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fast69mopar · 07-14-2022, **(Subject: Electric fans )**

(07-06-2022 )Bengy88 Wrote: Has anyone here tried electric fans on their truck yet? I’ve got an n14 and the bolts for the fan hub broke off in the top of the block so I’m installing 2 20 inch and 2 14 inch fans on the radiator. Im assuming that will be plenty of air flow and should keep everyone running correctly and I’m hoping it helps with fuel mileage. If anyone has ever done this please let me know how it turned out so I know what to expect l. And yes I am wiring them up properly.

I saw your post the day you put it up and I thought I type out a reply but I never hit the post button dangit.

I tried this exact setup but on a 14.0L in a 2005 Freightliner Columbia pulling a flatbed on a daily basis. I also tried this idea on my 2011 RAM 3500 with a 6.7-ISB set at the stock 325HP/650FT-LBS and at 425HP/1000FT-LBS and it pulled a 4-car wedge at 37,000lbs.

For the 2005 Columbia I used a pair of SPAL 18" fans in a shroud that flowed 5700CFM each and a pair of Derale 16" fans that flowed 4500CFM each inside their own smaller shrouds. The stock alternator was unable to handle the amperage draw so I had to switch to a 340A alternator. When I was empty the engine stayed super cool. When I was loaded the coolant temps would rise by 6°-8° which was just fine and this was on flat ground. If I hit anything more than a 3% grade the temps would start climbing and if it was in the mountains things got out of hand. I was having to stop multiple times to cool it down to the point where I was losing hours of my day. When I did the install for both trucks I had the SPAL 18" fans wired to come on together. They were provided power through a relay setup with a circuit breaker and they were thermostatically controlled by a probe in the radiator. The other Derale 16" fans were wired independent of each other and they were thermostatically controlled to come on a different coolant temps.

The RAM 3500 was fine with the electric fans on any terrain except for the mountains. I did everything I could do to get each one to run cooler but I was unsuccessful and ended up switching back to the clutch fan.