Air Input

[Low]

We all know that the X-valve heats up due to the massive recharge rate. The gasses expand etc etc etc

Has anyone thought of purposly heating HPA after it comes out of the tank? By having some sort of heating coil (limited to a specific, lower degree) in a SS line to heat the incoming air, would it be possible to achieve greater efficiency (as the gas is expanding)?

Granted, upon rapid fire the air wouldn't be as heated etc.. there are many problems with this.. it would change the trigger bounce etc.. but has this ever been considered?

[Wat]

You have it swapped. Expanding gas tends to cool while compressing gas tends to heat up. The RT type valves heat up because as the dump chamber is being filled, the gas is being compressed in it.

As for increase efficiency, more heat = more energy = more shots. The question is where more heat comes from. There is a tremendous amount of energy in an HPA tank, orders and orders more magnitude than what is in a battery. A battery powered system would have minimal improvements and if it were small enough to be on gun, i doubt you would even notice it.