Run electric fans all the time?

Don’t run the fans all the time. At anything more than 35 mph they’ll be restricting airflow. The speed of the car moves more air through the radiator than the fans will at that point, having the fans spinning will cause more turbulence. Plus it draws a ton of current, which will cause the alternator to run at a higher output. Which steals more horsepower to turn the alternator. All just a big waste.

I run a Dakota digital controller, it works great. Been on my car since I installed my contour fans 6 years ago. This is the current version, mine was a 2750 but the updated version is the 2800

https://www.summitracing.com/parts/dak-pac2800bt