Hi Pud, The torque biasing diffs (e.g. Torsen and Quaife) can only transfer torque up to a certain proportion which is hardwired into the diff, and non-configurable (the torque bias ratio).
Something like 2:1 or 2.5:1 for the quaife diff (Torsen Q2 are 2.5:1 think) .
So yes you definitely can spin one wheel uselessly even with a torque biasing diff - if you try hard enough with a powerful enough car.
..and you get some ****-off torque steer at that point it happens into the bargain!
(Trust me, I have more experience than most in this regard
Basically the issue is that the diffs are torque multipliers and 2.5 times 0 is zero if one wheel has no traction.
BTW I have a quaife diff on my modest 1.5L Starlet Autotest car (130bhp and 500kg is deceptivey fast though..), its really great for very very tight radius corners and circling where a clutch type diff would cause understeer..
Quaife is an excellent choice for a TS, no downside whatsoever.
I had no problems spinning a single wheel on my heavily modified GTA with a mechanical Q2, but with the clutchtype diff I replaced the Q2 with you really do have to spin both wheels before traction is lost - and you have to be a real pillock with the throttle
Basically on track 2nd gear out of tight corners even with with type-R tyres wasn't really usable with the Q2, but was with the AD diff.
Not sure I understand.
As I understand it, if the inside wheel span up, the outside wheel would get proportionally more and more of the available torque, until either the inside wheel regained traction or the outside wheel span up instead. If the latter happened, and you kept the power on, surely both wheels would just keep spinning? Obviously you'd need a lot of power to do this, doing it in a straight line would be near impossible..