928 Motorsports, LLC ®
 
 

     
     
     
928 Motorsports
r o a d   m a p
928 Motorsports

928 Motorsports
m u l t i m e d i a
928 Motorsports
928 Motorsports 928 Motorsports

t r a c k   t i m e

 

 

SUPER-LOCK LSD for Porsche® 928 Models


Application: Porsche® 928 with 928 G28.12/13/55 Transaxle, found in the 1987-1991 928 S4 and GT models.

928 Motorsports LLC® is proud to announce our partnership with Gbox and OS Giken to make a limited production run of the patented and applauded OS Super-Lock LSD especially for the Porsche 928.

Not a new product: the OS Giken Super-Lock LSD is currently available for the 911, 930, 964, 993 and 996 models; and has already enjoyed more than a decade of success in the most arduous racing environments. This is a new application of a road-and-race proven product.

We selected the most commonly raced transaxle models, the 87-91 5 speed, and commissioned a limited production run of 10 LSD units. They are expected to sell out quickly.

This Limited-Slip Differential is completely street-able, yet has tremendous durability on the track and the smoothest progressions, making it also very easy to drive even at very high HP and Torque levels.  And, because it achieves a higher degree (up to 100%) of lock, it generates less friction, making less heat and lasting much longer than ordinary LSD's.

The Super-Lock LSD features an innovative lock-timing system that under low or normal load conditions allows the differential to function as an open differential, however, once load is applied it smoothly transforms into a 100% locking diff (no more issues with turn-in)!

Superior Design
  • Miniaturized pressure ring and a superior spline-through-side-gear design allows for fitment of more friction plates (up to 2x as many as competitors versions), offering true 100% lock capability.
  • Patented pressure ring design allows for smooth, progressive locking
  • LSD case has a relief cut-out for the cone spring, resulting in minimal cone spring degradation and enhanced durability.
Superior Construction
  • All components are chemically heat treated for maximum durability
  • All components are constructed from a high-grade steel alloy
  • Gears are raw-forged for maximum strength
  • Clutch disks are precision-machined simultaneously on both sides to extremely tight tolerances resulting in minimal warpage.
  • LSD case is machined from a single billet piece to ensure uniformity.
Superior Overall Performance
  • The Super-Lock LSD standard spec allows for low preload while still
  • retaining a fully progressive 100% lock capability; basically, the vehicle will feel like driving on an open diff in slow turns / street driving, but can still transmit maximum power to the drive wheels under load.
  • Operation is ultra quiet, and the progressive locking allows for smooth, predictable locking. Especially when replacing an open diff, equipping OS LSD will completely improve the driving experience while maintaining everyday drivability.
  • Due to the precision manufacturing, high-grade materials, and unique design, a break-in period nor rebuild is required. This LSD is purposefully over-engineered to offer the best performing, most durable clutch-type LSD available.
  • Aside from the performance advantage and stock-like feel at slow speeds, vehicles equipped with the Super-Lock LSD are more stable in all road/weather conditions, allowing for a safer driving experience.
Tunability
  • Initial torque can be adjusted by using thicker / thinner cone springs
  • Lock progression timing can be adjusted by using stiffer / weaker pressure ring springs, allowing the progression of full lock to be fine-tuned to the vehicle/driver.
  • Ramp angles can be customized by swapping the pressure ring and iron cross for even more tuning possibilities.
  • TCD spec disks can be installed for increased oil cooling and even smoother operation.

What is the difference between the SUPER-LOCK LSD and another companies LSD?

In racing applications, the function of the LSD is to allow the drive wheels to apply equal traction under acceleration and deceleration. Unlike our competitors' products, the OS Giken SUPER LOCK LSD is engineered to be extremely responsive to throttle input to smoothly lock or loosen accordingly. Through its innovative and patented design, up to twice as many friction plates are able to fit into the housing when compared to our competitors' products, enabling the OS Giken SUPER LOCK LSD to achieve true 100% locking capability. Unlike our competitors, the OS Giken SUPER LOCK LSD is also customizable by adjusting the spring inside the pressure ring. Additionally, its superior design allows for excellent streetability, virtually eliminating the "chatter" associated with other clutch type LSD brands. Each component of every OS Giken SUPER LOCK LSD uses only the highest grade materials and manufacturing processes and is constructed and finished to extremely tight tolerances, eliminating any "break-in" period necessary with other brands. Due to its superior design and extreme care throughout the manufacturing process, there has yet to be a case recorded of an OS Giken SUPER LOCK LSD failing in the field, or even requiring a rebuild!
SUPER LOCK LSD Advantages:
  • A true 100% locking LSD: No movement of internal parts means less heat is generated while in operation and less wear of the friction disks. Less initial torque loss and incredible longevity and durability can be realized.
  • Proven Durability and Reliability: No drop in performance or loss of initial torque, even during long and stressful endurance races.
  • Straight line stability: During a drag race, our LSD will lock 100% and provide torque equally to each powered wheel. Stable and straight runs will result thus eliminating torque steer in FF applications and lower the chance of drive-shaft breakage.
  • Customizable: Lock timing can be customized by adjusting the spring inside the pressure ring. Tune the LSD to custom fit any application and set-up of your desired vehicle and driving style/skill level for optimum performance.
  • By using a pressure control ring, the LSD responds smoothly to the application of initial torque. Lock engagement is smooth and the impact vibration is significantly reduced. This increases the stability of the vehicle and allows more freedom for the driver to trace the desired racing line.
  • On snow tracks and regions with unstable road conditions, our SUPER-LOCK LSD easily adapts and adjusts tire rotation to increase vehicle stability. Bad weather and harsh road conditions are not a problem when the vehicle is equipped with a SUPER-LOCK LSD
  • Less under-steer during cornering: When entering into a corner with the throttle closed, the spring inside the pressure control ring will react accordingly and immediately return the differential's internal components to the original initial torque settings and thus creating less under-steer. However, with a conventional differential, there will be a lapse of time before returning to the initial torque settings, as it takes time for the cone springs to react and make contact with the friction disk in order to close the pressure ring.
  • When exiting from a corner, our LSD's transition to the full 100% lock position is smooth and predictable. This gives the vehicle better traction and stability, resulting in better lap times while racing.
  • SUPER-LOCK LSDs do not require any break-in process. SUPER=LOCK LSD's are composed of parts that have been precisely machined to exact specifications and are ready to use upon installation.
  • Less under-steer during cornering: When entering into a corner with the throttle closed, the spring inside the pressure control ring will react accordingly and immediately return the differential's internal components to the original initial torque settings and thus creating less under-steer. However, with a conventional differential, there will be a lapse of time before returning to the initial torque settings, as it takes time for the cone springs to react and make contact with the friction disk in order to close the pressure ring.
  • When exiting from a corner, our LSD's transition to the full 100% lock position is smooth and predictable. This gives the vehicle better traction and stability, resulting in better lap times while racing.

Item

Part Number

Price
(USD)

Shipping

Availability

SUPER-LOCK LSD for Porsche® 928 Models

TRA-SLLSD

$38.00

Call for availability

* Domestic US shipping shown. International shipping will be calculated based on location.

 
   
       

Phone: (920) 485-0928
Email: info@928motorsports.com

928 Motorsports, LLC - All Rights Reserved
Horicon, Wisconsin USA

928Motorsports.com - Performance Parts for your Porsche® 928