If you could PULL the air thru the radiator you could make better use of your radiator I would think. At least some of the air (with the fan behind) is being pushed against the radiator itself. With the fan pulling air from the front side, you have a bonus of more air circulation. A vehicle pulls the air though - if it was pushing the air, it would be working against the natural airflow of the moving vehicle. I realize this is an old thread, but maybe food for thought for anyone looking into this type of system.
