BWR Custom Tuned OS Giken Differential - LotusTalk - The Lotus Cars Community
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post #1 of 1 (permalink) Old 04-06-2017, 12:29 PM Thread Starter
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Join Date: Oct 2003
Location: Tempe, AZ
Posts: 3,083
BWR Custom Tuned OS Giken Differential

Great News, OS Giken has recently dropped their prices on their differentials!

As you may recall, Blackwatch Racing did the development on the OS Giken differential for Lotus. This involves installing and removing the transmission AND tearing apart the transmission multiple times to dial it in. I have probably 150 hours of wrenching and R&D to get this right. Not getting the correct setup makes the car either push like a snowplow or be tail-happy like a drift car. Once dialed in, it is fantastic. Our proprietary spec provides more grip on corner exit than anything else available in a Lotus. We've used this setup in our XP-Prepared AutoX car to 7 championships and our Optima Ultimate street car. That car is the only Lotus ever to Win in an Optima Class OR the overall win.

The finished, proven solution is available here:

Of course if we build your transmission for you, installation is free.
TachItUp and 310tmac like this.

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