Grit dog wrote:
The 5 psi thing is a reccomendation for airbags that don't have bump stops in them, to prevent possible pinching the bag if you bottom out the suspension.
In reality, that doesn't matter drivin empty becasue you're not going to bottom out the rear suspension unless you get seriously Airborne!
So, no, airbags woildnt reduce your ride quality when empty if you leave them empty.
Timbrens are another great option.
My Air Lift Loadlifter 5000 bags with bumpers have a minimum 5 lb psi recommendation. I think it is more about retaining the shape than bottoming out.