Και τι λέει ο Αριστοτέλης :
It's not an active rear steering. Simply put, there are bushings in the suspension that depending on the load, bend in one way or another, slightly steering the wheels about 0.3° against the front steering wheel angle if the g's are less than 0.5g, or at the same front steering wheel angle if the g forcers are superior to 0.5g
There is no way to simulate this with bump steer, you need the have both rear wheels steering to the same direction and the opposite depending on the load. We can now simulate this.
EDIT: since the effect is cool but not so precise (and passive) it is usually eliminated from tuned cars with harder bushings. As a matter of fact our tuned RX7 car doesn't have it. We did some homework
On the contrary, R34 system is active. It turns the rear wheels differently depending on the front steer, g forces, yaw angles etc.