Alternate physics model.Wheels loose grip.

Hi to everyone! How to set minimum slip ratio, and velocity for wheels, or limit engine rpm? When I ride on bumps or do hard maneuvers wheels immediately loosing grip to extreme low values, and start spin like hell. Engine RPM, during spin, can reach cosmic values. Car stay uncontrolable until wheels not stop, and get grip again, only then you can ride, untill glitch appears.
Tweaking pacejka values(and others) won’t help.
BTW I use windows platform, may be glitch will not appears on Mac. Anyway, to understand clearly what I mean: drop GMC(from ~AlternatePhysicsModel), set more power and torque to engine values for it, turn off Traction control(faster result), and drive hard.
THX!

Try to decrease engine torque and power.