Rumors about the UUC Twin Disk Clutch setup are completely true...

[Rob Levinson]

.

... and we're looking for early adopter/field testers with big-power cars.

Not ready to ship immediately, but very soon.

Applications to be available:

E90/E92 M3 & 335i
E46 M3 / 3-series
E36 M3 / 3-series
E39 M5/540i
Z8
Z4 (all)
Z3 (all)

Sign up for the UUC Twin Disk mailing list, we will send out specs and pricing as released:

http://www.nexternal.com/uuc/Product702

[jonesmechanical]

Yes, how much, what are your expectations as far as drivability and power holding. I have had a fx700 now for about 1500 miles. Engagement short fast and rough. It definately holds the power, but is not what I would consider streetable. My wife could never even attempt to drive it, and she handles a clutch pretty good. Even friends with modded cars I have to warn them and if I tell them "whatever you think is a fast and hard engaging clutch, take that and multiply by 10, and be ready with the throttle when it does engage" that usually keeps a first time driver from stalling it.

600 ft lbs where I am at at the wheels.

The roads are bad around here currently, so I wouldn't do some good testing until the spring.

Let me know.

[WizeGi///M3]

If anyone is in the market for such a piece, I would jump on the offer. I have a prototype and it works great!

Dual Bronze discs right now. Going to try Dual Carbon discs when the car is up and running again.

[Rob Levinson]

Yes, how much, what are your expectations as far as drivability and power holding. I have had a fx700 now for about 1500 miles. Engagement short fast and rough. It definately holds the power, but is not what I would consider streetable. My wife could never even attempt to drive it, and she handles a clutch pretty good. Even friends with modded cars I have to warn them and if I tell them "whatever you think is a fast and hard engaging clutch, take that and multiply by 10, and be ready with the throttle when it does engage" that usually keeps a first time driver from stalling it.

Excellent questions and good points.

The reality is that engagement characteristics are only partially dependent on configuration, but are heavily dependent on material. Along the lines of our overwhelmingly successful segmented kevlar conventional-style clutch kits, a variation of that technology makes a Twin Disk setup similarly street-friendly.

Various materials will be offered, with differences in usage and power recommendations... again, as with our conventional clutch lineup.

As for pricing, I'll leave it at this; we intend to price it very aggressively.

- Rob

[PlayerN07]

Sign me up! I want to turn up the boost!

[card counter]

UUC and Rob top notch all the way

[ZHP]

So Rob, why should I be interested in buying a twin disc clutch? Can you discuss the advantages/disadvantages relative to a conventional clutch?

[turbo b]

So Rob, why should I be interested in buying a twin disc clutch? Can you disscuss the advantages/disadvantages relative to a conventional clutch?

^yeah what he said!!!^

[highboostingm3]

Ummmmm....you want my shipping address or what?

0-34psi through a t4 76gts turbo. Send it to me now!

I will do before/after videos showing the FX700 clunking along in comparison to your smooth as buttah twin disk.

The car has no sponsors but I am willing to negotiate.

[ravsm3]

What about a hpf stg2 with smg?

[jonesmechanical]

Ummmmm....you want my shipping address or what?

0-34psi through a t4 76gts turbo. Send it to me now!

I will do before/after videos showing the FX700 clunking along in comparison to your smooth as buttah twin disk.

The car has no sponsors but I am willing to negotiate.

Cam, you feel the same way I do about the fx700? When I did my research it seemed that it was a good option. I am ready for a streetable option, just don't want to pay multi thousands on something like mike r did, but then again I am not looking for a clutch that will hold 1500 hp and still drive great in traffic. Just for something that has the specs of the fx700, but more stock like in drivability.

[camshaft]

I saw the HKS twin plate actually uses a sprung hub center. I'm wondering if two segmented kevlar disks, a sprung hub center, and a steel flywheel could yield a streetable twin disk setup.

Austin

[xsport652]

So Rob, why should I be interested in buying a twin disc clutch? Can you discuss the advantages/disadvantages relative to a conventional clutch?

+1
just curious to learn about it

[highboostingm3]

Cam, you feel the same way I do about the fx700? When I did my research it seemed that it was a good option. I am ready for a streetable option, just don't want to pay multi thousands on something like mike r did, but then again I am not looking for a clutch that will hold 1500 hp and still drive great in traffic. Just for something that has the specs of the fx700, but more stock like in drivability.

Hey bud. Yeah it can be a little annoying in first. It's better now that I don't have a knife-edged crank but it could be smoother of course. It's the only one I know that holds the power it does. I definitely would keep it over spending any money on another one and I won't ever be spending $4k+ on a clutch. However, if I can get a smoother free one by testing it and videoing the results and maybe putting a sticker on my car at events, then hell yeah.

[LukeG]

it won't be free Cam, i'm sure they'll still want a hefty chunk

[GT110]

My engine is already out for a full rebuild and I will be replacing the clutch to cope with 500whp.

But its a euro.. can I join the beta-test-team?

[boosted 528]

Rob , for your new twin disk set up, would you have applications for the m52 engine? The reason i ask is, If the drivability and engagement is better than the fx700 then i might be interested

[LukeG]

it says e36 m3 AND 3 series. so i'd assume yes

[highboostingm3]

it won't be free Cam, i'm sure they'll still want a hefty chunk

Ah crap!

Rob , for your new twin disk set up, would you have applications for the m52 engine? The reason i ask is, If the drivability and engagement is better than the fx700 then i might be interested

Doesn't that engine use the same ZF tranny? So would be same clutch.

[Rob Levinson]

So Rob, why should I be interested in buying a twin disc clutch? Can you discuss the advantages/disadvantages relative to a conventional clutch?

There are several concepts involved as advantages for a twin disk setup:

- Power capacity
Multiple plates give that much more clutch contact area. It doesn't work out precisely as double because the inner diameter and outer diameter are not the same as the OE clutch, but the added surface area results in a multiplicity of the friction interface area.

Also, due to the completely different geometry of the specialty pressure plate, more clamp load can be applied without a significant change in pedal effort.

- Thermal capacity
Again, due to the increase in surface area, the same amount of heat energy is shared by more more surface, resulting in lower heat per area of surface, and of course that much more surface to dispel the heat.

- Lower MOI (Moment Of Inertia)
The smaller diameter clutch assembly results in more of the "virtual mass" loss, the primary performance benefit of a lightweight flywheel system. You can see how diameter, specifically mass positioning, affects MOI:
http://www.uucmotorwerks.com/flywhee...mass_calcs.pdf

- Stiffer cover assembly
Due to the smaller size and construction, less deformation of the pressure plate and cover assembly either from force or heat, resulting in better consistency across a range of operating conditions.

While we are going to extended efforts to introduce a truly streetable Twin Disk design, let there be no misunderstanding; this technology is not a replacement for conventional single-disk clutch design. If the application is an extremely high-powered car, or used in a situation that is hard on a clutch (drifting, for example, with the "clutch kick" technique), then the Twin Disk is a viable option.

What about a hpf stg2 with smg?

Good candidate.

Rob , for your new twin disk set up, would you have applications for the m52 engine? The reason i ask is, If the drivability and engagement is better than the fx700 then i might be interested

Absolutely... understand that BMWs truly are like Legos, many parts are interchangeable. For example, the exact same flywheel clutch setup, regardless of source, is interchangeable between any E36 5-speed or 6-speed, all Z3, and most E46 5-speed models. When we start to look at some of the different gearboxes (E46 M3, MZ4, E46 330/6, E46 325/5/2), the difference becomes just a matter of center spline and pilot bearing configuration. Even the newer E90/E92 gearboxes are possible candidates with more customized mounting and shifter hardware.

I love playing with gearbox swaps. Worked out one swap or another in almost all of my personal cars, and even one of my BMW bikes.

- Rob

[Nj85'325]

Anything for the Getrag 260?

[5mall5nail5]

Rob I am somewhat intersted - by somewhat I mean I am not sure of the pricing so I don't want to make a bigger noise than I can maintain. Do you think this package could hold the 1000 hp / 900 tq cars?

[Rob Levinson]

Anything for the Getrag 260?

Which version of the 260, used in which car?

Honestly, not high on the development list, but once we're fully geared up, a custom application is possible.

Rob I am somewhat intersted - by somewhat I mean I am not sure of the pricing so I don't want to make a bigger noise than I can maintain. Do you think this package could hold the 1000 hp / 900 tq cars?

We should have a package suitable for that power level. Can you share some details on the motor?

- Rob

[gerry_miranda]

Like the FX-700, does this come packaged with a flywheel?

[5mall5nail5]

We should have a package suitable for that power level. Can you share some details on the motor?

- Rob

Thinking far far ahead. My car right now has a ZF 310Z but might get a ZF 320Z in the near future. This is on bored and stroked M50, 76mm turbo, and direct port nitrous.