fair enough, just thought the way a clutch lsd worked was it allowed slip under different torque conditions applied at wheels, reguardless of speed, so i wasn't aware speed would have anything to do with it.....

A torsion on the other hand locks up harder the more torque is forced through it.

That is what i'm lead to beleive anyway, please correct me if im wrong, but i would sure like some sort of back up, not just from what i've told by some bloke down the road.....

Not to dis you or what your friends have done, but diffs can be funny. If the wrong oil is used or the packs aren't great they don't perform well. Overtightening them will lead to premature pack wear when turning corners normally and will foul the oil quicker which in turn will cause the friction modifiers in the oil to not work correctly and the centre to slip easyer. The premature wear will also cause preload to deminish which also means easyer slip.

I have done a little with diffs, and from the hilux centres, in a 4wd application anyway, sandblasting the metal plates between friction disks helps quite a lot, gives the friction disks something to grip on. This helps the nissan diffs to, but they are a better lsd from factory so the difference isn't as noticable. Doing this does cause the above metioned premature wear and the like, which means shorter oil life and rebuilding the lsd more often (which means actually replacing the packs).

I am new to the performance car type world though, do a lot of work on 4wd's and trucks though where, in my opinion, the diff does do a lot more work and is subject to a lot more load due to gear ratios used and weight of the vehicle. But we all get proven wrong every so often, and we all never stop learning, so yeah, i welcome any criticism to what i have seen/said as i am still understanding how small cars behave compaired to what i have played with.......