Were the single disc clutches ACT? Did you use our performance disc, stock disc or another disc? I have had a lot of positive feedback on our performance street kit with many reporting improved shifing, so your post has me puzzled. If it was an ACT, I wish you would have contacted me about it rather than to see it on the forum. The one customer who recently complained about shifting problems made a small pedal adjustment (simply raising the release point to stock position and the problem went away.

If you or anyone needs assistance regarding an ACT clutch (or other clutch for that matter) please contact me by email or phone message. I will be glad to help.

 

Dirk - I think Shiv meant a single plate as in the Exedy Hyper Single, Cusco Single, etc., whcih do tend to be quite grabby, whereas the twins are far easier units to modulate and drive

Adam

 

Adam,

Riddle me this. Why do you suppose the vr4 guys said it's really no big deal to slip the rps clutch. They encouraged it. Even Rob, the owner of RPS made it one of his selling points - that his true carbon/carbon was made for the slip drag launch and his clutch was better on the tranni because of less shock to the drive line.

Shouldn't the other makers of the carbon/ carbon be able to take the same abuse? I would find that a huge selling point for the evo, because I don't want to see a detonated transmission in my rearview mirror after a hard launch.

Will I be able to purchase a carbon/carbon at this point in time that will behave similarly? For the money, will the ATS c/c do the trick? Is it heavy and noisy or the same as the rest? From What I think you are saying , you think this is the best one, money ($500) not being the deciding factor, take the ats c/c, correct?


Also Shiv

I read this in Car and Driver pp 60 September 2003 re the clutch in your tester:[/i] A heavy and snappish Ralliart clutch ($1750)made relaxed green-light rollouts mor of a challenge, but otherwise the Vishnu Evo was mostly as mitsubishi made it and just as street friendly.
[/QUOTE]

How do the exedy and cusco compare to this unit with regard to stock pedal feel and noise. I take it you are no longer running the unit in your car. Why the change? Was that the gorilla single disc clutch?

 

I have no idea how the RPS is made or what its made to do.

What I do know is that excessive slipping of ANY clutch, regardless of what the disk is made out of, will wear the disks very quickly. Does this save the tranny - yes, absolutely. However, a clutch is not meant to be slipped excessively - it is meant to be slipped until the point that consistent momentum is achieved.

Remember, any clutch can be killed by an unskilled driver, regardless of what the manufacturer claims.

 

Exactly. This is what makes warrantee claims so difficult for auto makers and clutch manufacturers.

 

Adam et al,

Like others here, I am researching clutches in preparation of a build up.

I spoke with one of the Exedy reps at SEMA IAS this last weekend regarding the Carbon vs Cerametallic twin-disk options. The rep felt that unless the car was going to be used for a good amount of drag racing or street course racing, the cerametallic was a better choice. The gist was that the until the Carbon clutch had reached operating temp, it could be a bit tricky in daily driving. This makes some sense based on what I have read re: Carbon clutches getting better with temp. Of course the unknown there is "operating temp."

What are your thoughts on this?

Thanks,

D

 

Unfortunately, you won't like what I have to say:

"It depends"

Before you pick components, you have to figure out your usage for the car and the practical power limits you plan to reach.

Also, remember, that some carbon clutches are a mix of carbon and other materials (Cusco for example is carbon and cerametallic mix), some are all carbon (ATS), and as the guys from RPS told me a little while ago, some are all carbon (carbon disks grabbing against a carbon friction plate).

 

Hears a testimonial from a shop "Dynamic Racing" Matt M. Has got the 2nd fastest VR-4 in the country, doing low 10sec passes 1.5~1.6 0-60 foot time. Has well over 200+ 10sec passes and drives it daily! Pulled the engine for inspection and while it was out had the Twin disc measured out. It wore only 10~11 thousands off of original disc!!! The product can go as low as 60 thousands before it needs a rebuild. His regular clutch only lasted 30~45 passes before the PP and disc needs to be replaced. More HP and torque are hard on clutches & driveline, here's a large community that can say its long lasting and the smoothest clutch yet. Many Supra owners do have our C/C Twin disc on 30,000+ miles on a big single 650+hp with little wear.

The pedal effort will be like the stock clutch maybe little less. The interesting part that all of you that are reading this need to understand the true C/C technology has all friction surface mating riding on carbon. And all others (except Tilton) that may offer it for your car in a carbon clutch is the surface that it rides on are metal so it will engagement hard on the driveline and tranny. As for this technology, RPS made this kind of facing 5yrs ago (Carbon Claw), and will not go back to it when we have the cutting edge technology now to use.

Technology in C/C has different properties from a conventional friction. The C/C has a lower co-efficient of friction than a street disc when cold, when it heats up it can surpass the friction co-efficient of a ceramic disc. All this with no distortion, warping, lightweight, retain their strength at high temperatures, and have high and tailorable thermal conductivity. And C/C can not glaze over, burn up, or smell. This is a product delivered from NASA. Any more questions call us.

 

HOLY CRAP YOUR CLUTCH IS 3,795 dollars!!!! I know it good but damn! I could get a turbo kit for that much

http://www.turboclutch.com/carbon-series-begin.htm

 

I have the cuscu twin plate on my car for about 1 1/2 month. Last week the center ring that grab the through out bearing pop out. Yesterday we put the transmisssion back again, went for a ride and the ring came off again. Having this trouble I ordered the ATS dual carbon clutch with the conversion kit for push type. Any prop on this clutch.
Thanks.

 

So the cusco twin plate isn't all that great if it breaking. Do you think it could have been an install error?

BTW I like the new format but the peoples name are HUGE!!

 

This has happened with some Exedy units as well - however the overwhelming majority of people have not had such an issue at all

 

Adam,

So is the cusco the best clutch for the price? I'm looking for the best holding and most daily drivable clutch able to take 400-450whp like a champ. BTW I don't BEAT on my car or launch it all the time but I don't want to have to replace my clutch for a LONG time.

~Hooptie~

 

I have had the Cusco Twin for about a year. It holds everything I can give it. I have launched above 6K many times. I bought it from Adam, he gave me a good price. If I ever make 500whp, maybe I'll think about a $3,000 dollar clutch, but for now the Cusco does quite well at half the price.

 

...and I thought the ATS was WAY too much $$$ to justifiy using on the Evo.

Isn't that about 12% of the cost of the car?