You mentioned that you thought it was the same as the AD LSD, in which case the publically advertised AD LSD on the web site is a 30% progressive lock limited slip diff.
AFAIK this implies "clutch type" since Quaife/Torsen diffs can't lock at all, if one wheel gets totally unloaded they stop working.
Despite owning one I confess to not knowing whether it is 1, 1.5, or a 2 way diff
i.e. whether it works under braking as well.
Certainly my cars stability under braking has improved hugely since I got it, but I had the AD Sportline coilovers fitted at the same time and these would have helped hugely by themselves.
Had a look at the web photos of the Madeno and AD LSD and they look very slightly different, but AD do have 2 or three LSDs that they use - A 25% annd a 30% progressive lock, and some other one that is very agressive that I can't remember.
RE comparisons between clutch type and torque sensing diffs : most of the stuff I found on the web when I tried to find out more about this stuff previously relates to non racing applications.
Their explanations ran out at the 100% only locking LSD which does cause understeer, and didn't really cover the effects of LSDs that allow significantly different wheel speeds before locking.
Most "forum related" posts that I found did seem to indicate that quaiffe diffs did induce less understeer but it wasn't clear about the level of sophisticatoin of clutch type diff they were comparing against .
One source I had found stated that most BTCC cars use clutch type diffs which (if true) would mean they can't be too understeery
I believe this was because they do tend to have the inside front wheel airborne a bit and the Quaiffe diff stops operating in this situation.
RE clutch type LSD life: good question - I didn't ask!
However the Kaaz LSD site (quality LSD maker favoured by drifters) mentions 100,000 miles, which if true isn't a big deal.
Since Autodelta are using the advertised LSD in their 328BHP 156/147 GTA-AMs I suspect that they aren't going to fall apart any time soon for a standard GTA
Originally Posted by Peter K
From the looks of it, the Madeno LSD is a mechanical type?