc installed 2 weeks ago. Very stiff at first. Installer unhooked the battery, so handling the idle re-learn and new clutch in tight spaces was a hard task. However, I'm yet to stall it.

I'm not excited about the 500 mile break-in. This is a weekend driver and will take a few weeks to get that many miles on it. What RPM are you keeping it under to consider it a break-in. Thanks!

 

I tried to keep it under 4K most of the time (this was hard to do). I did no redline runs until the track. I went looking for stop and go traffic which in northern NJ is not hard to do. Yes, I found the clutch tight at first but with each mile driven, it loosened up a bit; my driving technique also improved with how the clutch engaged. I also had the relearn issue which has since resolved itself, so I did stall it a few times in tight uphill situations. Overall, I think this is a quality unit which is why I posted my experience. Good luck with yours.
Joe

 

My single is doing fine also.

 

I have a twin on a road-race car. It works great! No complaints after the initial few outings. The only downside was the price. However, the shifting is much nicer due to the lighter weight.

 

Only things I've seen wrong with the Exedy clutches are:

1) Cost
2) Will not hold up to heavy drag use

They grip almost too well, otherwise. The heavy drag guys either destroy them or destroy their drivetrains it seems.

Light-medium drag use, road racing, or street use is perfectly fine.

This is just my overall impression. I have a single with 420rwhp and it has held up to everything I have given it, and is very streetable at the same time.

Dope

 

I also have a twin behind my 422. Clutch feel is overall good and it grabs very positive. I do have some chatter when it gets hot and as long as I let the clutch out around 2K it's smooth as silk. Haven't seen too many others with this complaint!

 

My Exedy single has started slipping badly after 3000 miles(I have 427) I now must decide on replacement. I am not an agressive driver and am disappointed in this performance.

 

I have an exedy dual on my office floor with 4000 to 4500 easy street miles that has two completely bare disk--so I am amazed at some of the guys getting good results from theirs---I loved the clutch and bragged about it but it is a pos and anything that expensive should not go as quickly as it did, I can't believe I have the only bad one and I know that a couple of our noted tuners have had sht results with them as well, so it would seem there must be a bad batch and a good batch, I know exedy is capable of building a good clutch but mine was not one of them, also consider the labor expense of replacing the gd thing--I for one am pissed at them and will not use their product but glad to see that many of the members have not been ripped off like some of us--I have the Aussie clutch now and it is so far at least as good a driving clutch and grabs like a bitch and I do not see that I will have a problem in the future with it--

 

Not to hijack the thread, but I have an Exedy Twin that I'm getting ready to install and I just have to ask you guys a few questions:

1. Did you match balance your new clutch assemblies?
2. Did you remove the clutch assist spring to make it easier?
3. Anyone using the McLeod adjustable master cylinder? What's your impression?
4. Did you do the "drill mod" to remove restrictions in your clutch hydraulic lines?
5. Did you install the slave bleeder line?
6. What difference did you notice with the aluminum flywheel? Does your engine spin up quicker?

Thanks for any info you can provide. Cheers.
John

 

Do *NOT* use a McLeod master with the Exedy clutch. It will not work. It will damage your clutch and void your warranty.

Mark

 

I have the Exedy twin and it has been holding up so far. I don't launch as hard as others but it has seen about 10 4000+ rpm launches ( twenty 1/4 mile passes total). I probably have 3000 street miles on mine with my 447 set-up. Hopefully it will last a while longer before having to replace it. ECS installed mine and broke it in for me.