LSD

Sunday,

starting a day with a mechi-katsu sandwich, a clam chowder, and a ice coffee from MamMoth Bakery inside the Redondo Marukai 🙂

一日を始めるために、レドンド沿いのマルカイ内にあるマンモスベーカリーよりメンチカツサンド、クラムチャウダー、そしてアイスコーヒーをゲット 🙂

MamMoth Bakery

1620 W Redondo Beach Blvd

Gardena, CA 90247

310.538.5594

and now on the 2 freeway, heading to Chevy Chase Dr. in Glendale. why? cuz i got the OS Giken LSD installed 🙂 take it out for a drive.

そして、高速道路の2号線に乗って、グレンデールにあるチェビーチェイス・ドライブに向かってます。なんでって?OS技研のデフが入ったからこれから試運転も兼ねて峠で遊んでくるとこッス 🙂

arrived at Chevy Chase Dr.

チェビーチェイス・ドライブに到着です。

and here i go!!

っしゃ、行くぜっ!!

poooooooowerrrrrrrrrrr shiiiiiiiiiiiiiiiiftttttttt!!! lol

ぱぁぁぁあわあああぁぁぁぁぁシィィッフゥゥットォォォォォォオ!!笑

gotta watch out for deers,

鹿に気つけて、

and horse-riders.

それと、乗馬してる人達。

cigarette break on the side 🙂 lots of people were here i guess… lotta skid doughnut marks.

横でタバコ休憩 🙂 結構人が溜まってたんだろうね…定常円かましたタイヤマークがイッパイ。

went to go get some gas now, changed my camera settings to Tv. and Rd. 2!!

ガソリン入れてぇ、カメラの設定もシャッター優先にして。いざ、2ラウンドめへっ!!

poooooooowerrrrrrrrrrr shiiiiiiiiiiiiiiiiftttttttt!!! again, lol

ぱぁぁぁあわあああぁぁぁぁぁシィィッフゥゥットォォォォォォオ!!また(笑

i hate this turn… arghhh

ここのコーナー嫌い…あうぅぅ

hahahha i look so fast… lol thanks to the OS Giken LSD, the car feels much more fun 🙂 unlike the other LSDs, the locking is smooth. the car will have its head inward and turns with the accel pedal control. i will something more detailed soon.

ウケる、俺超速そうじゃん…笑。OSのデフに感謝ですねぇ。車が全然楽しくなったよ 🙂 他のデフと違ってロックがガツンって効かないからいいね。車はアクセルのコントロールで頭入る感じになってきたし。もっと細かい事はそのウチ書きます。

on the way back, found a dog sticking his head out from the window.

帰り際に、窓から頭出してる犬が居た。

a fun Sunday it was.

楽しかった日曜日。

 

OS Giken Review

here is a quick email from OS Giken a while back.

 

If you have a chance, please check out the Feb. 09 issue of Grassroots Motorsports. An article concerning differentials is in there, comparing performance of the OS SuperLock, Kaaz, and the stock Torsen on an S2000. Needless to say, the SuperLock outperformed the competition and was the editors’ favorite of the 3.

Some highlights of the article:

“Essentially, the OS Giken provided the best of the two other differentials…”

“…he posted the fastest lap of the day when running the OS Giken…”

“Its very progressive lockup was just what our duo desired.”

 

Some things about the OS SuperLock that are not mentioned in the article:

          no break-in period required

          no need for rebuilds (with regular maintenance)

          as smooth as an open diff at low speed (no diff chatter), but still able to lock up to 100% under throttle

          no expense spared during manufacturing (raw-forged gears, heat-treated components, unique patented design)

OS Giken Limited Slip Differential

so why choose a OS Giken LSD? well, lets take a look at the picture below first.

なぜOS技研のデフを選ぶか?まずは下の写真を見て見ましょう。

***Courtesy of OS Giken/OS Giken USA***

and here is a random LSD i found online. i had to crop the name off since i will be talking shmack about it… lol hahahha well, i will save the shmack talking for later. please take a look at the picture below.

そしてこれが適当に見つけたLSD。名前のとこを切り取らなきゃいけなかったッス。ナゼなら、ボロクソに言うと思うから…笑。まぁまたその話は後半にでもね。まずは見てください。

***Courtesy of Google Image Finder*** …lol

now do you see the difference? yes the number of the clutch plates, also known as the friction plates. OS Giken has twice the number of the plates inside the differential. and its springs in the pressure ring is to pull the two rings together unlike the others where it tries to keep it open as much as possible. with all the patent received mechanism, OS Giken’s LSD for lock 100%. below is the simple steps of how the OS Giken LSD works.

これで違いがわかりますでしょうか?そぅ、クラッチプレート(プレッシャープレートとも呼ばれてますね)の枚数が格段に多いです。2倍ぐらい入ってますね。それにプレッシャーリング内のスプリングが常に閉じようと引っ張っています。他社のスプリングは逆に押し広げている状態を維持しようとしています。そういった特別な機構(特許獲得済み)と拘りを持ったOS技研のデフは100%ロックします。下はLSDの簡単な動作です。

1.) the spring inside the pressure ring will switch from free to lock in split second.

2.) the drive force thats been flown from the engine to transmission will revolve the differential case, and at the same time, spins the pressure ring simultaneously.

3.) the pinion gears and the cross shaft will push open the pressure ring.

4.) the stretched open pressure ring will push out the pressure plates to lock.

5.) the pressure plate locks perfectly to rotate the side gear which is hot forged.

6.) the drive force will be transmitted to the drive shaft upon the rotation of the side gear. 

 

1.) プレッシャーリング内のスプリングがオープンとロックの状態を瞬時に切り替えます。

2.) エンジンからミッションを通って来た駆動力がデフケースを公転させてプレッシャーリングを回転させます。

3.) ピニオンと十字軸がプレッシャーリングを押し広げます。

4.) 広げられたプレッシャーリングがプレッシャープレートを押し広げてロックします。

5.) 確実にロックされたプレッシャープレートがサイドギア(熱間精密鍛造加工済み)を回転させます。

6.) 回転したサイドギアがドライブシャフトに駆動力を送ります。

one of the LSD out in the market is the same type as the OS Giken LSD since they use the OS LSD as for OEM. i’m not sure if they still do OEMs. i believe some people do know which company i am talking about. but still, the mechanism within the LSD is different. there is this one company that tried to make it like the OS Giken. not mentioning who though.. and this guys is the one i would like to bash on lol. here is how the story goes. one of the engineers went to this lawn mower factory in Okayama Japan with all the blue prints memorized (not completely though since he was doing minor works) and made a mock up of the differential. but of course the product was a complete fail. just kept on breaking. and yes they been doing more and more research. then one of te engineers have took all the tech info and started his own company. to fill in gaps of the quality, they used carbon fibers for clutches and differentials. not gonna mention who though… hahha this was long time ago. i bet some people do know about this pretty famous john dory in the industry. well, copy is only a copy even though they added their originality. they cannot copy the mechanism of their STSG (Spline Through Side Gear) and the LTCS (Lock Timing Control System). the number of the pressure plate and the diameter size is one and only from OS Giken. that is the reason why i recommend OS Giken LSD.

OSのデフと近い構造の物がマーケット内にあります。今はどうかわかりませんけど、以前はOSさんがOEMで卸していたので。知ってる人も多分多いでしょうねそのメーカーがどこなのか。でもやっぱ本物のOSの機構は違いますね。誰とは言いませんが一社似せようとした奴等が居ますねぇ。そこまで言いませんけどね(笑。話はこんな感じです。開発陣の一人が設計図を丸暗記して(完璧に覚えれなかった様ですねぇ)岡山県にある某芝刈り機の専門工場に駆け込んだらしいです。そこで似せたデフを作り始めたそうです。まぁ当たり前ですけど、失敗に終りました。それでも開発などを続けて行くウチに独立したそうです。技術の足りない部分は素材で補おうって事でカーボンを使用し始めたそうで。誰とは言いませんがねぇ…笑。もぅかなり昔の話らしいですよ。知ってる人も意外と多いでしょうねこの業界内はかなり狭いので。まぁ、所詮コピーはコピーです。OSの機構は簡単には真似出来ないでしょう。STSG(Spline Through Side Gear)やLTCS(Lock Timing Contorl System)とか。プレッシャープレートの枚数や直径の大きさはOSが群を抜いています。それが僕がOS技研をお勧めする理由です。