BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      10-20-2011, 12:37 PM   #1
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Wavetrac® Differentials - Special 1addicts.com pricing with FREE seals and shipping!

Enhanced No-Load Bias Ratio via its Wave Design Center Pack

One of the known shortcomings of a typical torque biasing differential 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).

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.

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.

Retail: $1295

Sale Price: $1195
FREE stub axle seals (A $40 value)
FREE shipping to the 48 States (Up to a $35 value)

Order here:
http://www.hpashop.com/Wavetrac-Diff...sd-e82-e9x.htm
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Last edited by HP Autosport; 01-28-2012 at 04:42 PM.
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      12-19-2011, 11:49 AM   #2
luster
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argh, did i miss it?
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      01-06-2012, 01:13 AM   #3
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Quote:
Originally Posted by luster View Post
argh, did i miss it?
Still on sale!
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      01-13-2012, 11:13 PM   #4
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The product page link doesn't work

Last edited by luster; 01-13-2012 at 11:21 PM.
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      01-28-2012, 04:43 PM   #5
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Quote:
Originally Posted by luster View Post
The product page link doesn't work
Thanks!

http://www.hpashop.com/Wavetrac-Diff...sd-e82-e9x.htm
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      03-07-2012, 11:26 PM   #6
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Quiafe and OS Giken LSD

No one has sold more BMW Wavetrac units than HP Autowerks and no one knows more about BMW Wavetracs than HP Autowerks.

Wavetrac for your 135i automatic $1195!

That is not all...

FREE stub axle seals value at $40!

There is more...

FREE shipping to the US 48 States!

We will price match any advertised or written quote!
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      07-01-2012, 10:20 PM   #7
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Recently had my Wavetrac installed at Sonic Motorsports. Performs flawlessly and absolutely transforms the car.
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      01-20-2013, 01:30 PM   #8
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Wavetrac LSD

FREE shipping got the US 48 States!

FREE stub axle seals!!

FREE tech support!!!
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      03-13-2013, 07:50 PM   #9
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Free US 48 shipping AND FREE stub axle seals!
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      03-23-2013, 07:47 PM   #10
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I checked your description page, but it only stated 135i auto, and 335i applications, is there a diff option for 135i's with 6MT and larger housing?
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      03-23-2013, 11:13 PM   #11
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Quote:
Originally Posted by Ginger_Extract View Post
I checked your description page, but it only stated 135i auto, and 335i applications, is there a diff option for 135i's with 6MT and larger housing?
135i 6MT needs a complete final drive as the OE ring gear is welded to the diff.

http://www.hpashop.com/Wavetrac-Comp...it-e82-e9x.htm
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      01-28-2014, 02:00 PM   #12
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Free stub axle seals and free US 48 States shipping!
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      02-04-2014, 06:56 PM   #13
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Couple of questions regarding my 2011 135i w/ 6-speed manual transmission:

#1 - If I select the 3.08 drive + $500 refundable core, how much time do I have to ship my core back?

#2 - If I opt for Sport 3.46 gearing built from brand new BMW final drives, will you buy back my 3.08 core?

#3 - How much for shipping to Quebec, Canada?

Thanks.
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      02-04-2014, 08:01 PM   #14
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Quote:
Originally Posted by dcaron9999 View Post
Couple of questions regarding my 2011 135i w/ 6-speed manual transmission:

#1 - If I select the 3.08 drive + $500 refundable core, how much time do I have to ship my core back?

#2 - If I opt for Sport 3.46 gearing built from brand new BMW final drives, will you buy back my 3.08 core?

#3 - How much for shipping to Quebec, Canada?

Thanks.
#1 - If I select the 3.08 drive + $500 refundable core, how much time do I have to ship my core back?

You have two weeks starting from the date you receive it.

#2 - If I opt for Sport 3.46 gearing built from brand new BMW final drives, will you buy back my 3.08 core?

No, the 3.46 sport final drive does not require a core and we do not purchase cores at this points as we have more cores than spaces for them at this point.

#3 - How much for shipping to Quebec, Canada?

Please PM us your postal code.
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      02-08-2014, 11:59 AM   #15
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Thinking these questions could help others to make an informed decision:

Based on this marketing claim "One of the known shortcomings of a typical torque biasing differential 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)."

#1 - Is the Wavetrac unit better suited to slippery road conditions than the other dual purpose "major" diff competitor?

#2 - Being one of the lowest cost offering out there, how does the Wavetrac hold up to the abuse at track lapping events, comparatively to competitors?

#3 - How stable is the Wavetrac entering curves and exiting them while putting the power down, comparatively to competitors?

#4 - How is the noise (clicking when load is applied/removed). Any whine noise at constant highway speeds?

#5 - Is a yearly diff fluid swap the only maintenance an owner will need to plan for?

Thanks for your excellent support!
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Last edited by dcaron9999; 02-08-2014 at 12:29 PM.
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      02-08-2014, 12:11 PM   #16
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If I did buy just the LSD how much money would it cost to install it on my auto(bolted diff)? How expensive is it $1000-1500?I know it's not cheap.
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      02-08-2014, 12:28 PM   #17
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Quote:
Originally Posted by Zombie1 View Post
If I did buy just the LSD how much money would it cost to install it on my auto(bolted diff)? How expensive is it $1000-1500?I know it's not cheap.
Ive been quoted told 3.5-4 hours of labor by the pros for the actual conversion surgery, shimming adjustments.
3 hours for removal/re-install of entire "pumpkin" to the car.
Total of 6.5-7 hours.
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Last edited by dcaron9999; 02-08-2014 at 12:56 PM.
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      02-09-2014, 11:18 PM   #18
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Quote:
Originally Posted by Zombie1 View Post
If I did buy just the LSD how much money would it cost to install it on my auto(bolted diff)? How expensive is it $1000-1500?I know it's not cheap.
For late models autos(small case) we can build one for exchange at $1995 plus a $500 refundable core.

Last edited by HP Autosport; 02-09-2014 at 11:23 PM.
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      06-09-2014, 01:16 AM   #19
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Bump!
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      10-24-2014, 12:13 PM   #20
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