Apr 05, 2012

New clutch available soon?

Our weblog hunter "R2D2" has infiltrated the clutch department to bring us the latest undergoing secret development update...secret

He was able to capture some images during his infiltration, and it seems Mr. Y was secretly working on a new clutch development:


It looks nothing like any clutches that we have in our line-up, but it must be our original since it uses Alumite treatment and there was no name / logo on the cover.

Just by looking at it, the clutch seems to be a pull-type...


While he was trying to obtain more information from Mr. Y, Big-Boss has joined Mr. Y and started a little technical discussion about the clutch, and so it was time for R2D2 to escape... runsweat01

All he knows is that it is a pull-type clutch for Non-Japanese vehicles.  (Could it be for RR drive-train models...)

Let us hope that R2D2 will bring us more updates soon. wink

Apr 04, 2012

Super Lock LSD for Scion FR-S and Subaru BRZ

We are proudly introducing the latest addition to our LSD line-up, "Super Lock LSD for FR-S and BRZ".new  It is designed specifically for FR-S and BRZ to unleash the vehicles' true potentials.

With the help of GReddy USA, we were able to test our LSD at the Laguna Seca Raceway to determine the best setting possible for FR-S and BRZ.

These photos are taken during our test at the famous Laguna Seca Raceway.


Super Lock LSD will make FR-S and BRZ complete.  Developed with the pursuit of "Excitement", "Speed", and "Comfort" in mind, it will bring out the best of both vehicles without sacrificing everyday drivability.good

Order yours today!smile

Feb 27, 2012

"Nostalgic 2 days" in Yokohama

Hello ALLhappy01

We have just attended the Nostalgic 2 days event at the Pacifico Yokohama convention center through Feb. 25th to 26th.

Why were we there for?  Well, we thought it was the perfect event to publicaly announce and to celebrate the revival of our legendary TC24 enginewink
It's time for the nostalgia trip down to our memory lane...

Here's the image of our booth at the event. (The new TC24-B1 was installed to the white S30 Z shown in the above pic)

The event was a great success, and people couldn't take their eyes off of the TC24-B1 engine.



As you may already know, there were only 9 original TC24 engines ever builtsweat01
It took us over 30 years to revive this legendary engine, and now it is time for those  who have dreamed of owning it to make your dream come truesmile

Silver wolf, our boss and a creator of the TC-24, has made his appearance to personally meet everyone came to our booth, and has shared the revival story.

There was a parade of selected vehicles, and of course, our white Z was chosen to let the people hear the beautiful sound of the TC24-B1good

Here are few pics of our dealers here in Japan:


Dec 16, 2011

A championship car in South America

Congratulations to Speedaddicted,

One of our dealers in South America has won the Central American GT3 Championshipsign01

The vehicle competed in this championship was 1997 Toyota Starlet Glanza V with 4EFTE turbo engine, equipped with an OS Giken twin plate clutch kit and a SuperLock LSD.

The last race was held at Autodromo La Guacima in Costa Rica under shifty weather conditions.  But they were able to complete the race and won the championship for the 2011 season.scissors happy01


Dec 14, 2011

LSD for Porsche

Recently, we are receiving many inquiries regarding LSD's for Porsche models.


I could proudly say that OS Giken makes great products, but is not so great at promoting them... there are many products that are not publicaly announced but existed for awhile.danger

Please accept our sincere apology for not updating our product list fast enough.
(Tell you the truth, non of us could keep up...) coldsweats02

You can contact our authorized distributors near you for any product details even you don't see one for your vehicle.  You will be amazed to find what we offer.

Anyhow, we are currently expanding the LSD lineup for Porsche models.

We have confirmed the fitment of our LSD to the following models:
-930 with 915 transmission (G50 for 930 turbo)
-Post964 models with G50 transmission(includes 993 & 996)
-996 & 997 turbo
-997 Carrera
-Cayman S & Cayman 6spd.
-944 & 968 

The current best seller is LSD's for Cayman.shine

Here's an installation picture of our LSD to a Cayman diff. carrier / transmission case.camera


Cayman has MR (mid engine, rear wheel drive) layout where as 911 has RR (rear engine, rear wheel drive) layout, so the Cayman transmission case is facing the opposite direction compare to 911.

As far as the layout goes (front of the car to the back):
Cayman: Engine → Clutch → Differential → Transmission
911: Transmission → Differential → Clutch → Engine

Here's a picture of a clutch from Cayman.camera


Cayman has push-type clutch where as 911 has pull-type clutch.

Interesting to know, eh?smile

Dec 13, 2011

Evolution X L.S.D.

Tommy has a new update for us.smile

One of the teams participates in the Super Taikyu (endurance race) came to us for the LSD development for their Mitsubishi Lancer Evolution X.
It wasn't a simple task, but our Tommy loves a challenge...

So he built one.good


The team has requested us to build just a front differential that will fit into the RALLIART outer case.


Here's a comparison of the RALLIART and OS Giken front case.
One on the right is the OS made.



There will be 24 larger disks in the LSD to achieve the maximum disc capacity.


Since Tommy has built thus far, why don't we make it available for all the Evo X owners.flair 
So he has designed OS made outer case, and redesigned the front LSD to hold much larger disks to further enhance its performance and durability.


We have installed the LSD to our test car, and it is currently testing for its performance and quality control.

If all goes well, it shouldn't take too long to be added to our product list for you to get your hands on it.car dash

Dec 12, 2011

Time has come

Hello everyone,

Mr. RS has another update for the progress of the new Alfa CRGK.
(you can read the previous updates by clicking on Close Ratio Gear Kit in Categories)book

It seems that he has worked all night for countless nights (taking nice long naps instead...coldsweats01) to complete the prototype model.


It's time for us to send this baby to a new home for all the testing to come.weep


It was such a rough road for the development of this CRGK.

However, Mr. RS is very pleased of his work and satisfied of how it turned out.


It will be sometime before the final production.

We are all crossing our fingers for the best outcome.

If all goes well, then you might see this baby on the market sooner than you think.


For now, it is time for Mr. RS to move on to a new development project, or simply assemble more OS-88 for those who's waiting for their own.good

Dec 03, 2011

A supplementary history class

Thank you all for attending our history class. (Those who haven't, the class is still in session.  Don't make a teacher wait.) smile

It seems many of you are curious about our very first product sold to the public "TC-16" engine.  So we have decided to provide just a little bit more information to satisfy your curiosity.

TC-16 used Nissan L4 cylinder block, and was originally build for Nissan Sunny 110 (Datsun 110).  The engine was also fitted to Nissan Bluebird 1800SSS (Datsun 510), and should be compatible with other L4 engine equipped Nissan models...

Here's comparison table:

  • L18 (4 cylinder): displacement - 1770cc, 115hp/6000rpm, 112lb-ft/4000rpm
  • L20: (6 cylinder): displacement - 1998cc, 130hp/6000rpm, 123lb-ft/4000rpm
  • TC-16 MA2: displacement - 1888cc, 232hp/8500rpm, 150lb-ft/6800rpm Rev limit @ 10,000rpm

FYI, our LSD technician Tommy has revived the TC16 years ago, and it stunned everyone at Historic Automobile Festival in Twin Ring Motegi circuit where a beastly Nissan S30 Z with 2.9L Nissan-Works engine couldn't even pass this 510 sign03


If you want to see this little beast in action, please check the link below.
(The page is all in Japanese, but you can click on links found with each picture to see associated videos.)


On the same note, we are reviving the legendary TC-24 engine as we speak.
First come first served, so order yours now good

Nov 29, 2011

Alfa Romeo 105 type CRGK update

On our last entry, we have informed you that the new CRGK for 105 type Alfa Romeo is in development.

It seems our CRGK / Transmission specialist Mr. RS has made some progress since then, and here's the latest update.new


If you are familiar with Alfa cars, then you should know what this is...

Yep, it's a prototype Shift-fork (Selector fork).good

More than 50 years have past since the original transmission was introduced, we are trying to revive it by using better materials and applying the modern technology.


A bracket is also in development along with the shaft. This CRGK will have a shorter shift stroke compare to the original one.

It might take a while before we see the complete kit since Mr. RS is quite a busy man.  But sure to inform you with more updates in the near future.

Don't forget to check back the weblog as often as possible.wink

OS Giken history class

For today's class, let us go back in time to learn how OS Giken started.
(Don't worry, I'll make it brief to avoid any tears of boredom...)coldsweats01

Although OS Giken is mostly known for the performance clutches and LSD's by many, it made its name by developing its original DOHC 4-cylinder 4-valve race engine in 1971.  As a matter of fact, our very first product sold to the public was this race engine.


In 1981, the legendary DOHC L6 24-valve engine "TC24-B1" was created.  We actually had a press conference to advertise the engine, and this was unheard of at the time for an aftermarket parts manufacture to have a promotion in this scale.   


This photo was taken 30 years ago.  You could see the Big-Boss himself talking to the press in the center of the photo.camera


Here it gets interesting.  TC-24 was an amazing engine, however, no clutch could transmit its power to the transmission at the time... so we developed performance clutches to take care of the problem by ourselves. 


Now that we have the clutch to transmit its power to the transmission, next step was to transfer the power to the wheels... so we developed SuperLock L.S.D. to take care of that problem.


The rest could say the same for our other products, and all was started with the TC engine and for TC engine. 

All Hail The TC-24paper

Nov 25, 2011

TOYOTA GAZOO Racing Festival 2011

Hello Everyonehappy01

Just to let you all know that OS Giken will be at the Toyota Gazoo Racing Festival 2011 in Fuji Speedway Nov. 27th.


Since the event is mainly for Toyota vehicles, we'll have clutches and LSD's for many of Toyota models.

There will be our LSD demo vehicle for those who would like to experience the performance of OS Giken LSD in person:


We'll also sell some items at the Festival price, so please come join us at the Fuji Speedway this Sundaysign03  if you happen to be in Japan that is...

Nov 22, 2011

A victory at the Honda Challenge

Great news came in from the states side.ear

One of our racers won the Honda Challenge National Championship race 2 years in a row by using OS Giken LSD.good


You can check more images of the most recent magazine coverages and Hi-Resolution pictures in the links below.

Also, the 2011 HPD Honda Challenge National Championship race will be nationally televised Tuesday, November 29, 2011 on the VERSUS channel. 
Let's watch our sponsored team take the checkered flag with the OS Giken decals for all of us to see.smile

Click below for the 2011 HPD Honda Challenge National Championship Race Webcast: (soon to air on VERSUS, Tuesday, Nov 29th, 2:30pm)

Click below for Meris Motorsports' September 2011 Honda Tuning Magazine feature:

Click below for the 2010 HPD Honda Challenge National Championship VERSUS TV video recap (scroll to mid-page):

For an "Up Close and Personal" video interview with Jonathan Meris and the Meris Motorsports team:

Nov 16, 2011

In stock now!

Good news from our transmission division.notes

Mr. S informed us that long waited out of stock parts have finally arrived.


Here they are, Slider (Dog ring) and Shift fork (Selector) for OS-88 Sequential Transmission.

They are expendable items, however, somewhat difficult to mass-produce.
As a result, we always have a limited supply of these items in stock, and limiting how many OS-88 unit our technician could assemble.

Come to think of it, it has been 9 years since OS-88 was first introduced.
We have sold over a couple hundred units thus far, and now many units are requiring overhauls and are taking parts away from new units to be assembled...

Mr. S aplogizes for letting many of you wait for your own OS-88.think

He'll do his best to send them in your way ASAP.
If you haven't order yours yet, then you should do it at your earliest convenience 'cause it is first come first servesign01

Nov 15, 2011

Mercedes-Benz Mclaren SLR

Hello everyone, this is T writing.happy01

OS Giken has LSD's available for many of Mercedes models, however, has never crossed our minds to have one available for such a rare model... Mclaren SLR until one of our customer requested for his own.


A rear member (picture above) looked to be made out of a duralumin material, and many parts are attached to the rear member.

I have taken its differential apart for its measurement, and was shocked to find out that they use an open differential.coldsweats02  It is true that the vehicle is equipped with a Brake LSD, so they might thought that there is no need for a mechanical LSD... but I personally believe a super car like Mclaren SLR needs a high-performance LSD.


OEM differential (left) and our LSD (right) are shown in the picture above.

I have tested and found that there is a tendency for many of high powered FR vehicles to lose traction on right rear wheel first when accelerating from a stop.  When it happens, the traction control system will kick in.  For Mclaren SLR, the brake LSD will kick in first to control the wheel spin, and then the traction control will control the throttle.  This is good for the safety, but not so good for... car dash


With our TCD installed, the vehicle could send all of its engine power/torque to the ground, and could take off without the interference of its traction control.  It also improves high speed stability.

I highly recommend our LSD for all the high powered vehicles, but not recommend anyone to be a speed demon... bleah

Drive safely.

Nov 05, 2011

Ferrari 550 Maranello LSD

Hello everyone, this is Mr. T from OS Giken LSD lab.

A customer has requested to build a custom LSD for the 550 Maranello awhile back.
It sparked my interest due to its original design, so I built one without considering its cost...moneybag

OEM differential has such an unique design that it bolts onto a carrier by placing an external ring gear in between.


Above picture is the custom made LSD for the 550 Maranello.
OEM differential was designed to attach an external ring gear, so I also designed the ring gear (see picture below) for the custom LSD.


Here's an installation picture.  The customer was 120% satisfied with the custom LSD's performance for greatly improved traction.
This 550 was equipped with twin-turbo V12 engine.


It seems many owners are experiencing similar traction problems since I have recieved more orders than I have anticipated...bearing