Before you do anything you need to determine the amount of horsepower being used by your current belt (I assume) drive fan. It is not a difficult calcualtion but you do need to get the drive ratio (fanrpm/engine rpm). It may be that your fan is not sucking a lot of HP.
You would need to add a hydro transmission temp gauge also.
JT
You would need to add a hydro transmission temp gauge also.
JT