carlysimon
Member
The Wavetrac is very similar to the Quaife as they are both working on the same principle of helical gears.
One of the issues with the Quaife is that under no or little grip on one wheel there is very little torque transfer to the wheel with grip and power can still spin away.
With the Wavetrac there is a wavy 'gear' in the middle which still allows some torque to be transferred across the axle under low load conditions, such as turning out of a T-junction and going over the crest in the road. It also has carbon fibre bias plates to allow consistent friction over its lifetime whereas the Quaife can polish its housing with the end of the gears leading to less friction making it less effective.
The Quaife on my Z4 was virtually undetectable most of the time but did work nicely when needed. However, I can feel the Wavetrac locking up more aggressively and sooner. It works well off the line and in corners.
In terms of price they are similar but the Quaife is more widely available so sometimes on offer. You can get a Wavetrac fitted for £1,600 at Regal Autosport in Southampton who are the UK distributors.
That's really helpful, Many thanks, Simon.