We've used Quaife LSD differential since we opened our shop in June of 2006. We have put this differential to the test with multiple low nine second passes at over 160mph. Hard launches with and an average 60fts in the low 1.50's. There's no better differential out there in the market.
The Quaife Differential powers both drive wheels under nearly all conditions, instead of just one. With an ordinary open differential, standard on most cars, a lot of precious power is wasted during wheelspin under acceleration. This happens because the open differential shifts power to the wheel with less grip (along the path of least resistance). The Quaife, however, does just the opposite. It senses which wheel has the better grip, and biases the power to that wheel. It does this smoothly and constantly, and without ever completely removing power from the other wheel.