Originally Posted by tp777fo

​​​​​Philip Avonds taught me years ago to place the restrictors on the down (exhaust) side. When you go gear down the restrictor causes pressure on the down side to fight the air coming in thus slowing the gear extension. You will still get the full pressure it just takes longer. Air retracts need volume as much as pressure. If you put a restrictor at the valve you reduce the volume of air to the entire system. Our bigger heavy gear need the volume to work. Gear such as spring air with wire struts are much lighter and require less volume to work. Dont believe the volume theory just remove 3 of your 4air tanks and see how they work. Bottom line its Ford v Chevy. Try it both ways and see which one works best for you