When adding an electric fan setup, it is crucial to determine which fan(s) will best work for your application. Pull type fans are more efficient and flow more air than pusher fans, which are mounted to the front of the radiator. Pusher fans are often used in cars with significant aftermarket modifications. In the summer heat, keeping your car cool is essential for comfort and safety. Electrical fans can either push air through the radiator or pull air through it. A pusher fan can obstruct airflow when a vehicle is moving, producing 75 of their published CFPM.
Fans have two styles of blades: straight and curved. If your car’s temperature gauge readings higher than expected during summer cruises, consider replacing the mechanical, factory four-blade air mover with an electric fan. Airflow will assist an electric fan, reducing load on the alternator, but there is minimal effect because the fan spins faster. Radiator fans do not blow hot air out of the engine bay but force cold air from the atmosphere through the radiator. By pulling cold air in, the fan inadvertently displaces hot air, ejecting it.
For extreme HP systems, the BMF (Big Motored Fan) series has the most airflow in the market. These fans are designed to give it their all and outperform the competition. A new 5 blade clutch fan and a shroud provide the most reliable cooling offered. The Flex-a-Lite 180 Black Magic Xtreme fan is rated at 3300 CFM and only pulls 18 amps.
Electric fans are torque limited, not speed limited. The faster the car goes, the more air goes through the radiator. Puller fans are more efficient and recommended as the primary cooling fan. To choose your electric fan, determine the minimum airflow you will need, as pusher fans can restrict airflow when the vehicle is moving.
📹 How To Choose an Electric Radiator Fan
When making big horsepower on the street, keeping your engine cool is essential. Sitting in heavy traffic with a high horsepower …
Is higher fan CFM better?
CFM (Cubic Feet per Minute) is a crucial measure for determining the right fan for a room. It determines the amount of air a fan can move through a room at its highest speed. A larger space requires a higher fan CFM for efficient cooling. Low CFM can lead to room inefficiency and warmth, even when running 24/7. Three factors that affect fan CFM are Rotations Per Minute (RPM), which measures the number of times fan blades rotate every 60 seconds.
Is 6000 CFM good for a fan?
Ceiling fan fan efficiency (CFM) can range from 1, 000 to 10, 000 CFM, with a good range for residential fans being between 4, 000 and 7, 000 CFM. Factors influencing CFM include fan blade pitch, motor power, and size. A fan with a steeper blade pitch moves more air, while a more powerful motor spins the blades faster. Larger fans also move more air, resulting in higher CFM.
Energy efficiency is another factor to consider when looking at CFM ratings. The Energy Star program certifies ceiling fans with a minimum CFM of 1, 250 on low speed, 5, 000 on medium speed, and 7, 500 on high speed, as well as a minimum airflow efficiency of 155 CFM per watt on low speed, 100 CFM per watt on medium speed, and 75 CFM per watt on high speed. If energy efficiency is a priority, look for ceiling fans with an Energy Star certification.
What is a good CFM for a car fan?
When choosing an electric fan, consider factors such as airflow, size, and compatibility with the vehicle’s radiator. For a 4-cylinder engine, a fan should deliver between 1300 and 1600 CFM, while a 6-cylinder engine should have a 2, 000 CFM range. For v8 engines, the range is 2800 to 3000 CFM for smaller cubic inches, and 4500 CFM for larger ones.
The size of the fan and its fit within the vehicle is another crucial factor. Electric fans come in various sizes, from slimmer profiles to those with different widths and heights. Matching the fan to the space is essential, but ensuring about 70% coverage of the radiator core with the fan is a general rule.
S-blade electric fans are a popular choice for those concerned with excessive fan noise. Manufacturers often push s-blade fans as being quieter when used, so if noise is a concern, consider one of these options.
How many cfm to cool a big block?
Cooling 800 HP requires about 3, 000 cfm of airflow, depending on the radiator and application. Street cars need 2, 000 cfm for a 400-500 hp engine with air conditioning, while trucks pulling trailers need 3, 000 to 4, 000 cfm depending on engine and road conditions. Diesel trucks require more airflow at lower speeds than gas-operated trucks. Many cooling fan manufacturers overstate airflow, so beware of claims of large airflow and low current draw.
It takes about 40 amps to generate 3, 000 cfm, so claims of 3, 000 cfm and 10 amp draw are not technically possible at 12 volts. For extreme HP systems, the BMF (Big Motored Fan) series offers the most airflow in the market, outperforming competitors by +20.
How many CFM electric fans?
The CFM rating for engines is dependent upon the engine size, with the lowest rating being CFM 4 cylinder and the highest being CFM 2800.
Is 5000 CFM a lot?
Ceiling fan efficiency is primarily determined by its CFM rating, which indicates how much air the fan circulates. A fan with a CFM rating of 4000 to 5000 is generally sufficient for an 8-foot room, but larger rooms or those with higher ceilings may require a higher rating. CFM can range from 1, 000 to 10, 000 CFM, but a good range for most residential fans is between 4, 000 and 7, 000 CFM. Other factors influencing CFM include the fan’s blade pitch, motor power, and size.
A fan with a steeper blade pitch moves more air, while a more powerful motor spins the blades faster, resulting in a higher CFM. Additionally, the size of the fan also plays a role, as larger fans can move more air, resulting in a higher CFM.
Is higher CFM better for cooling?
CFM (Cubic Feet per Minute) is a crucial measure for determining the right fan for a room. It determines the amount of air a fan can move through a room at its highest speed. A larger space requires a higher fan CFM for efficient cooling. Low CFM can lead to room inefficiency and warmth, even when running 24/7. Three factors that affect fan CFM are Rotations Per Minute (RPM), which measures the number of times fan blades rotate every 60 seconds.
Which fan blades move more air?
Fan blade pitch is a crucial factor in maximizing air movement, as it affects the angle of the blades in relation to the fan motor. A steeper pitch pushes more air, leading to better airflow. For example, a fan with a 15-degree blade pitch moves more air than a 10-degree pitch. Blade size and quantity also play a role in determining airflow, with longer blades sweeping a larger area and more air moving. However, having too many blades can reduce efficiency due to increased drag.
A standard home ceiling fan typically has 3-5 blades of moderate length. The power motor and RPM (revolutions per minute) are similar to the engine of a ceiling fan, with a more powerful motor generating more airflow and higher RPM.
Does a bigger fan mean more air flow?
CFM (Current Fan Model) is a measure of the volume of air a fan moves in cubic feet. The larger the fan, the more CFM it has. Lab technicians measure CFM when running at high and low speeds, then calculate the average. Airflow, measured in miles per hour (mph), is the speed of air movement. However, a bigger fan and greater CFM doesn’t always mean a cooler home. For example, at a gym, Costco, or Walmart, big fans have a higher CFM than at home, but the air you feel is from a central air system, so turning off the central air wouldn’t provide the desired coolness.
What is maximum fan air flow?
Fan air volume and static pressure are crucial factors in determining the performance of a fan. Air volume refers to the amount of air blown out, while static pressure is the force with which air pushes against the surroundings when it is stationary. The greater the static pressure, the farther the air can be blown. The maximum airflow of a fan refers to the airflow when there are no obstacles at the fan’s intake and exhaust ports. However, the fan mounted on the equipment will never reach maximum airflow or maximum static pressure.
The “airflow-static pressure characteristic” curve, also known as “P-Q performance”, shows the characteristics of a fan. A typical axial flow fan is an example of this. The maximum airflow is at the point where the static pressure is 0 Pa, and the maximum static pressure is at the point where the air volume is 0 m/min. The air volume and static pressure in the mounted state are points between these two. Combining multiple fans also changes the airflow-static pressure characteristics of the entire device.
What type of fan moves the most air?
While the size of a fan is undoubtedly a significant factor in determining air movement, it is not the sole determining factor. In order to achieve optimal airflow, it is recommended to consider a large ceiling fan with a high blade pitch, a high-quality motor, and high RPM.
📹 Is the Cooling Fan the Same as the Radiator Fan?
Is my Cooling Fan the same as my Radiator Fan? Welcome to Mercie J Auto Care, Where Compassion and Craftsmanship Come …
How do you keep your engine cool in 100+ deg weather? I run a 2002 Blazer ZR2 4.3 Vortec & live S of Houston Texas. It normally runs just shy of 210° w/ a 195° thermostat but, now when towing a small utility trailer it runs up to 220°> A bit too hot for me because it usually runs 200. I don’t like that needle on the gauge running past 210 (the 1/2 way mark) 🤟
Thanks for the article. I have a 76 cj7 jeep with a engine swap from a 88 s10 blazer (4.3 v6). I have two fans available a flexalite 188 puller single fan Or a flexalite 440 dual pusher…Which one would you recommend for my application? Both have enough room. And I hope to remove the clutch fan. Thanks Thanks.
Hey, I hope you can help or advise me. I have a Mitsubishi Montero sport 2.5 diesel(also known as shogun, pajero etc), and it overheat in uphills and slow traffic (my city is hot as hell, close to 40°C degrees often). In highway at high speeds it works perfectly. I already checked the whole cooling system (clean radiator, new thermostat, fan clutch is ok, heavy duty coolant, even new cylinder head), but it still overheat. I thought to add an auxiliar fan. However I don’t have enough room to add it at the front, because there’s a AC condenser and then an oil radiator (or transmission cooler more to the front idk). Do you think if a double straight blade fan would work installed at the front of the oil radiator? I dont know what to do 😑. Greetings from Chile!
Im not a “fan” of fan shroud . as it makes less flow when driving.. But makes the fans better when on.. on my project car, im trying to make it work the best when driving, and make the fans work as good as they can when standing still, so im thinking of installing the fans to the radiator, so the draw air tru the radiator, but not makes to mutch resistens when they are off and im driving.. Someone that know better than me, pleace tell me if im right or wrong 🙂
Engine-> direct mechanical energy for the fan Electric fan: Engine->Charging battery through alternator(energy loss)->driving elektric motor(Loss because of internal resistance) -> Electric fan is less fuel efficient “Since they are electric they do not effect your fuel economy” All the energy your car has comes from fuel, unless you regularly use some wall adapter to charge your cars battery. Otherwise where would the enegy being used to drive an electric fan come from, can’t be created from nothing. ->Your fuel is used to drive the electric fan
Sorry but this is highly inaccurate especially coming from holley, alternators on their best day are only about 50% efficient and electric motors are 80-90%. If your fan takes 80 watts of power and its motor is 85% efficient only 68 watts of power is moving air the rest goes up as heat. Also if the fan is using 80 watts of power the alternator is using 160 watts of engine power to power the fan. 160 watts is just over 1/5 of a horsepower so its not much but the wording in the article is just wrong. Electric fans do have an advantage because they only run when needed and at idle can move their full capacity of air. On a side note I have 2 16″ fans rated at 80 watts and it takes both to cool my engine (460 bbf aluminum heads cam headers etc etc) on a hot day at idle. Get a good fan shroud youll be happy you did (I didnt lol)
// “Since they are electric, they don’t effect horsepower or fuel economy.”// And this false statement comes from Holly. WOW!! Where does Holly think the power (and fuel) comes from to drive the alternator? The shaft to the mechanically driven fan is 100% efficient. The alternator/motor combo required to drive the electrical fans is less than 50% efficient. Now there are many reasons to use an electric fan (including horsepower and fuel economy), but that quoted statement is simply nonsense.
A lot of fake tech in my opinion. To say the mechanical fan is engine driven and the electric is not is nonsense. What do you think is driving your alternator, the wind from your fan? No, as more demand is put on the alternator more strain is put on the alternator, so what you think you gain from removing the fan is replaced by the added load on your alternator. Also the engine driven fan has a clutch that opens when at high speed the air rushing in wants to push the fan faster than the electrons will. This backs off in the alternator circuits and will lead to premature rectified damage. as well as fan wear and tear. It’s like having six of one or a half dozen. same thing. Mechanical fans are better, will last longer, and if you correctly match the fan clutch to the radiator It has a thermal property, will perform well for most cars. The thermal sensor on the fan clutch cycles to cutch on and off at idle as needed. Maybe there are some racing situations where the electric fan has an advantage, but for most of us, save your money, buy a new pair of sneakers. Electric fans = more sensors and parts to break down, ( if they have brushes how long will they last?), strain on the electrical system. Mechanical fans = less parts to fail and years long time and true well designed and proven systems. It’s your car, you can do whatever you want with it. And anyway, you won’t have it long. when the baby comes you’ll have to sell it for diapers, so, go ahead, have some fun. Something to chat about at the water cooler.
I have a Camaro 2015 LS and I have a two fan system (like the one on 1:24). Only one of them (the driver side one) turns on when my A/C is on. The other one does not. I only see it turn on when the heater is on. I already replaced two relays (K613 and 44. Low fan relays). In order to have both fans on at the same time, do I have to fix something else? I noticed all this because my A/C would blow at room temp or so whenever I would idle for a while but get cold again when I drive
question differences between electric radiator fan and blades fan means early cars i own a66 nova with hi performance engine SBC i use a blades fan how far from radiator can the blades be installed now a 3.3/4 inch between radiator and the blades i use a custom stainless shroud 3.1/2 inch deep same dimension of the radiator the blades are 50-50 in the opening thanks
these fans… can they run silently ? suppose i dont use them for cooling radiators but for ventilation, they seem to capable of creating static pressure and S blades for quieter operation compared to straight blade fans… I am thinking of buying a 12v version, powering it with an 4amp DC adapter and expect 28watts of “not so loud operation” that can be used as a push fan . you think that might work? the cheapest i can find is 35$+shipping so help me out if that s a good idea.
I have a 2017 Subaru Outback 3.6L R Limited. Both fans got extremely hot and melted just about everything in the Cooling Fan Shroud. they were mounted to including the fan blades. The fan motors were fused to the Cooling Fan Shroud. In less than 60,000 miles how could that happen? It left my wife stranded 50 miles from home.
1:04 “these would typically be on trucks” 2010 + NOT anymore! ALL electric fans even on all rear wheel drive vehicles. An electric motor with a lousy relay that goes out and overheats your engine once the car or truck is afew years old. Clutch lasts forever. They wanna faze out the rear wheel drives but first they wanna faze out the clutch fan because it doesn’t break down enough and they’re losing money😂