I'm not disputing that more air is better, more air IS better.
And you'll get more air with the fans NOT running when the car is moving at speed.
At best, running the fan at speed is a waste of power. At worst, running the fan at speed is actually interfering with the incoming air because the volume of incoming air will exceed the volume of air that the fan is moving. My car runs colder at 50mph with the fans off than it does when the fans are running. With my fans set on a digital controller they pretty much never come on once I'm going more than 35mph for more than a few minutes, even when it's 100°+ out. It means more air is getting through without the fan on.
