Fast break with wheel colliders

Hello everyone,

i am encountering some problems with vehicles i want to simulate. The setting is a 2.5D game where vehicles can move in one of several distinct layers of the map. That's the plan. To create a more realistic look for cars which drive over obstacles i am using wheel colliders. Unfortunately i am a complete newbie at this and i just can't figure out how to set up my wheels to get the behaviour i want.

My main issues which i couldn't solve with my favorite search engine until now are the following:

• i want a really short way to decelerate (rather comic-like setting)

• fast acceleration

• not too much bumpiness

Making the forwardfriction higher helps with braking but the effect is that my car gets really wobbly, even on a simple plane. If i add more torque to get higher acceleration the distance to stop gets ridiculously long as if the ground was really slippery (like 75% of the distance i took to accelerate).

After failing with configuration i tried to achieve something similar with sphere-colliders and transforming the position of my object but this approach has some major issues so i am back at wheel colliders again.

I appreciate any ideas on the subject.

Current setup:

Mass of the vehicle is 1300. Wheel damping didn't chang anything noticeably. Forward-Stiffness 5 is already trouble-inducing T_T

I played a lot with the Forward-Friction values because that's the only axis i want to move on.

The relevant code snippet for acceleration is as follows:

 public void FixedUpdate()
     {
         float motor = maxMotorTorque * Input.GetAxis("Vertical");
        
 
         foreach (AxleInfo axleInfo in axleInfos)
         {
             if (axleInfo.motor)
             {
                 axleInfo.leftWheel.motorTorque = motor;
                 axleInfo.rightWheel.motorTorque = motor;
             }
         }        
     }

If any more information is needed i will gladly provide it.

Thanks for any help!