differential of rear traction

[ghiboz]

hi all!
I have a question about the differential parameters...
basically the differential have 2 configurations: open or closed (and more between the 2)
a closed differential means that when the car make a turn, the difference between the rotation of the 2 wheels is little, this is more powerful, more stable on the fast turns but hard to turn in the hairpins and slow turns (is like a kart for example)
the open differential means that when the car make a turn, the difference between the rotation of the wheels is big, this is less powerful, less stable but have a big handling for the hairpins, and the slow turns...

now in VDrift, how can I configure the rear differential to have these 2 situations (these are the limits case...)

thanks!