[Justin@ADVAN Performance]

Hey Gents,

here our a few pics of the multi-plate clutch we have developed for our N54 135i.

It utilises an OS Giken "TR2CD" twin-plate basket that features 215 mm sprung hub friction plates, with clutch spines that are suitable for the 26 spline 35 mm input shaft of our ZF gearboxes.

We just have to get "Ross" to knock up a suitable N54 chromoly steel "6 bolt" flywheel, then in she goes.

OS Giken rate this particular twin-plate in the 650-700 engine horsepower range and they are known to be conservative with their estimates.

It's a bit if a shame that once it's installed into the car, you will never see the OS multi-plate again, as it really is a beautifully manufactured component.

Cheers,

JD.

[vasillalov]

Now THAT looks pretty good! OS Giken make some quality stuff! My next purchase would be TCD Diff from them.

[farbmw]

Do you have pricing on this bad boy?

[kenneth]

Wow! Nice looking, but I have a noob question. Why so many nuts and bolts. I count 36. What's their purpose and is there any concern for any of them to unscrew?

Thanks!

[XPO186]

Sweet... I hope this ends up being an affordable multi/twin disk setup for these cars.

What is the friction material on those disks?

[Dieselmd]

OS Giken is pricey but their quality is phenominal.

[dyezak]

Eh... Multi-clutch setups make my stomach turn. If you have ever owned a multi clutch setup you would understand. They hold the power, and the engagement can be smooth with the proper build (sprung hub). And it looks like OS Ginken did that. But ALL multi clutch setups have an annoying noise while sitting with the clutch depressed (think sitting at a stoplight). Imagine your wastegate rattle...that's a little 1" disk bouncing around rattling...basically two quarters in a coffee can. Now think of two 8" disks doing the same thing, bouncing around and rattling in the clutch basket between the separator plates.

Anyone who claims that a multiplate clutch doesn't make this sound is either ignorant (never used one (I've used 3)), or is a salesman, or is both.

These are designed as racing clutches and they do their jobs fantastically, but using them on street cars leads to regret on a daily driver....

[Former_Boosted_IS]

Originally Posted by dyezak

Eh... Multi-clutch setups make my stomach turn. If you have ever owned a multi clutch setup you would understand. They hold the power, and the engagement can be smooth with the proper build (sprung hub). And it looks like OS Ginken did that. But ALL multi clutch setups have an annoying noise while sitting with the clutch depressed (think sitting at a stoplight). Imagine your wastegate rattle...that's a little 1" disk bouncing around rattling...basically two quarters in a coffee can. Now think of two 8" disks doing the same thing, bouncing around and rattling in the clutch basket between the separator plates.

Anyone who claims that a multiplate clutch doesn't make this sound is either ignorant (never used one (I've used 3)), or is a salesman, or is both.

These are designed as racing clutches and they do their jobs fantastically, but using them on street cars leads to regret on a daily driver....

Honestly, I have a CM twin disc and don't have this issue. In fact, I have posted sound clips online. I have been driving manuals and high hp vehicles for a while, so I am not a noob.

[dyezak]

Originally Posted by Former_Boosted_IS

Honestly, I have a CM twin disc and don't have this issue. In fact, I have posted sound clips online. I have been driving manuals and high hp vehicles for a while, so I am not a noob.

CM twin I had in my Evo was horrible. Exedy was better, and HKS was good, but all of them sounded like shit. And it's hard to get more driveline noise than an Evo with Front, Mid and Rear LSD's all groaning around turns...

[Former_Boosted_IS]

Originally Posted by dyezak

CM twin I had in my Evo was horrible. Exedy was better, and HKS was good, but all of them sounded like shit. And it's hard to get more driveline noise than an Evo with Front, Mid and Rear LSD's all groaning around turns...

Like I said, it is not an issue on my car. The flywheel is what is noisy on this car. The DMF is there for a reason and it is not performance on BMWs.

[MikeB@fftec]

Originally Posted by kenneth

Wow! Nice looking, but I have a noob question. Why so many nuts and bolts. I count 36. What's their purpose and is there any concern for any of them to unscrew?

Thanks!

The inner screws hold the "fingers" to the clutch cover, and the outer set hold the clutch cover to the basket.

As far as multiplate clutches go, they will all typically make some noise with the pedal depressed. The rattling is caused by the intermediate plate and friction disks moving around since there is no pressure holding them together.

[JamesM3M5]

I've used OS Giken super singles and doubles in racecars only. Yes, they are unfortunately very noisy when you push the clutch pedal down in neutral. There is no good way to avoid that. But if you are looking for a high quality clutch that doesn't fall apart inside under hard race use, they are an excellent choice.

[Velocity26]

Porsche actually has the intermediate plate "spring loaded" to where it slightly separates from the front disk and reduces the drag while eliminating the plate rattle. The issue there is that the disk hubs are a harder material than the shaft, and the hubs eventually wear into the shaft and do not slide freely. You are forced to replace the shafts periodically to keep the disks from locking and dragging.

[Justin@ADVAN Performance]

Originally Posted by vasillalov

Now THAT looks pretty good! OS Giken make some quality stuff! My next purchase would be TCD Diff from them.

Cheers mate, the "TR2CD" unit looks very sexy in the flesh. OS Giken like many of the Japanese performance manufactures make their products to exceptionally high standards.

Originally Posted by farbmw

Do you have pricing on this bad boy?

I know what the twin-plate basket cost us, but we will have to wait for the completion of the flywheel before we can confirm a retail figure.

Originally Posted by kenneth

Wow! Nice looking, but I have a noob question. Why so many nuts and bolts. I count 36. What's their purpose and is there any concern for any of them to unscrew?

Thanks!

Haha, yes it really is a nice looking bit of kit from OS.

Their flywheels are just as sexy, but to have them do a one-off for the N54 would have cost more than double, what the "Ross" flywheel would have been worth to us.

The many "nuts and bolts" you see are all made from high tensile steel and they ain't about to come loose.

Multi-plate clutches are subject to a lot heat, the many fasteners you see ensure the diaphragm within pressure plate and the cover itself is secured to the basket, in such a way to prevent warpage of the components, as a result of heat generated within the clutch system.

Originally Posted by XPO186

Sweet... I hope this ends up being an affordable multi/twin disk setup for these cars.

What is the friction material on those disks?

Hey Phil,

I thought you would like the pics, but I am afraid you may not like the final price.

Unfortunately the "TR2CD" basket ended up costing us more than I originally thought.

The friction plate material is a carefully selected heat treated metal alloy, whose exact composition is unknown.

Originally Posted by Dieselmd

OS Giken is pricey but their quality is phenominal.

The OS Giken multi-plate clutch range is certainly not one of the cheaper alternatives available.

However all of the clutch components are made from the highest quality materials and even under extreme conditions, their durability has proven to be second to none.

Cheers,

JD.

[JamesM3M5]

Originally Posted by Justin@ADVAN Performance

However all of the clutch components are made from the highest quality materials and even under extreme conditions, their durability has proven to be second to none.

Cheers,

JD.

Definitely true. We had one customer lose her race weekend because a different brand racing clutch/FW combo came apart at the flywheel friction surface. It bound up, and the clutch wouldn't disengage. That really sucks when you tow 6-10 hours away, pay hundreds/thousands in fuel, hotels, and race entry fees to have that kind of problem.

[Justin@ADVAN Performance]

Originally Posted by MikeB@fftec

The inner screws hold the "fingers" to the clutch cover, and the outer set hold the clutch cover to the basket.

As far as multiplate clutches go, they will all typically make some noise with the pedal depressed. The rattling is caused by the intermediate plate and friction disks moving around since there is no pressure holding them together.

Originally Posted by JamesM3M5

I've used OS Giken super singles and doubles in racecars only. Yes, they are unfortunately very noisy when you push the clutch pedal down in neutral. There is no good way to avoid that. But if you are looking for a high quality clutch that doesn't fall apart inside under hard race use, they are an excellent choice.

Hey guys,

the noise you will hear when the clutch pedal is depressed with an OS, is the centre/intermediate plates(s) vibrating against the cover posts of the basket.

FYI,

many other multi-plate clutches from other companies do not utilize the same strengthening processes during manufacturing as OS Giken, this can lead to increased material degradation over time.

As a result the the clutch noise or rattle will often become louder over time, as wear on the centre plate(s) & posts develop more free-play within the basket.

The OS Giken multi-plate design, in conjunction with the use of the most suitable materials and exacting manufacturing processes, will minimize any system degradation to ensure and the clutch continues to sound the same, as when it was first installed.

Peter just installed a bad ass "R3C" triple-plate clutch into a R33 GT-R, I have driven the car briefly and also had a good listen to the signature OS multi-plate "rattle" and it really is not that bad.

I suspect most single mass flywheel's on the N54, will generate more noise at idle than an OS multi.

Cheers,

JD.

[Justin@ADVAN Performance]

Originally Posted by JamesM3M5

Definitely true. We had one customer lose her race weekend because a different brand racing clutch/FW combo came apart at the flywheel friction surface. It bound up, and the clutch wouldn't disengage. That really sucks when you tow 6-10 hours away, pay hundreds/thousands in fuel, hotels, and race entry fees to have that kind of problem.

Hey James,

yep that is certainly a shitty scenario.

After welding a certain "Feramic" Stage 2 clutch to our chromoly steel flywheel at consecutive drag meets, Peter was done with using a single face clutch at the strip whilst running on Hoosier drag radials.

After having to R & R the gearbox 3 times in as many weeks, he was somewhat unimpressed to say the least, haha.

Hence our decision to a develop a multi-plate clutch for the N54, based on a proven product from OS Giken.

This will be the third and I'm quite confident final, aftermarket clutch kit that install in my 135i.

Here are a few pics of the "R3C" triple-plate that we just installed into a customer's R33.

This bad boy will handle 1,200 + engine horsepower, it's overkill for Sean's R33 as it only makes 540 rwhp on a DynoDynamics dyno, but the "R2CD" twin-plate that would have been ideal, was not available for the R34 gearbox that is in his car.

The final pic showing the dismantled "R3C" clutch assembly was "borrowed" from another website, as Peter had already installed the clutch before I had a chance to pull it down for a few pics.

Cheers,

JD.

[Justin@ADVAN Performance]

Hey guys,

we may have our new N54 chromoly steel flywheel, that will be designed for use with our OS Giken twin-plate completed in a few weeks.

If so I will post up pics and retail pricing on the completed clutch/flywheel kit too.

Cheers,

JD.

[Justin@ADVAN Performance]

Hey Gents,

so here we have the completed flywheel that is compatible with our OS Giken "TR2CD" twin-plate clutch.

As with our previous 10 kg & 7.5 kg "Single Mass Steel" flywheels, the top hat driven plate section that also secures the twin-plate basket is machined from chromoly steel, that is subsequently nitrided and in doing so further increases its durability.

The ring-gear section that is secured with 12 countersunk high-tensile steel bolts is machined from 6061 billet aluminium.

We could have also made it from chromoly steel, but given that there is no real concern regarding durability the use of 6061 aluminium decreases the machining time required and lessons the reciprocating mass somewhat.

The OE starter motor ring-gear is retained and press fitted by the same method employed by BMW.

We will shortly be pulling the gearbox out of our 135i yet again , to install this bad boy clutch/flywheel setup and hopefully we will finally see the 1/4 mile times, that the vehicle is capable of.

Cheers,

JD.

[Lulz_M3]

Looks great! What does the whole setup cost?

[Justin@ADVAN Performance]

Originally Posted by Lulz_M3

Looks great! What does the whole setup cost?

Thanks mate.

Truth be told it has cost me more than I originally expected.

We have not set a retail price as yet, because we are not really expecting to sell these kits, as our cost price alone was well over $2,000.

An OS Giken twin-plate clutch kit, to the best of our knowledge has never been installed into a N54 vehicle.

I just wanted to illustrate that we at Advan performance are capable of fabricating pretty much anything for the N54/N55 platform, but unfortunately such one-off custom work does come at a price.

I was also over all the headaches associated with drag racing a high horsepower vehicle, on a small single plate clutch, this kit will fix that problem for my car.

If anyone is serious about purchasing our OS Giken twin-plate setup, please PM and I can quote you a price inclusive of shipping.

Cheers,

JD.

[cleex024]

Update?