DeralePerformance 16825 Gray/Black High Output Dual Radiator Fan

I installed these fans on a Z24i engine that originally had belt driven cooling. I am in an area that gets hotter every year and I needed massive A/C cooling especially when idling in direct sun at 100+ degrees (in 2020 just had 28 straight days over 100 with one day at 117 and one at 114) and on the ''parking lot'' that is the second worst interstate for traffic jams in the US. I tripled the size of the radiator, installed larger compressor, condenser, and evaporator, upgraded the alternator from 50A to 120A, upgraded to an an electric water pump (original had to be eliminated to make room for the fans and larger radiator and condenser) and finally an electronic external variable temp controlled (pot on dash) engine coolant thermo. The only thing I did not upgrade was the stock crank (3 sheave) pulley as there was simply no way to make room for a serpentine belt system without so much modding that I would still be working on it 8 years later. I had to fit V-belt pulleys on the new alternator and compressor as they came with serpentine. The fans were a major headache to install but I managed to get everything in there. Unfortunately I ran into belt slippage due to the huge amount of extra torque required by the upgrade. I tried machining the pulleys to make them grip better, but finally had to actually weld cogs into the pulley Vs to match the internally cogged belts so they would not slip. When both these fans kick in they draw ~60 amps and that puts a hell of a load on the alternator which has to supply more current just for the fans that the entire vehicle used before the upgrade. I also installed a bank of high beam lights all around the vehicle for off road use that adds even more. The one thing that is a bit disconcerting about the fans is the huge amount of noise even one fan puts out. It sounds like a jet engine and when I pull in my driveway late at night the neighbors aren't enthused and every dog for 1/4 mile around starts barking. Also, when I pull into a parking lot and these babies kick in I get surprised looks from everyone. Even so they move a tremendous amount of air and I have never come close to an overheat in any situation. Even at 100+ in direct sun at idle with the A/C cranking out max cooling only 1 fan runs 95% of the time. SO... I can't imagine a situation where running both of these full bore would not provide enough cooling for just about any application including a super high HP modified engine. The one caveat is that you will notice the drag when they kick in. Even just one fan running on my small 2.4L is definitely noticeable. The good thing is that once you build up speed they aren't needed at all so you gain something back on the highway over the stock setup. I have had these running now for 8+ years with the only problem being some wiring issues with the relay which I was able to repair though it did require soldering work on the PCB.

only worked for two days and the one fan motor went out. no way to change just motor no good!!!!!!!

I modified mine to fit my radiator (custom application) and these fans do their job very well.

Had an overheating problem in my 78 Cherokee Chief and this solved it....its trying to pull my tshirt through the grill hehe

with only 1 fan on out of the 2 it kept my turbo mustang nice and cool.

496 gen 7 in 1965 impala running at 95 degrees C in 36 degree climate with Davies Craig 0444 controller after Derale 16788 controller failed on second test