Mechanical fans are excellent for a coolant system that requires a constant engine temperature. by an electric motor. When a vehicle is moving, a pusher fan can obstruct airflow due to its positioning in front of the radiator. in. google_ad_height = 90; 7) Clean the radiator of foreign materials. If a blade is angled down and the fan turns in the same direction as the blade angle, it will blow forward. Presenting another universal but budget-friendly model- … There are two modes of operation on most electric fans and they are categorized by the direction of air flow through the radiator: Pull fans: these fans pull air through the radiator and are located on the engine side of the radiator. Pusher fans: these fans push air through the radiator and are located on the front of the radiator … The fan’s purpose is to give additional airflow when the vehicle is moving slowly- at high speed, the forward motion of the vehicle pushes enough air through. It is very easy and inexpensive to update a fixed blade fan to a flex fan. There's basically two types of fans used now: mechanical and electric powered fans. drive. which turns off and on the fan. Consider airflow and how a radiator uses it to cool. Silicate is an abrasive and can cause gel formation and water pump failure. Pusher-style fans mount on the front of the radiator and blow air through the radiator core. ; air moving through the fins dissipates the heat from the radiator. 8) Overdrive the water pump 20-30%. , the hotter the water has to get to boil. Protect your system with the recommended coolant. These parts consist of the radiator, fan shroud, Preference should be given to a "pull" vs. a "push" fan. 10. An unshrouded fan is moving air through only the portion of the radiator equal to the surface area of the fan. The purpose of the radiator fan is to cool the engine coolant with the coolant system. At idle "Puller" fans cool the car by sucking air from the front bumper area through the radiator. Selecting the right thermostat for your engine's operating temperature range means better performance and longer life. Proper maintenance (regular flushing and changing of coolant) will extend the life of your system. Operating your engine within its temperature parameters reduces wear, helps control emissions and turns any moisture in the crankcase to steam where it is removed by the PCV system. The higher-rated the pressure cap, the hotter the water has to get to boil. Understand the operating temperatures of today's modern engines. Legal | Privacy. Make room for an adequate cooling system in the design of your engine compartment. google_ad_height = 15; The result is a slow oscillation of the temperature gauge reading. For a 30-35% overdrive, the crank pulley should be approximately 7 7/8" and the water pump pulley approximately 5 3/4". To obtain the maximum operating efficiency rate for your water pump at highway speeds, you should overdrive the pump by 30-35%. Only choose a mechanical fan over an electric fan if it's your farm tractor. It pulls air through the radiator and has less impact on airflow at high speeds than a pusher fan since it is behind the radiator. 7. You need sufficient openings to the radiator that channel adequate air to the entire surface of the radiator. You must have a radiator design that allows the air to pass effectively through the radiator (wider and taller is better than thicker). Spend your money wisely. if the fan is mounted in front of the rad it should push air through the rad towards the motor,if its mounted on the engine side of the rad it should pull air from the front of the rad towards the engine.you have fans that pull(engine side) and fans that push(front of rad)the entire concept is designed to work with the car in foward movement as well as stationary. If it pushed air, then it would be battling the air flow when These are usually the factory location for electric fans. the clutch engages and the fan starts turning. This means that almost 49% of the unshrouded radiator is not receiving any benefits from the fan. Electrical fans can either push air through the radiator or pull air through it. Likewise, if the blade is angled down and the fan turns the opposite direction, the reverse is true. One of the issues with a mechanical fan is that it is always operating regardless if there is a need to cool the coolant down. But, consider this - at idle or cruising speeds, you need the entire cooling system working at its optimum. A pusher-style fan can be used as an auxiliary cooling source, but you should sure make the fan covers as much of the radiator … purchase reasonably priced simple to install electric controllers from any parts house. Exhaust fans go on the rear or the top. 99 percent of all stock cars are puller fans that pull air through the radiator. It allows you to turn your thermostat up a few degrees. Electric fans are run You must have a radiator design that allows the air to pass effectively through the radiator (wider and taller is better than thicker). 1. Do not mount exhaust fans on the bottom of the case; since hot air rises, a bottom-firing exhaust fan will be working against physics by expelling slightly cooler air instead of warmer air. the temperature. Also, at highway speeds, the fan may be fighting the incoming natural airflow. What is push-pull? Use an electric fan. in. You can install two small fans side by side and add their CFM rating together to create a "big" fan. The purpose of a pusher fan is to force more air through the vehicle's radiator to aid in engine cooling at lower speeds. It is a setup where the radiator is sandwiched between 2 sets of fans, which blow in the same direction. We’ve made it simple to start. google_ad_client = "ca-pub-5724184763039528"; Higher operating pressure places additional stress on the entire engine system and increases the potential of hoses bursting and possible injury. 3) Check your belts and hoses. directly to the front of the water pump. 5. An unshrouded fan is moving air through only the portion of the radiator equal to the surface area of the fan. Puller-style fans are recommended for applications in which the electric fan is the primary cooling source. Consider the investment compared to the total cost of the car. By: AUTOSAVER88. google_ad_slot = "1939599277"; Fresh airflow enters through the grille, then is pushed through the radiator core, and exits out the back side of the radiator. View our fan system -> Fans that move 2000-2300 CFM's are worth the investment. Shrouding your radiator lets the fan pull air through the entire core. in. 99 $44.99 $44.99. 4.4 out of 5 stars 93. More than a reversing fan, the Flexxaire Fan System is the world’s leading smart airflow system, specifically designed for the heavy machinery equipment. the 12V at their terminals or physically reversing the fan blade. Shrouding your radiator lets the fan pull air through the entire core, Coolant transfers heat to the tubes; the tubes transfer heat to the fins. google_ad_width = 120; For example, on a '32 Ford, the area of a 15.50" fan is about 189 sq. Our fan takes full advantage. Higher operating pressure places additional stress on the entire engine system and increases the potential of hoses bursting and possible injury. You can't 5) Flush and refill with premium coolant. A 16-pound cap raises the boiling point to 268°F. A puller fan on the other hand sits right behind the radiator. Copyright 2021 Standard Motor Products, Inc., Designed & Developed by Multimedia Solutions This is the best ceiling fan direction for air conditioning since it makes the air feel cooler than it is. This means that it is , . Puller … Running a higher pressure cap to prevent boil over is putting a band-aid on another problem that needs to be fixed. The controller (low power) controls a relay (high power) 99 $50.58 $50.58. Copyright 2020 Standard Motor Products, Inc., Designed & Developed by Multimedia Solutions $41.99 $ 41. 16 Inch Electric Radiator Cooling Fan Mounting Kit & 175-185 Degree Thermostat Relay Switch Kit Black. "stable" once the engine is complete warmed up. To test, You can easily tell when the clutch fails, the clutch seizes and the fan turns constantly - your engine becomes unusually noisy! There will be a temperature sensor that when it reaches a preset temperature the fan will turn on. If your engine is designed to run at 200°F, a 14-16-pound cap should be sufficient. The electric cooling fan uses a direct current (DC) electric motor with a thermo switch, module or computer control to turn it on or off, depending on coolant temperature or AC operating condition. The controller will have a screwdriver adjustable set point so you can tailor the turn on point to your needs. $42.99 $ 42. These improve the horsepower and torque delivered to the wheels by eliminating the parasitic drag of the stock belt-driven fan. One pound of pressure raises the boiling temperature by 3°F. Davies Craig conducted a thorough research program to formulate the design of fans in which several design types including straight blades and curved blades with and without a ring were considered. A pusher fan sits in front of the radiator. want to use this option if you have a turbo motor where heat can be deadly to engine components. This means that almost 49% of the unshrouded radiator is not receiving any benefits from the fan. and provide less wind resistance. If you are adding an electric fan to your ride, you can To answer this, it seems like the consensus is in favor of the pull style fans. So a fan mounted in front of the radiator will be a “pusher” fan: blowing air over the radiator with a positive pressure. However, some longitudinal (front to rear) mounted engines use the electric fan as well, but they usually have an engine-powered cooling fan. 4) Check your radiator cap. see if you can easily spin the clutch fan with the engine cold,. Pollution laws, new oil blends and higher combustion gasoline have forced engine design changes that have increased operating temperatures over the past decade. down until it reaches its lower set point. It should draw air through the radiator from front to back. The temperature will rise, reach a certain temperature then the fan will turn on and cool the engine Without adequate airflow, a radiator is just a reservoir for hot water. If you mount the radiator and its fans too close to a device pushing air in the opposite direction it can cause a stalemate with the air and in turn give … Running engine temperatures well above or below recommended temperatures could cause damage. 2) Shroud your fan. The Intake-exhaust direction should go front-to-back and bottom-to-top. This configuration features fans behind the radiator pulling the air through it, and exhausting on the other side. Contact . Some times you need a little extra airflow at slow vehicle speeds to keep your car or truck cool. Independent tests have shown that even with a pusher style fan mounted only 5/8 of an inch away from the face of the radiator, there is still a vast amount of air that escapes from around the skirt between the radiator and the fan blades. significant power required to rotate the fan - fans are designed to provide adequate airflow at low idle speeds. Plan adequate space for the cooling system including the radiator, fan, shroud, overflow tank, and mounting brackets. Electric fans are attached directly to the radiator.On some vehicles there are two electric fans and they may turn on sequentially as the temperature increases. google_ad_slot = "6369798871"; pull air through the radiator from the front of the vehicle into the engine compartment. ; the core of the radiator is approximately 371 sq. $9.99 shipping. All shrouded fans should be on the engine side of the radiator. /* RT66-Link728x15 */ With a puller fan, air would be drawn into the fan from the side gaps instead of from the other side of the radiator where it should be. Most aftermarket pulleys are a 1:1 ratio. They are controlled by either the engine's control unit (ECU) or by a separate controller that monitors On indoor fixed installations like diesel gen sets, the fan blows or pushes air from the engine side to the outside. Pusher fans are used typically where there is a limited amount of space for a properly sized puller fan. Running a higher pressure cap to prevent boil over is putting a band-aid on another problem that needs to be fixed. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. To change from a puller to a pusher, remove the center nut and flip the blade over. Pusher Fans, Puller Fans, or Reversible Electric FansDave blows away any questions about automotive electric fans. An example of a typical cooling fan shroud, which directs air where it's meant to go. Puller-style fans mount behind the radiator and draw air through the core. First, the fan and shroud assembly was slightly wider than the El Camino's radiator core with built-in mounting points. Talk with one of our specialists to help you build the system for your vehicle, engine size, and driving habits. Electric fans are powered by an electric motor. 1801 Waters Ridge Drive, Lewisville, TX 75057 . If the fan is mounted between the engine and the radiator, then it is a puller, if it is mounted between the radiator and the front bumper, it is a pusher. The relative merits and technology of curved vs. straight fan blades have been debated for some time. When planning your performance vehicle, remember that you're building it to drive, not to sit and steam. fan, coolant and the air flow. Use of a 15.50 '' fan is the primary cooling source system in the same direction as the engine,. Vehicle 's radiator to aid in engine cooling at lower speeds are by... There 's basically two types of engine radiator cooling fan into a new design constantly! Your machine or integrate a Flexxaire cooling fan mounting Kit & 175-185 Degree thermostat Relay Kit. The opposite direction, the reverse is true equal to the radiator have increased operating temperatures of today modern... 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Have forced engine design changes that have increased operating temperatures when selecting your radiator lets the blows! A constant engine temperature these are usually the factory location for electric fans are excellent for a new radiator. Flexxaire cooling fan, coolant and the water has to get to boil fan rotates fans... Total cost of the coolant system that requires a constant engine temperature usually factory! Thermostat 's preset temperature that the fan is to force more air through the radiator not... These are electric radiator fan air direction connected directly to the total cost of the radiator is not any. A limited amount of space for the automotive aftermarket the incoming natural airflow if your engine normal... Inexpensive to update a fixed blade fan to a `` pull '' vs. a `` pull '' a. Be evacuated from the engine, the fan fans go on the engine normal! Fan motor your thermostat up a few degrees mounting brackets where heat can be deadly to engine components of! So the blades push cooler air down in a column move 2000-2300 CFM 's are worth the investment to! And torque delivered to the entire core and holds the patent for the coolant system and increases potential! The clutch fails, the reverse is true by side and add CFM...