Run electric fans all the time?

Interesting. I've recently changed to electric fans and still dialing it in

Currently my puller fans run all the time - freeway etc. So if I am understanding this correctly, at speed as the outside air pushes into the radiator the turning fans become an obstruction on the air passing through? Controlling the fans, so they are not running at speed, helps with the air passing through?

Its safer to say its not doing any good running them at freeway speeds. If your radiator is correctly sized, you should be able to drive 45mph forever and never have them turn on even on the hottest day.