Exedy Twin Disc Sucks My White A$$
so what are people with 350-420 whp supposed to do??? get the exedy twin disc or the act? or does everyone have to spend over 2g's to get a good clutch??? It seems to me that an act and a fidanza flywheel are only a couple hundred less then the exedy twin disc, and if the twin disc is better with engagement then that seems the smarter way to go, but why are people blowing through them within one year and under 15k???
I guess none of use are taking into account of how people drive as far as haw they drive daily. i had a friend with an altima that went through stock clutches ever 15-20k and it was cuz he rode the clutch out just a little bit every time he shifted. not enough to smell but enough to kill 3 clutches in under 60k. maybe some people do that???
I guess none of use are taking into account of how people drive as far as haw they drive daily. i had a friend with an altima that went through stock clutches ever 15-20k and it was cuz he rode the clutch out just a little bit every time he shifted. not enough to smell but enough to kill 3 clutches in under 60k. maybe some people do that???
ACT seems to be a great combination for that power level. Seems to work for many. Did not work for one of our customers that was making around 350whp at the time he had that. It was very inconsistent as it would slip sometimes after a hard launch. The disk glazes. However it seems to be working great for some other people.
Originally Posted by TurbotrixRacing
The pedal didn't go to the floor. The free play was gone and it wouldn't disingage fully because it got heated up. Everything warps and turns a nice shade of purple to match the clutch cover. Twin disc style clutches don't like to be slipped. Carbon is a little different but there are problems associated with using it. Keep in mind that clutches are wear items that get abused and need to be changed regularly. The more power you make and the harder you drive will dictate how often they need to be changed or serviced.
Three letters....ACT. I've been using them since the early 90's for one reason, they work. I've been offered lots of clutches from many different companies and I never strayed. If something works don't f*** with it. Believe me, if ACT couldn't make us something that held up I'd have to go elsewhere but that's not the case. They constantly work with us and other shops to improve their products and it pays off for everyone. Try calling Exedy for help....
Jeff
Three letters....ACT. I've been using them since the early 90's for one reason, they work. I've been offered lots of clutches from many different companies and I never strayed. If something works don't f*** with it. Believe me, if ACT couldn't make us something that held up I'd have to go elsewhere but that's not the case. They constantly work with us and other shops to improve their products and it pays off for everyone. Try calling Exedy for help....
Jeff
Don't listen to marketing hype, check around. Look at all the competitive racing events and see who's carbon clutch wins. Tilton has to have the best record out there, the fastest supras with 6psd have run Tilton. I go to alot of NHRA events and most of the top teams use a tilton, that has to say something. If you do search on supraforums you will see which carbon clutch falls apart and whatever. People who got a free clutch have a way of embelishing the details.
As for the ACT it is a great clutch, other clutch companies out there will tell you about problems that don't exist with ACT but the truth is it works great. I do know for a fact that the worlds fastest evo runs it and has had no issues all last season.
I myself have been using ACt for over 6 yrs, no problems really. Right now I am switching because at 151 mph and 3050lb with driver the clutch doesn't like the heat at launch anymore, but it has been great up to this point.
Since the evo has been graced with the 240mm clutch size, it handles alot more torque than the 225mm size in the talon, more surface area in the torque equation, and radius of gyration.
For a stock weight evo, running up to about 145 mph in the 1/4 and wanting something streetable that will still hold the power look no further than the ACT 6 puck and their pressure plate, mated with a fidanza or ACT flywheel you cannot beat it pricewise and it performs really well.
Sean
As for the ACT it is a great clutch, other clutch companies out there will tell you about problems that don't exist with ACT but the truth is it works great. I do know for a fact that the worlds fastest evo runs it and has had no issues all last season.
I myself have been using ACt for over 6 yrs, no problems really. Right now I am switching because at 151 mph and 3050lb with driver the clutch doesn't like the heat at launch anymore, but it has been great up to this point.
Since the evo has been graced with the 240mm clutch size, it handles alot more torque than the 225mm size in the talon, more surface area in the torque equation, and radius of gyration.
For a stock weight evo, running up to about 145 mph in the 1/4 and wanting something streetable that will still hold the power look no further than the ACT 6 puck and their pressure plate, mated with a fidanza or ACT flywheel you cannot beat it pricewise and it performs really well.
Sean
Originally Posted by blitz118
Do you have any personal experience with the RPS cutch besides what you've read? Do you have one in your car? Have you driven or raced with one?
For $3,000 why not just get a Tilton clutch that has been proven to work?
For $3,000 why not just get a Tilton clutch that has been proven to work?
As far as I know they don't as the tilton uses push style diaghrams right now but I hear they are working on something.
The exedy and all the rest except rps are not carbon on carbon, so there are metal plates to warp. There is a benefit to those but it is limited by the fact that not all friction surfaces are carbon material. With the RPS style the clutch disks are metal, but faced with carbon, I would think that with enough heat from abusing the clutch that backing would evenutally warp and cause a problem. Tilton uses carbon for the entire disk, even the structural material, so you can slip iut from here to eternity the only thing you can damage is the $45 diaghram spring.
Sean
The exedy and all the rest except rps are not carbon on carbon, so there are metal plates to warp. There is a benefit to those but it is limited by the fact that not all friction surfaces are carbon material. With the RPS style the clutch disks are metal, but faced with carbon, I would think that with enough heat from abusing the clutch that backing would evenutally warp and cause a problem. Tilton uses carbon for the entire disk, even the structural material, so you can slip iut from here to eternity the only thing you can damage is the $45 diaghram spring.
Sean
Last edited by Sean I; Nov 10, 2004 at 02:20 PM.
Yes you can get a Tilton just need to do custom flywheel. Somebody locally has already done it on a DSM and a Evo.
Does anybody know of Turbotrix is using solid hub or sprung hub? Is anybody making big power and drag racing this clutch frequently like every weekend?
Does anybody know of Turbotrix is using solid hub or sprung hub? Is anybody making big power and drag racing this clutch frequently like every weekend?
Originally Posted by RPSPP
The rumor on heating the C/C clutch to raise the co-efficient of friction is true for both RPS and Tilton. For a C/C Tilton 7 1/4" the largest size available from them, the clutch will support a high HP car but will be slipped to raise the co-efficient of friction and will change the torque capacity. Slipping a Tilton to raise the co-efficient of friction will result in to an on/off switch engagement (especially when the whole assembly weights less than 16lbs. As for RPS's 10" C/C dimension clutch and the PP clamp load being only at (2100~2200) we have the capacity to go higher in clamp load if it's necessary if it slips too much. The technology is supporting other cars making more torque and using the same pressure clamp load. Supporting street car that make 40lbs of boost two stepping and not a hint of the clutch letting go! 
All of that said, who is winning races with the RPS carbon stuff? It seems nobody really runs them. I can list off a few oems including porsche that uses tilton as oem equipment. All the bigname guys at the races use tilton.
Matter of fact both Bullish motorsports and Titan motorsports, the fastest 6 spd supras ran on the tilton clutches. Talking is one thing track record is another.
Sean
Originally Posted by RPSPP
Hi Mark & Jeff,
I would like to know one thing, is the ACT 6 puck any smoother than the 3k clutch that you are talking about? RPS has always been the clutch leader in smooth engagement and having the patented technology to provide the very best clutch money can buy. Innovators are always looking to be on top of the game. I'm with RPS cause we cover all of the bases and more!
I would like to know one thing, is the ACT 6 puck any smoother than the 3k clutch that you are talking about? RPS has always been the clutch leader in smooth engagement and having the patented technology to provide the very best clutch money can buy. Innovators are always looking to be on top of the game. I'm with RPS cause we cover all of the bases and more!
it to me and it's been in my 370whp street car for 32,000 miles. It's been flawless.
When we built the race evo we threw a lot of parts together and hoped for the best based on what we learned for the 1G and 2Gs. As for the drivetrain, we used completely stock parts with a off the shelf ACT pressure plate and unsprung 6-puck disc. If something broke we'd find something stronger but we've had no driveline problems at all so far.
I'm not so sure about anyone besides ACT being the leader in clutch development for the Mitsus. They have been there since the beginning and if you look at what all the fast cars are running you'll see ACT's name most often. Hell, Shep is running 8's on a single street disc.
-jeff
Last edited by TurbotrixRacing; Nov 10, 2004 at 02:44 PM.
i had an ACT unsprung 6 puck clutch with a Jun flywheel in my 5th gen prelude... it worked awesome, but i disliked the chatter... when i'm ready to buy i'll get something that works and is practical for street use...
Originally Posted by TurbotrixRacing
I'm not looking to start a was I just wanted to recommend ACT to our customers. We were using Exedy in the beginning for our customers because it was supposed to be the best....not so. When ACT made a clutch for the evo the gave
it to me and it's been in my 370whp street car for 32,000 miles. It's been flawless.
When we built the race evo we threw a lot of parts together and hoped for the best based on what we learned for the 1G and 2Gs. As for the drivetrain, we used completely stock parts with a off the shelf ACT pressure plate and unsprung 6-puck disc. If something broke we'd find something stronger but we've had no driveline problems at all so far.
-jeff
it to me and it's been in my 370whp street car for 32,000 miles. It's been flawless.
When we built the race evo we threw a lot of parts together and hoped for the best based on what we learned for the 1G and 2Gs. As for the drivetrain, we used completely stock parts with a off the shelf ACT pressure plate and unsprung 6-puck disc. If something broke we'd find something stronger but we've had no driveline problems at all so far.
-jeff
Newbie
Joined: Oct 2003
Posts: 82
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From: OXNARD
Originally Posted by Sean I
Don't listen to marketing hype, check around. Look at all the competitive racing events and see who's carbon clutch wins. Tilton has to have the best record out there, the fastest supras with 6psd have run Tilton. I go to alot of NHRA events and most of the top teams use a tilton, that has to say something. If you do search on supraforums you will see which carbon clutch falls apart and whatever. People who got a free clutch have a way of embelishing the details.
As for the ACT it is a great clutch, other clutch companies out there will tell you about problems that don't exist with ACT but the truth is it works great. I do know for a fact that the worlds fastest evo runs it and has had no issues all last season.
I myself have been using ACt for over 6 yrs, no problems really. Right now I am switching because at 151 mph and 3050lb with driver the clutch doesn't like the heat at launch anymore, but it has been great up to this point.
Since the evo has been graced with the 240mm clutch size, it handles alot more torque than the 225mm size in the talon, more surface area in the torque equation, and radius of gyration.
For a stock weight evo, running up to about 145 mph in the 1/4 and wanting something streetable that will still hold the power look no further than the ACT 6 puck and their pressure plate, mated with a fidanza or ACT flywheel you cannot beat it pricewise and it performs really well.
Sean
As for the ACT it is a great clutch, other clutch companies out there will tell you about problems that don't exist with ACT but the truth is it works great. I do know for a fact that the worlds fastest evo runs it and has had no issues all last season.
I myself have been using ACt for over 6 yrs, no problems really. Right now I am switching because at 151 mph and 3050lb with driver the clutch doesn't like the heat at launch anymore, but it has been great up to this point.
Since the evo has been graced with the 240mm clutch size, it handles alot more torque than the 225mm size in the talon, more surface area in the torque equation, and radius of gyration.
For a stock weight evo, running up to about 145 mph in the 1/4 and wanting something streetable that will still hold the power look no further than the ACT 6 puck and their pressure plate, mated with a fidanza or ACT flywheel you cannot beat it pricewise and it performs really well.
Sean
LOL, it seems as if you are at war with RPS! What didn't I do for you? You called and asked all the questions about our clutches and still bugged me and Marco from Magnus about our C/C for your talon. Since you were in a budget to purchase one (since your ACT 6 Puck and on your 4th or 5th fidanza FW took a **** in your car) and you were complaining about it you were going to get a clutch from me
Let me see, RPS or Tilton....
At least those are the two names that were running in your mind.
Newbie
Joined: Oct 2003
Posts: 82
Likes: 0
From: OXNARD
Originally Posted by Sean I
As far as I know they don't as the tilton uses push style diaghrams right now but I hear they are working on something.
The exedy and all the rest except rps are not carbon on carbon, so there are metal plates to warp. There is a benefit to those but it is limited by the fact that not all friction surfaces are carbon material. With the RPS style the clutch disks are metal, but faced with carbon, I would think that with enough heat from abusing the clutch that backing would evenutally warp and cause a problem. Tilton uses carbon for the entire disk, even the structural material, so you can slip iut from here to eternity the only thing you can damage is the $45 diaghram spring.
Sean
The exedy and all the rest except rps are not carbon on carbon, so there are metal plates to warp. There is a benefit to those but it is limited by the fact that not all friction surfaces are carbon material. With the RPS style the clutch disks are metal, but faced with carbon, I would think that with enough heat from abusing the clutch that backing would evenutally warp and cause a problem. Tilton uses carbon for the entire disk, even the structural material, so you can slip iut from here to eternity the only thing you can damage is the $45 diaghram spring.
Sean
NOT TRUE! Been there done that on a 1453RWHP Supra that had over 80 dyno pulls that is unbelievable! Saad Saad would pull this crazy dyno pull like this...
In 4th gear rev it up around 7k and slips the crap out of it until the C/C glows orange and dumps the clutch and makes the pull. ALL of them like this!!! And takes it to the track and makes 9sec passes with the goodyears spinning all the way down the track. After the Pomona track event we had it inspected for wear and flatness. Each friction disc surfaces were only worn 2 thousands! With that measurement in mind the PRO disc certainly came through in our real world testing. Incredible, that the same technology can be applied to any RPS C/C clutches.
Last edited by RPSPP; Nov 10, 2004 at 05:08 PM.