How does TC/VSC act with aftermarket LSD?
 

If a guy was to swap a KAAZ/Cusco etc 2-way locker in .. would there be any issue with the VSC/TC? Would you have to just leave both disabled?

The torsen is not too bad, but it just doesn't sen the tor the way I'd like it to.

If you're going to replace the stock diff, I'd suggest a 1.5 way unless you're mostly interested in drifting.

I can't see how it would mess with the electronics, the stock diff is 100% mechanical so you shouldn't have any issues.

Daily driving a 2-way is no biggie... and the reason would be for drifting.

I think where you are most likely to run into some issues is driving on split-Mu surfaces. I'm talking about when one side of the vehicle is on a slippery surface and one side has significantly more traction.

The stability control system was calibrated with the bias ratio of the stock differential--its torque transfer characteristics. If you change that by switching to say a clutch-type, you could have instability in some situations if the calculations have been thrown off.

The stock unit honestly is complete garbage in these situations anyways. I spend most of my time with the TC/VSC completely off as is.

If I lose the tires .. I lose the tires at a point where the correction from TC/VSC is going to just make the other end of the car hit the wall. I've gotten more comfortable correcting the car with all driving aids off.

You lift, you die.

Stock is 2 way as well. I didn't suggest 1.5 way for daily usage, it's more stable/predictable under heavy braking and almost all cars built for lapping/track racing prefer a 1.5 way over a 2 way. For drifting a 2 way is definitely the best bet.

Is the VSC really that smart? All it really does is apply the brakes to specific corners to keep the tail in line, I don't think it has anything to do with the stock diff bias ratio. It's also cutting throttle if it detects wheelspin, which really takes the diff out of the equation.