In the cars it does, most do not have the temp switch that the trucks do. I do not think the trucks shut off the compressor under high power and not all cars do. Mits has wired the AC trough the ECU so it can but it is up to the firmware if they use this feature or not.
A purge valve or EGR may be about right for a kickup, I think an aquarium valve is not enough airflow, unless you guys have much bigger fishys than we do up here.