O.S. Giken "DualCore" LSD

OptionZero

Filtering through Japanese sites and advertisements, here is the best description I could find. Unfortunately, it is from 2014, and it's from OS Giken USA's Corvette build:

https://www.corvetteforum.com/forums...ln-2015-a.html

What is the benefit of Dual Core?

Improved Turn-in
. When converted to a one-way configuration turn-in ability improves due to the decrease in static decel lock from the pressure ring. The benefit of the variable deceleration lock provides the stability under trail braking and corner entry.

Variable Deceleration lock
. Decel lock is now determined through the difference in
wheel speed. This compensates for the lack of initial decel ramp angle by going to a one-way configuration and allowing the helical side gears to engage the differential lock during cornering. The greater the wheel speed difference, the more the differential will provide locking. This lock can start at 0% utilizing our new zero preload option for Dual Core use.

Smoother Acceleration Lock
. The transition from deceleration locking to
acceleration lock is seamless. This is due to the helical side gears being active during cornering. As there is difference in wheel speed; the clutch plates are locking mid-corner at about 30% total lock. As you pick up throttle there is no abrupt action caused by differential locking. On some Super Lock applications slight wheel spin may occur during curb hopping maneuvers or when one wheel is off the racing surface. The Dual Core cures that and stays locked even when the vehicle is temporarily airborne.

***Our LSD's are fully tune-able; however, I must disclose that all tuning is done in house here at OS Giken USA. This is similar to how one would submit their shock absorbers (Penske, Moton, etc) in for service. Tuning parts are not sold to the general public. The reason for this is for the customer's ease of mind. We have the experience and data to be able to achieve the characteristics you want from your differential. Also the complexity of reassembly is much more than your typical clutch type differential. There are many little details that need to be followed in order to have a proper working diff. We have seen many units come back to us due to improper tuning that we would like to protect our customers by providing a service linked to the us directly. We want our customers to be fully satisfied with their unit and tuning is a daunting task especially for our units.***

MSRP for LSD Tune when purchasing a new differential is $150. MSRP for LSD upgrade will be $150 plus cost of parts. Please note that Dual Core will be available for the C5/C6 sometime late in the year transitioning to 2016 once full development and extensive testing (Track and Autocross) has been performed.

We are still in the process of firming up applications with Japan. At this time we do not have a set cost on upgrading LSD units to Dual Core at this time as we are still in testing phase. You will see release of various applications towards the end of the year and enter 2016.

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