Messing with WheelCollider Suspension

I'm having problems the the WheelCollider suspension variables. Right now, I'm just groping about blindly in the dark, adjusting variables and seeing how my Jeep rides. Unfortunately, as you may imagine, I'm making really slow progress. So what are some generic values for the suspension variables if you're trying to make a relatively bouncy Jeep?

Thanks - Elliot Bonneville

i use something like the mass of the car and add a zero at the end e.g

mass 1000 spring 10000