Automatic grill shutter

This is a spring loaded grill shutter designed to close automatically once air pressure reaches a certain level. The sutter is intended for only one of 2 primary radiator openings. Limit switches indicate close position. I built this shutter prototype as uploaded and have it installed on my truck and have it tunned to shut around 60 mph. Engine temp remains constant, even at 110 F degrees ambiant. This is my design but if someone can put it to good use, go ahead.