hehe yeah it is kinda tricky at times, but I can tell you coming from a tilton clutch, the ATS dual carbon 1350kg PP is MUCH easier to drive. It was a huge improvement....that said, it still is a pain at times in slow traffic, but I still like the quicker response with shifting and the faster rise in rpms

 

One of them already has your name on it

-George
GT Motorsports

 

So how much power were you running on the JWT?

 

Hey guys, first off, I am Yoni Kellman and I handle the marketing here at Exedy. I wanted to clarify a few things, and elaborate on a few others...
Also I wanted to say a huge thanks for all of Sam's involvement with the testing and development of this clutch.

1- As far as comparing prices of clutches, mainly I want to state that this Carbon-D clutch includes a highly evolved center hub damper system, as well as a strap drive system that greatly reduces harmonic resonances from being transmitted to the driver via the drivetrain. (such as rattle and decelleration noise) No other clutch on the market has anything like this.

2- This particular clutch has been developed as a joint project between Exedy and GT motorsports.. This model includes our strap drive system, and is an exclusive part that is only available through GT motorsports.

3- Most importantly the highly engineered cover assembly is quite different than any of our competitior's designs as well, its main design strength is a very smooth and consistent pedal feel.

-also note that this is the first strap drive carbon twin that Exedy has developed. The strap drive is a unique feature that assists in elimating gearbox rattle, and has already proven itself in our cerametallic Corvette applications. Exedy developed the strap drive system in order to make a high performance clutch that can be mild mannered for daily driving, but can hold the power on race day.

WEIGHT COMPARISON
OE- clutch and flywheel 47lbs.
EXEDY/GT motorsports-carbon twin kit which inlcudes flywheel... 36lbs



Thanks for your time!
yk
ykellman@exedyusa.com

and BTW: Sam... let us know when you hit some REAL numbers like 1000HP... j/k :P

 

Thanks for posting Yoni, The added info was great!

-George
GT Motorsports

 

500+rwhp on the Scott Performance "crack dyno". So I'm estimating around 430rwhp?

 

+1

 

Thanks for the info Yone,1000 hp is around the corner

 

how is the noise quality, I have heard that other twin disc's make a noticlable noise at idle and in low rpm's. would a passanger notice a "funny" noise? Are these harsh to drive daily?

I have currently have the JWt with upraged disc, how would they compare?

 

the JWT is an organic clutch. There is no way any carbon clutch could compare to an organic in terms of drivability. Just like there is no way any organic clutch could compare to a carbon clutch in terms of holding power. IMO, this GTM-Spec Exedy is as close to organic as it gets in regards to drivability, and holds like how a dual carbon should.

The sound or what people call "chatter" comes from the lightened flywheel. The lighter, the more chatter usually. Not much chatter with this clutch either.

Hope this helps.

 

Are you saying it doesn't compare in streetability? How close of a feel does it compare to the oem clutch, if you can remember? I can't test drive one first so I'm relying heavily on realistic and honest reviews.

 

The JWT feels like stock...just slightly firmer with the clutch pedal.

The Exedy is a bit firmer than the JWT, and slightly narrower engagement area.

I honestly don't know how else to describe it. I haven't tried many clutches...just OEM, ATS DC, JWT, and now GTM-Spec Exedy. So it's easier for me to compare since I loved the JWT and hated the ATS. But if you just go from oem or JWT to this Exedy, you probably wouldn't feel as good as I did, but it's something that you could get used to driving very easily on the streets, and in traffic.

Hope that makes sense.

 

Well, I just had this clutch installed on my G, and I'm waiting for an upcoming track day to give a full review, but for a very short review, I can say the following:

Pedal effort is about 110% of stock pedal effort. In other words, just slightly more.

Noise is same as stock. No idle chatter, no extra noise, no nothin'

The engagement zone (area where you can slip the clutch without it being fully engaged) is about half of what the stock clutch is. It's not an on/off switch like some high performance clutches, but there is not as much give in it, compared to stock, either.

Clamping force is awesome! My stock clutch was slipping with the JWT TT kit, but this will grab hard! I haven't dumped the clutch from 5k rpms yet, since I am still breaking it in, but I bet it will grab that hard. No slippage at full throttle in any gear.

All in all, it's a great clutch; when I get a full review together, after the March 9th track day, I will link to it here.

Dave

 

Very informative review, thanks for posting.

 

Do you still think the twin carbon, can hold 650-700rwhp.

 

This is the chart from Exedy, Your clutch is the twin solid disk. You can cross reference part numbers to make sure.

Hope this helps,

-George
GT Motorsports

P.S. SGP does carry our GTM-Spec Exedy clutches so if you would like to upgrade you can go through them

 

No sweat, I'll do a better one after track day.

 

How was the learning curve on the clutch? Did it take you a little while to get a smooth takeoff?

 

Yes, but as the clutch is getting broken in, it's getting to be no problem at all, not even on hills.

 

Further review posted here