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FXMD - RPS Billet Twin Disc Carbon Clutch

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FXMDBilly

FXMDBilly

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FX Motorsports Development is proud to offer the RPS Billet Twin Disc Carbon clutch.

This clutch has proven itself capable of handling high horsepower in vigorous road racing conditions, while maintaining a smooth and easy engagement for the street driver. We have used the RPS clutch on our Championship-Winning FX750 - Unlimited Class Time Attack NSX and it has handled in excess of 750whp at duration, showing very little wear. We highly recommend this very streetable clutch for high horsepower NSX owners and those who track their cars.

FXMD-RPSClutch.jpg


RPS's all new Billet Twin Disc Carbon clutch is a must have for the NSX enthusiast. This in the next generation in NSX clutches from RPS with a new pressure plate and carbon on carbon design. The NSX owner can now have it all: Soft pedal pressure, smooth engagement, long clutch life and big holding power. This kit replaces either the factory twin disc clutch (early model) , or the factory single disc unit (late model). This clutch is very streetable and virtually chatter-less.


Features include:

-Rated at 700ft/lbs of torque
-9.2lbs lighter than OEM twin disc
-17.4lbs lighter than OEM single disc
-Light pedal pressure
-Smooth engagement (carbon on carbon design + kevlar/organic flywheel interface)
-Strapless design (more rugged and durable)
-Race proven durability



Retail: $2,395

Call or E-mail for special pricing!

Billy
[email protected]
615485059_8vQXB-XL-1.jpg
 
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Continued success, reliability, and performance...
 
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FX Motorsports Development-tested RPS Twin-Disc Carbon Clutch continues to demonstrate its reliability and big-power holding capacity against the country's fastest Time Attack Cars.

Check out the in-car video of the GoTo: Racing/Dell's Nissan GTR and the Sierra Sierra EVO from the Redline Time Attack season finale at Auto Club Speedway. The FXMD-tested RPS Clutch continues to prove its reliability on track in the most grueling conditions imaginable.

Enjoy:

http://www.youtube.com/watch?v=xW1y798cKBQ


Billy
 
After driving this very street-able clutch more this weekend, it would make a great Holiday/New Year present to yourself, to your car, or from your wife (*hint hint*).

Happy Holidays!


Billy,
FXMD
 
Does this fit in all applications 01-05 both NA1 and NA2? I'm really trying to do a nice clutch/flywheel combo that's MUCH lighter than OEM on my 2004 and not having much luck figuring out how to do so with the 6-spd.
 
Well, I emailed you within minutes of you asking me to email on the 23rd - no response?
 
HIJACKER said:
Well, I emailed you within minutes of you asking me to email on the 23rd - no response?
Click to expand...
You have an email.

Sorry for the late reply. You caught me between traveling up north to the mountains for X-mas, and the wireless (and cell) reception is shotty at best. I'll be back tomorrow afternoon.

Billy
 
It's been about 3 weeks now with this clutch and I've finally been able to "stretch its legs". I don't want to super-saturate my description of this clutch with superlatives, lest I water them down, but this is truly an amazing clutch. It has the best of all worlds and I can’t think of a reason not use this clutch for any reason. Even if it comes down to replacing the OEM, this clutch has so much going for it that it is a complete no-brainer purchase.

Pedal Pressure
My current car set up is a FX turbo with 589 whp/521 ft-lbs of torque. Previously I had the RPS Stage 1 single disc clutch, which I liked. However, the clutch pedal pressure was very high and it felt like a leg press just to push down. It also had a long throw; roughly as long as the OEM clutch. Other high power clutches I’ve used, like the Exedy or Comptech, also have a high pedal pressure, but shorter throw. The RPS Twin Disc Clutch has a very light pedal pressure. It is VERY close to stock and very easy to depress. It has about the same throw as the OEM and feels very OEM-ish in pressure and throw.

Grab
The previous RPS Stage 1 clutch had a very smooth grab point and range. It was very easy to find the catch point and ease into gear, which was one of the features I praised most about the previous clutch. In terms of the grab point and range, it was similar to OEM, just with a much heavier pedal feel. It also grabbed a little higher in the throw of the clutch, near the top. The aforementioned Exedy and Comptechs, had a much grabbier clutch feel. They grabbed hard and had a very small range of feel. They were very ON-OFF in nature and much easier to stall out, especially when going at low speeds like backing out in reverse. It was very hard to avoid the hard shudder of the sudden jar of the clutch grabbing power. The RPS Twin Disc is very similar to the RPS Stage 1. It has a nice range and, like the Stage 1, is also located fairly high on the throw. The main difference is it has a tiny bit more grab than OEM and Stage 1, so you can slightly feel the difference in the amount of power it can handle. It’s very subtle but it comes alive when doing hard sprinted accelerations, when the bite feels very solid with no feeling of slippage.

Power
The RPS Twin Disc seems to be handling my power levels just fine, even though I have very high torque. The previously Stage 1 felt ok, but when we took the clutch out and examined it, we could see signs of a little glazing and a tiny bit of slippage. But considering this clutch was rated for about 450 ft-lbs of torque and I was over 500, it didn’t surprise me much. One interesting aspect is that while most clutches require a break in period, due to constraints, we didn’t have time to do that. We basically did full dyno runs the day we installed it and it hasn’t had a single problem or issue.

Oh, there is one CON I remembered after driving it today. When the clutch is depressed, it does make a slight whirling sound. It's like that aspirator whirling noise but a bit louder. It's not that loud, in that you won't hear it once you start moving (the engine and road noise will drown it out). However, at idle you will hear it. It's a tiny bit annoying in that you don't expect to actually hear a clutch, but it's a tiny price to pay in relation to all of the other benefits of the clutch.

The RPS Twin Disc Clutch is like a high power clutch that does a good OEM impersonation; it’s very similar but you can tell it’s different (in a good way IMHO). Only in certain circumstances does it hint that there is something more under the pedal than the OEM when it bites/grabs a little harder than you would initially expect, but it is a very satisfying feeling as well. There really isn’t much I can knock on this clutch and in my opinion there is almost no reason not to upgrade to it, unless you are looking to stick with all OEM equipment.
 
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Yup me too. There seems to be something glitchy with the first post or the thread. The only way I can read anything in this thread is by hitting reply and reading the back posts. :confused:
 
Is everyone still having problems reading this thread?

I have had similar problems in the past when trying to view this thread both on my BB and my computer. I might just start a new thread if this dosn't get any better.

I apologize for the inconvenience.


Billy
 
Vega$ NSX said:
Other high power clutches I’ve used, like the Exedy or Comptech, ....
Click to expand...

Just to get a comparison, did you previously use the Exedy single or dual disc, carbon or mettalic?

Without driving any of these, I'm trying to make up my mind on the RPS carbon, the Exedy dual carbon, or the Carbonetics dual carbon.


Billy - it appears you used to be sponsored by Exedy but now by RPS. Without reference to driveability, noise, etc, how has the RPS held up to your power levels compared to the Exedy? I'm concerned about the RPS's organic liner being a weak link.

Thanks,

Dave
 
Sixteen months ago I pulled the trigger and bought an RPS stage 1 clutch but my OEM clutch was still strong so I have never taken it out the box. Now since the the newer and better RPS Billet Twin Disc Carbon Clutch is available, I need someone to take the stage 1 off my hands so I can purchase the RPS Billet Twin Disc Carbon Clutch from you! As a RPS distributor can you help me with my dilemma?
 
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Mac Attack said:
Just to get a comparison, did you previously use the Exedy single or dual disc, carbon or mettalic?

Without driving any of these, I'm trying to make up my mind on the RPS carbon, the Exedy dual carbon, or the Carbonetics dual carbon.

Billy - it appears you used to be sponsored by Exedy but now by RPS. Without reference to driveability, noise, etc, how has the RPS held up to your power levels compared to the Exedy? I'm concerned about the RPS's organic liner being a weak link.

Thanks,

Dave
Click to expand...
Yes we were sponsored by Exedy and ran their Twin Disc carbon clutch before the RPS twin disc.

Holding Capacity:

 The Exedy Twin Disc Carbon was a great clutch and handled up to 600whp flawlessly. As the power surpassed that mark by a few hundred hp, the clutch slipped and spun for the first lap or two when cold. Once hot, the friction levels increased and the Exedy handled any power level we threw at it. The RPS clutch didn't slip when hot or cold.

Your concern about the holding capacity of the RPS organic liner is well-founded. Truthfully it was the biggest question mark in my mind as well. After racing it for an entire year at a higher power level and demanding environment than anyone will ever put through it, you can be at ease in knowing that the RPS clutch worked flawlessly and is more than capable.

Engagement:

 My biggest problem with the Exedy was the 'chatter' which was pronounced when leaving from a stand-still. Once rolling, the clutch engaged with assertiveness but did not chatter. Exedy fixed this by treating the metal plates which eliminated the chatter. I forget what they did but we WPC-TREATED the metal plates/flywheel on an older twin disc design and it greatly reduced this chatter and improved the engagement characteristics of the clutch. I'm now running the old exedy twin carbon on my street car.

www.wpctreatment.com

The RPS has minimal to ZERO chatter and similar if not better modulation than the treated/newer Exedy. As a whole, I would probably say the RPS has less chatter and better modulation than the newer Exedy. This is splitting hairs because the treated Exedy is quite good and I am very pleased with the one on my car.

I have had feedback from some NSX owners when sitting in my personal car that the Exedy carbon clutch is 'much' heavier/harder to press than stock. While this feedback is very subjective to what each individual find as 'acceptable', I disagree that it's 'much' heavier especially since the Exedy Twin Disc Carbon is far lighter than the single disc RPS or ATS clutched cars ive driven. This heavy pressure plate/single clutch design is also much harder on the crank and thrust bearings inside the motor. The pedal effort between the RPS and Exedy is very similar with the RPS being on the lighter side of the two (slightly closer to OEM). Both of these twin disc/lighter pressure plate design is much easier on the crank/thrust bearings.

In Conclusion:

You can't go wrong with either the Exedy (newer) or RPS Twin Disc Carbon clutches. If you happen to have 800whp+, 330 width slicks (that grip and tax the clutch rather than break-away and spin), and race the car with the Exedy Twin Carbon, a warm-up lap or two to put heat into the clutch is all you need and it will work flawlessly.

Since the performance is so close, with the RPS barely edging out the Exedy IMO, the RPS' price point makes it the clear winner here.


Side Note: I was not a fan of the Exedy twin cerametallic clutch. The modulation was extremely difficult, and shifting (both up and down) resulted in an abusive/agressive clutch engagment. While it had a higher holding capacity, I felt it was causing excessive stress and damage on the drivetrain, plus it was harder to drive. I would only recommend this clutch if you have a sequential transmission and don't use the clutch atall and want a higher holding capacity.

HUNTJAMES said:
Sixteen months ago I pulled the trigger and bought an RPS stage 1 clutch but my OEM clutch was still strong so I have never taken it out the box. Now since the the newer and better RPS Billet Twin Disc Carbon Clutch is available, I need someone to take the stage 1 off my hands so I can purchase the RPS Billet Twin Disc Carbon Clutch from you! As a RPS distributor can you help me with my dilemma?
Click to expand...
Unfortunately I can't take ownership of your Stage 1. Have you listed it for sale under the 'parts' section of Prime?

Are you looking for the lighter pedal and increased performance of the Twin Disc Carbon? Are you FI or tracking your car? The stage 1 might be more than enough for your application.


Billy
 
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Oh, there is one CON I remembered after driving it today. When the clutch is depressed, it does make a slight whirling sound. It's like that aspirator whirling noise but a bit louder. It's not that loud, in that you won't hear it once you start moving (the engine and road noise will drown it out). However, at idle you will hear it. It's a tiny bit annoying in that you don't expect to actually hear a clutch, but it's a tiny price to pay in relation to all of the other benefits of the clutch.
 
Vega$ NSX said:
Oh, there is one CON I remembered after driving it today. When the clutch is depressed, it does make a slight whirling sound. It's like that aspirator whirling noise but a bit louder. It's not that loud, in that you won't hear it once you start moving (the engine and road noise will drown it out). However, at idle you will hear it. It's a tiny bit annoying in that you don't expect to actually hear a clutch, but it's a tiny price to pay in relation to all of the other benefits of the clutch.
Click to expand...
I forgot to touch on this in my last post.

The noise of the RPS clutch is about 1/20th the noise the Exedy Twin Disc Carbon clutch makes when depressed. The Exedy's 'rattling/clanking' around is almost attention-capturing, while the RPS is only lightly noticeable from inside the car. Since it only happens when the clutch is depressed (briefly before engaging 1st gear), I personally am find living with it, but it is quite loud. The RPS is far more liveable in this regard, but the tolerance of this kind of noise is very subjective.

Billy
 
Hi,

as you compare both Twin Carbons from Exedy and RPS, can you also give us their weights, so we can know what wheight savings can we expect between themselfs and to OEM NA1 91-96 and NA2 97-05 ??

I know that the Exedy is one of the most light kits available for NSX (more only perhaps the Tilton's), but i don't know where RPS's fit in this matter...

EDIT:

the RPS info is on the first post...sorry for misreading it...
after a search i can come up with:

RPS weight = 26.5lbs = 12Kg
Exedy weight = 16.1lbs = 7.3Kg (don't know if it's with or without flywheel)
OEM single = 43.9lbs = 19.9Kg
OEM Twin = 35.7lbs = 16.19Kg

man...the Exedy one is light.... as i have a OEM Twin one, the weight savings difference upgrading
to exedy would be hugely higher than with the RPS: 9.2lbs/4.17Kg (RPS) vs 19.6lbs/8.8Kg (Exedy)

and as it is unsprung weight saved, it would make a huge difference in overall performance.

for this to be accurate, i would only need to know if the Exedy's weight is with or without flywheel



Thanks,
Nuno
 
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I was actually looking into getting this clutch for my car, as my unknown aftermarket brand still survived after all these years... I still can't figure out what i have. (light pedal effort, but relatively fast engagement.)

but then now I learnt first-hand from Billy this clutch is on the FXMD car... and Vega$nsx 500+whp turbo; why am I dropping this in my light modified, stock engine nsx??

Any other reason I should consider this over the SOS ones?
What should I do....??
 
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