Really hard to beat a mechanically driven fan. But in a Bronco a fan shroud (full shroud, not a decretive finger guard) is a must. Electric fans can work. They need to pull a lot of air through the radiator core. Too bad all the advertising numbers tend to show free air numbers. Not a realistic value in real life.
The fans that do work are typically engineered for production cars that have a fairly high cooling demand. They have the power to move lots of air through cooling cores. That power takes power. Now add in a heafty electrical upgrade. Some of the fans have power demands as great as the original alternator peak output on a good day. So do a 3G and jump the charge wire straight to the battery starts off as the easy fix. No you have belt squeal and don't have a way to monitor the charge status. So belt and pulley upgrades are added and do a volt meter converstion.
Wait, we are not done yet. we still need to source parts and build some way of controlling the new fan. You don't want it on whenever the ignition is on. Nor do you want it manual control, too easy to forget to turn it on. Need a thermostatic switch, but what temp rating and where do you put it?
Sure it sounds like a simple project, but it snowballs real bad.
