Does anyone know what CFM the stock fan moves? Im thinking about a electric fan(s), but want to keep the same or more CFM.

 

Thats a big fan as a guess I would say it can move 5000-8000 cfm. I think it takes 10-15 hp when the clutch is engaged. I know on a hot day with the ac on when it engages the truck slows down and my mpg drops about 1 mpg.

 

If its 8000 CFM that would be tuff to duplicate with electric fans, especially when driving.

 

Yup -- an electric fan clutch would be great, but an electric fan would not cut it too well. You don't want to try to draw that 10hp through your alternator, IMO.