Upgrade mechanical fan vs installing electric fan

@Jimacuda While I’m not convinced of the “exponential” portion of power lose ether, I do believe to use the least power robbing unit possible. This is just basic hot rodding sense.

What I see in your picture is a fixed fan. A switch to a viscous coupling would be a good move. When it comes to the fan itself, the number one item is how well it moves air since that is the cooling function it is employed to do and it must do it. If you can get away with what ever style can you want to run, then your in good shape.

I just don’t know which (actual) fan moves the most air. I myself stuck with the MP viscous fan set up with the fan having 5 oddly placed blades.