They claim a torque bias ratio of 5:1, where a Torsen T-2R is 4:1, a standard Torsen T-2 is 2:1, and a Detroit TrueTrac is around 3:1. So it's a bit more aggressive about transferring power than the other common helical types.
Their ad seems to contradict itself, though:
Quote:
This is a preloaded unit allowing for a faster reacting unit.
but
Quote:
However, five times zero is still zero, so all of these helical LSDs work best when both wheels are 'planted' and some traction on the slipping wheel is still available.
Some helical differentials have springs that press the friction plates at all times, allowing some power to be transferred even with one tire lifted. Some Torsen units are like this, and the Wavetrac uses a cam system to ramp up friction pressure when the wheels have different traction levels.
Their first quote states that it's a preloaded unit, but the second quote implies that it's not, and their blowout photo doesn't appear to show internal springs.
https://www.speedmaster79.com/Mazda-MX5 ... fferential