Clutch fan vs derale single 2400cfm fan

Before I would spend a lot of funds on aftermarket fans or components, I would experiment on changing the fan pullies sizes or diameters. A smaller pulley would speed the fan movement at idle, while a larger one would slow the flow, but also change the water movement at the pump. Sometimes slowing down the water flow will help in cooling, while a speedy flow will not allow the water to cool fast enough in the radiator. You need to find the right medium to your app.. Also make sure your clutch is functioning correctly. You want a drag, but not too much or you will a little HP.