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View Full Version : New Front LSD Hotness - Wavetrac (old and borken - Quaife)



Mike W
07-11-2008, 03:56 AM
There is a new EVO front LSD in town. Autotech/Quaife USA was the importer of Quaife LSDs for the last billion years. Feeling some new competition and getting constantly copied in China they were pressuring Quaife in the UK to make some design changes. They had a bunch of good ideas but Quaife was not interested. The kids of the founder run the place now and they are happy with status quo and cashing their checks.

http://roadraceengineering.com/parts/wavetrac/wavetrac%20logos/wavetrac1_b241x95.gif

So Autotech/Quaife USA decided to put their design ideas into reality and now we have the Wavetrac. Better, stronger, and best of all since it is made in the USA cheaper since we are not fighting dollar vs eurotrash currency issues. Here is the info on it. We have already installed and tested them over the last few months. They have fixed many design issues with the prior Quaife for the EVO.


http://www.roadraceengineering.com/parts/wavetrac/wavetrac-side.jpg

Our price on these is $1150!

Bottom line...
Old and broken - Quaife
New Hotness - Wavetrac

Here is the official propaganda from Autotech Drivelines:

Innovative:
Patent pending Wavetrac® design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.
Superior Materials and Construction:
Made in the USAÂ* Â*-Â* Â*9310 steel gears run in case-hardened billet steel bodies. ARP® fasteners used throughout.
Limited LIFETIME Warranty:
All Wavetrac® differentials include a transferable, Limited Lifetime Warranty.
Features:
Enhanced No-Load Bias Ratio via its Wave Design Center Pack
One of the known shortcomings of a typical torque biasing differential like the Quaife is its loss of drive (behaving much like an open diff) under zero or near-zero torque conditions (for example, when there is 'no-load' applied through the drivetrain, either at vehicle stationary and/or transition from engine driving vehicle to engine braking and back).

http://www.roadraceengineering.com/parts/wavetrac/wavetrac-01.jpg

The Wavetrac differential uses a patent pending design to improve grip in low traction conditions. Precisely engineered, converging / diverging wave profiles are placed on one side gear and its mating preload hub. As the two side gears rotate relative to each other, each wave surface climbs the other, causing them to move apart. This imparts an increased normal force through the side gears, increasing the bias ratio as a function of load. This increase occurs automatically only when conditions find it necessary, and it 'reverts' back to its nominal bias ratio quickly and seamlessly, maintaining optimal drivability and performance at all times. It's like having two differentials in one: you get the benefit of a higher bias ratio when needed without detriment to the car's handling.

Interchangeable Friction Plates Provide Controlled Bias

Here's something else you won't find in any other design:
The Wavetrac® diff's behavior can be altered in the field to suit your needs. It comes standard with carbon-fiber bias plates for the best all around performance. Interchangeable plates using materials with different friction coefficients to fine-tune the bias ratio are sold separately.

http://www.roadraceengineering.com/parts/wavetrac/wavetrac-02.jpg

These friction plates provide a mechanism to tune the response of the differential as a function of applied torque load. The applied torque load manifests itself as an axial load from the differential pinions into the housing. This axial force is then considered a normal force into the friction plate, and as a function of the effective coefficient of friction, will provide a resistive torque to the rotational motion of the differential pinions. The resistive torque will add to the resistance of relative rotation of all components within the differential. The resistive force, however, is non-uniform since it is a function of the axial load from the differential pinions. The unbalance of the resistive torque will manifest as non-uniform energy absorption within the differential causing a bias ratio.

Superior Design, Materials, and Construction

Designed from a clean sheet, the new Wavetrac® Differential brings current gear technology to the market. Internally, its gear tooth forms are optimized for strength and improved oil film retention over competitive designs. Our gear package is smaller, reducing overall mass, yet is more durable. Attention was also paid to the side gear/axle interface, putting as much material thickness as possible in this critical area - most important when power levels get high.

Each Wavetrac® Differential is crafted from the highest quality materials available. The internal gears are made from high strength 9310 alloy steel. The diff bodies are machined from case hardened steel billet. To complete the package, every Wavetrac® differential is built exclusively using high quality, high strength fasteners from ARP®, the world leader in fastener technology.


Mike W

javicracer
07-11-2008, 05:53 AM
im so interest in get this!!!!! i might give u a call today!!!!

Miss Evo8
07-13-2008, 11:22 PM
What sort of "hotness" do you offer for the rear diff?