There seems to be many ways to cut bread and so it is with LSD's. However I had always thought that a Torsen ATB was an ATB. Now I seem to know a little more as the Torsen2 motorsport differential added a preload on the helical gears to provide some drive when one wheel had no traction.
However I'm a little confused by this differential...can anyone shed some light on it's manner of operation and worth of it's supposed advantages?

http://www.wavetrac.net/technical.htm

no one?...oh well.

Don't give up! Live in hope...!

Problem with ATB diffs is poor traction when one wheel has poor grip, this seems to overcome the problem. My question would be why not just use a plate diff?

well no such thing exists for the FWD mitsubishi 380/galant/eclipse transaxle I'm using. There is this and the quaife unit and I'm more motorsport focused than road focused...getting a plate lsd made would be roughly 2.5 times the cost.

Who is using these in Motorsports I didn't see them mention anyone which would make me nervous

fair point.

I know people who swear by Quaife diffs and others who swear at them! I am perhaps stating the obvious here but whether or not the Torsen2 will be an advantage will depend on if you have a situation where one of your driven wheels will be on a much lower friction surface or be loaded a lot less, more likely in rallying than racing I would think although if you have a high c of g and narrow track you may also have a problem. The other consideration is your engine output relative to your tyre grip (and the bias ratio of the diff). Say the ratio is three, if your engine output won't overcome four times the low grip value you won't get wheelspin.
When you say you are using the transaxle, are you using front or rear drive?

I am using a FWD transaxle in a RWD application. Occasionally in an event one wheel may end up in the dirt or on a ripple strip. A plate LSD is usually considered superior if you drive aggressively, however no such differential is available at the moment.