WheelCollider is weirdly affected by Solver iteration count

I wanted to see how changing the solver iteration count (SIC form here-on-in), only for it to make the wheel collider I'm using for the wheels of my vehicle to overly react to the same amount of torque. Specifically, higher iteration count makes the wheels go faster.

 public WheelCollider[] WheelColliders;

 void FixedUpdate()
 {
     SetWheelTorqueForward( inputM.GetAxis("Vertical") * enginePower * Time.fixedDeltaTime );
 }

 void SetWheelTorqueForward(float f)
 {
     foreach( WheelCollider wc in WheelColliders )
         wc.motorTorque = f;
 }

I am asking which of the following is true:

Am I misusing the torque on the WheelCollider?

Am I misinterpreting the SIC, because from my understanding it should not make the vehicle faster and this is actually WAD?

Is this a bug concerning the WheelCollider when changing SIC (since it can be generally assumed the SIC stays unchanged in-game)?