I am looking at getting a batch of Wavetrac brand torque biasing diff to suit H165 manufactured. Approximate price landed in Australia would be $1200 or so. If anyone is interested email matt: mhow71@hotmail.com
For technical info on the product go to www.wavetrac.net

I just had a look at this wavetrak diff centre and it makes sense!I just sold one of top gears centre's in regards to this exact reason,once you lose a bit of traction on the unloaded side of car it will spin up,this centre reacts to that and locks up!Definitely be keen for one!

theres a simple concept to consider...

any traction being used to turn the corner can not be also used to accelerate the car

therefore.... if your turning the car so aggressively that a wheel is lifting, theres no traction left in the tyre that remains on the ground to accelerate

in fact if you are turning that hard you wont want to accelerate

the only time it becomes a downfall is if you fall in a ditch with one wheel in the air... then you get the navigator to jump on the boot

In what situation are you concerned that having one wheel in the air is going to limit your drive, and why do you think you will be trying to accelerate in this condition anyway?

All limited slip differentials make sense. I'm sure if you buy it it will work. So will a Nismo LSD.

This is like the 2-way versus 1.5 way discussion. Sure they are different, but one is not absolutely better than the other, there are tradeoffs.

The wavetrac sounds similar to a bosch torsen.

1200rallycar, my understanding is that it is not just a matter of accelerating while a wheel is in the air, but stopping deceleration (as soon as you stop getting power to that wheel the car slows down). Also stopping the wheel in the air from spinning at much greater than road speed when it hits the ground again. From what I've read from people that have used diffs that do this, they are not very nice to drive in this situation (read very frustrating).

I've never used one myself, this is just my understanding of how they work...

have sent sample diff centre to the US for production quote please let me know if interested

what centre did you send over? Type I or type II?

Not that I actually know the difference between them but from what I can tell there are differences and the R&P can't be swapped between them?

LSD is not part of the R&P, so might fit both types.

yeah, thats what confuses me, the ring will bolt to the centre so where is the difference? Is it in how the centre bolts into the carrier or the ring etc.

Never really been able to figure out from the Wiki what the difference is..

well generally with Hitachi the pinion is different, different diameter or different underslung point. Then the ring matches that.