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26-1/4" x 15-1/2" x 2-5/8". Dual S-blade, shrouded, 12V nylon puller fan with speed controller helps provide consistent cooling. Draws power from the electrical system, freeing the engine belt for improved performance and fuel economy.
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Specs:
Once you've decided that an electric fan is right for your application, you need to determine a few things before chosing a fan. First, you need to be aware of your engine's airflow requirements. Typically, a 4-liter engine needs a fan that can move a minimum of 1,250 cubic feet per minute (CFM). A V6 requires 2,000 CFM, and a V8 should have 2,500 CFM of airflow.
Second, you need to determine what size fan will fit your application. Measure the finned surface of your radiator core to determine what size fan will fit under your hood. The most important aspect of choosing an electric fan is making sure that it covers as much of the finned radiator surface as possible. It is recommended that at least 70 percent of the core is covered so that you get maximum cooling from the fan. You should also take the necessary measurements to ensure you have enough clearance around the fan.
Lastly, if your application requires even more airflow and you have enough space under the hood of your vehicle, you can mount an additional fan on the same side of the radiator as long as the calibration of the second fan does not interfere with the performance of the first.
A quality radiator fan can dramatically improve your engine's cooling capabilities and potentially boost its performance. Flex-a-lite's electric fan wires directly into your vehicle's 12V system so that is can provide consistent cooling. This makes it ideal for vehicle's that often overheat, for driving in hot climates, and for off-road applications. And because the fan draws power from your battery - unlike a belt-driven fan - it can also help improve your engine's performance and fuel economy.
This puller fan sits behind your vehicle's radiator (on the engine side) and drags incoming air through the vents. Because it is positioned behind the heat exchanger, the fan does not impede airflow created by the forward motion of the vehicle. The air being pulled in lowers the temperature of the coolant inside the radiator and helps prevent engine overheating.
Unlike an electric fan, the performance of a belt-driven fan is tied directly to the rotational speed of your engine. The fan goes as fast or as slow as the engine's serpentine belt or V-belt. This means that when engine rpm is low, such as when you are idling, the fan has a limited amount of cooling potential. An electric fan, however, provides consistent cooling. Because an electric fan uses vehicle's the battery as its power source, it can provide significant cooling during periods of low rpm, such as when you are sitting in traffic or driving slowly. And because the electric fan operates independently of the engine belt, there is less stress on the moving components of your engine and they will last longer.
This fan has two sets of blades to provide a greater amount of cooling power. The wider profile also covers an increased area of the radiator surface and can pull air across a greater amount of the radiator core. This leads to more efficient cooling than would be possible with just a single electric fan, which is perfect for vehicles that have been heavily modified under the hood.
A one-piece, glass-reinforced nylon shroud surrounds the fan and increases its efficiency. Air currents take the path of least resistance, so the shroud acts as a funnel by concentrating the air across the radiator fins.
This fan has S-shaped blades, which generally operate at a reduced noise level compared to straight blades at the expense of pulling in slightly less air. Unless your vehicle already has significant issues with overheating, S-shaped blades will provide the airflow necessary to keep the engine coolant at a reasonable temperature.
The variable speed controller contains a probe that inserts into the radiator core and detects a set temperature of your choosing between 180 and 240 degrees. Once the radiator reaches the set temperature, the fan engages at 60 percent of its full speed. As the temperature of the engine increases, so will the speed of the fan.
The variable speed controller also allows the engine to warm up faster than it would with a belt-driven fan because the fan will not begin spinning as soon as the vehicle starts up. Instead, the fan will engage as soon as the radiator coolant warms to your set temperature.
You can also mount a switch (FLX31148 - sold separately) in your vehicle's cab that allows you to turn the fan on and off at will. This ability is helpful in off-roading situations when you may need to cross a shallow body of water.
After removing your vehicle's existing fan and shroud (if applicable), position the electric fan behind the radiator and make sure the blades will not come into contact with obstructions as they spin. Once you determine where the fan will sit, use the included mounting hardware to secure the fan against the radiator. Next, pass the thermostat probe into the radiator core near the upper hose.
When the fan is secure, run the wires to their respective power sources in your vehicle's fuse box. Once all the wires are routed, install the provided knob onto the thermostat shaft located on top of the fan and adjust the temperature as desired.
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