jwkim80

Hello.

I have heard that OS Giken LSD requires some machine work to make it fit into C63 differential.
Is this true?

Or does it fit into our differential housing without any modifications(just like Quaife LSD)?


TIA!

SALES@OETUNING

Yes, you are correct. The dif housing must be ground down in areas for fitment of OS Giken. An amazing road race dif. The Quaife QDF9V fits right in, no grinding needed. Great performance and cheaper.

Staff@RPM

Quaife is a lot easier and way more cost effective. We have been selling the Quaife for $950.00, you can't really beat that price.

chief63

If you want the best, go with OS Giken, if you want the best price, go with Quaife. Both are good but OS Giken is really the bomb!

dodger63

Please explain

Speedriven1

Any back-to-back comparos or lap times or 1/4 mile runs to quantify?

jwkim80

Yes, I am aware OS Giken(clutch type) LSD is far superior to Quaife(gear type), but I am NOT comfortable with grinding differential housing to make it fit.


Can anyone give me more details about where it needs to be machined?
Can this be easily done by local machine shop?
Sending the diff unit to Renntech is not my option since I live over-sea.

chief63

Here is a good article that explains how different the OS Giken is.

http://www.motoiq.com/MagazineArticl...ferential.aspx

Also here is quote from another driver (on another forum)

"I have had both, the Quaife is a good budget solution, but the OS Giken is in a different league as you get all the benefits of a clutch type diff with ultra smooth locking, NO clunking at all and no noticable understeer - it costs a fair bit more than the Quaife though as you need to purchase a fitting kit."

Also regarding the housing, if you have a good shop they'll install and make the custom fitting for about 400-500$ total. Not too bad.

chief63

Pros will be very comfortable. This is a serious part of machinery, don't take it to any shop, take it to a shop that specializes in transmissions and differentials and possibly already installed it before.

Read in a test that the lap time difference between a Quaife lsd and no lsd was the same as the lap time difference between the Quaife and OS Giken. Speaks for itself...

yooker

Not sure how much maintenance the OS Giken LSD would require vs the Quaife.

chief63

Normal OE maintenance schedule (oil change). That's it.

jwkim80

So you mean Quaife(or OEM LSD, gear type LSD) had no significant advantage on lap time, vs open diff?

chief63

What i meant is no lsd<quaife<os giken with about the same difference between each one. so for example the os giken would be 5 secs faster than quaife and 10 seconds faster than without an lsd