in2twins

I would not say Supra guys "swear by RPS", they make some good products, but ACT is better(proven to be more reliable). The Carbon Carbon is ~3k, and has had some early failures(and some succeses). If you are going Carbon, get a Tilton built for you, about 5k for a triple plate good to 1000ftlbs of torque(supra), a twin plate is probably ~4k, and will outlast your car even if you drag race like Vosko
Carl

Clutch King

you can give me a call i will help you make the right choice...... i am a direct dealer for exedy clutchs i am the only one that can put you on with racing teams and engineer of Pressure plates and clutches
http://www.mitsubishigraveyard.com/direct.html

Ranzo

OK here is my 2 cents on the subject. I have used Mazda speed and Project mu puck clutches, a Tilton Twin, and OS Giken. Tilton sucks in my opinion, I had an older model clutch and the disks were purchased new from Tilton. It lasted less than six months and the disks cracked and I had 316 RWHP. The "streetability" of the Tilton was good since it had a flywheel that weighed more than stock.....supposedly good for Drag racing. The puck clutches engaged hard and eat away at the flywheel if you have more that 300hp it will not last more than a year if you really drive your car.

I am currently running a OS giken Twin.....have had it for four years now. I drive my car everyday, I race, including autocross, about 15-16 times a year. I have 350rwhp. The last time I looked at my clutch was about 3 weeks ago and it is showing some wear...the pads are slim and there are 2 small fractures on one disc. I consider that a high quality clutch....if it died tomorrow I would not cry lord knows I have abused it.

As far as a clutch that will hold 450hp and allow you to drive like a slob......probably dosen't exist. I do not see the need to slip the clutch. Either the car is in gear or not. Learning how to drive with a nice clutch and not tailgating in traffic and so on will preserve the life 10fold. If the stiffness of the pressure pedal is a problem then it will be hard to choose. If you read the specs on a puck clutch most of them are 1000-1100kilos. A type B Giken twin is 950-1000kilos some of the others are closer to 1100 kilos. Not much of a difference if you ask me. I would reccommend a Twin Plate from a known company.

88fc3sw/HX83

I also think that the Tilton SUCKS. I use to drive it daily on the street while I was breaking in my motor(early '90s) and it didn't last 4 months. The material on the Tilton are SO thin, its ridiculous!

Carl Byck

Ranzo, what model OS are you running, do you feel it is good for ~400ftlbs? Thanks, Carl

680RWHP12A

RPS clutches work great, thats what im running, and you can slip the thing too...

Astro

hmm
seems like RPS doesn't make it for the rx7 anymore.
they used to have a single carbon/carbon and twin carbon/carbon listed
here's the page anyways:
http://www.turboclutch.com/carbon-series-begin.htm

Ranzo

I am not sure of the exact model. It is an older one, not made like the newer ones... Wow that made sense!!

according to everyone I have talked to it should hold 500hp so I dont see why it would not hold 400ft lbs. It is a nice clutch. I wil try to dig up the documentation on it and post it.

Marcel Burkett

Can you post some info on where to find replacement discs and plates ? , I recently purchaced a used one and need replacement discs and plates for it .

Clutch King

I am a Direct Dealer of Exedy and Daikin you want to know the pro and cons of mutli plate systems and can put you on the phone with the Factory and get some real answer to your Questions
http://www.mitsubishigraveyard.com/direct.html

Clutch King

http://www.daikin-clutch.com/product...esentation.pdf

Long Live The King

ZoomZoom

iTrader: (2)

Ok well here is my Dilema. I have replaced 3 ACT clutches. 1st was S/S with HD pressure plate. About 300 rwhp. Must have been bad disk it didnt last 3 weeks. second was also S/S and lasted 2 years and 400RWHP. Still looked decent but replaced Disc with 6 puck. 6 puck almost killed me in Northern NJ traffic. I trvael to NJ occasionally and it just isnt streetable. I put the S/S back in the car. Now the car has near 450 rwhp and at torque peak around 5k RPMS it will slip ever so slightly for a split second. I thought it was a timing issue in my ECU map but i realized at torque peak it will slip slightly. Now this is a known good clutch and Pressure plate. It just wont hold it well and thats on street tires. I have MY ET streets that I havnt even used yet but figure the clutch will not last even a day using them. I love the stock type engagement. I hated the unsprung 6 puck. It took alot of fun out fo driving the car daily. Also dates dont like getting thier neck snapped, LOL.
Here is what i have realized so far from this thread.
1. twin or triple plate clutches grab and hold the power. Probably the best racing clutches. Not very streetable
2. 6 puck clutches from ACT unsprung are great for drag racing. Last fairly well but eat up a flywheel fast
3. Kevlar discs with a pressure plate able to hold the power may be a great alternative to what i am looking for. The Organic disc will Glaze and fail due to the heat. Over coming this may be the disc material. Kevlar is the closest to organic material so the stock feel may be retained. By stock i mean engagement. Pedal effort i prefer to be stiff. I can feel the engagement better anyways.
4. A great alternative may be the SPRUNG 6 puck from Pineapple racing. This is also a single disc and is probably a very cost effective way to upgrade for power and retain streetability to an extent.

I havnt ever driven my car on the track. Although i would like to I havnt yet. I need a clutch that will last on the track with slicks. Will autocross and still be able to let my girlfriend apply eyeliner without lancing her eye out on the pencil. It has to last 10-15k miles under mostly street driving and a few dozen runs at the 1/4 mile and a handfull of autocrosses. I drive the car about 4-6k mile a year. So ebery 2 years wouldnt big deal. I am leaning towards what i had thought from the start. Upgrade to the extreme pressure plate and use either an organic or kevlar disc. This was a very imformative narration of various experiences with certain clutches under different circumstances. keep it coming.

tkbang

I have HKS twinplate clutch GD MAX in my fd and I love the pedal pressure. My friend has OS Giken in his FD but he loves the pedal pressure of my hks twinplate he said it feels like stock and I totally agree with his opinion. I don't know how long will the HKS twinplate clutch will last or if it will fail as early as the Tilton clutch as someone mentioned here. The HKS twinplate feels slightly ON/OFF but for streetability I would recommend it a lot. It is definitely less pedal pressure compared to ACT Single disc. In other words, I agree with carl bryck

onefastrx7turbo

iTrader: (5)

I too like the OS clutches. Ive driven a few different cars with OS twins and super singles. The RE Amemiya I think uses tilton plates, and it was stiff as hell!! The OS twins are nice clutches. Good life, and good grip too. I havent driven an HKS or ORC. But, for FD, the OS changing parts to change the clutch from pull to push only works with that clutch. Here's what I know. The OS giken one obviously works with their clutches, as well as the HKS I believe. The orc one only works with ORC. You can use the OS stuff with an ORC twin, but you have to shave some bolts down on the tranny cover. Otherwise, as soon as you hit the starter, the bolts on the tranny housing will sheer all of the bolts on the clutch cover. Driving S13's, S14's, and FD's twin plates are all pretty much the same. I can slip the clutch a bit in the S13. He has a nismo upgraded slave cylinder though, as that may have something to do with it. I drove my friends FD with an os super single, and it feels great. not too harsh, and should hold up to about 400 or so...just my .02. I recommend OS Giken

Marcel Burkett

One other disadvantage I have experienced with the higher clamping pressure of the ACT extreme set-up is the extra peddal (hydraulic pressure) required to disengage the clutch , this caused my clutch release (throw out) bearing to actually separate into two pieces !!!.
Any one know where to find replacement DISCS and PLATES for the OS twinplate clutch ???

AREITU

My friend has a '91 FC with a JDM motor (~20,000mi on it) and 164,000 on the rest of the car. He has had an HKS twin-plate clutch for about 1200miles now. He broke it in properly for 500 miles, and now it drives smoothly. It's touchy, but nothing like a puck. You can slip it easily.

BoostedRex

Marcel, check with Jason at www.jt-imports.com or with my friend David at www.RandDmotorsports.com I know that David sells Exedy and I believe he sells OS and ORC as well. Jason can get you anything you want from Japan. Hope that helps.

Zach

Fatty_FC3S

Where are these upgraded slave cylinders avaliable from? How much do they cost? I have the ability to make brackets and hoses and such to put 2 stock slave cylinders in, but would that decrease pedal effort?

Fantastic thread so far. An Exedy dealer was around here the other day and he said that they are making a twin hyper clutch, so twin organic discs. Im curious to see how streetable it is....

CTHIS RX7

I used to have a OS Giken twin plate but got rid of it, (it was a pain in the **** for traffic and parking) for a sprung 5 puck which is great to drive with and holds up to big power (held up well to 10 second passes at the strip).

Brian7

No doubt, where can I purchase an aftermarket slave cylinder for an FD?

- Brian

RPSPP

Hi,
If any one has any questions in our products please call us I'm more than happy to answer any questions.