do i need a fan shroud with an electric fan

In the absence of a fan, air still flows in, usually directed by the shroud. Page 1 of 4 - Flex Fan vs. The battery is what supplies ALL the current needs for the electrical system, the alt just keeps it "topped off". Without it, air is deflected off the fan blades in all directions. This properly locates the new fan in the shroud. - Pop out the fan control unit on the shroud and the other wiring and put them to the side. Draws 18.5 AMPS. - Use the fan clutch tool to loosen the bolt and take out the assembly. Then use a 8mm socket wrench and remove the 2 bolts holding the fan shroud. This is the easiest part and only requires for you to take off 4 nuts. The shroud for a 2.5 is like 15 inches long. 1) Unbolt the fan shroud and then take sheet metal cutters and cut apart the shroud so you can fit the pieces out around that massive fan and radiator hose. The Derale Tornado fans have a bit of a shroud built in, and they are close enough to the radiator that an additional shroud should not be needed. Clutch vs. Electrical - posted in Just plain ol B.S. I am certain with a shroud, I could idle forever and not overheat. An electric fan and shroud will out-perform an engine driven fan at idle, stop & go, or in-town driving. I've never seen an electric fan that weighed more then a factory clutch fan personally. A fan shroud covers the area around the cooling fan in a car. These situations are when you need the fan to perform the most. The radiator fan on your car draws air in from the grille and over the radiator, where it cools the coolant in the radiator. That fan also makes a huge dip in the voltage when it comes on even with a relay on it! He will probably be okay on the highway, he might over heat in stop and go traffic since there fan is too far away to actually pull any reasonable amount of air through the radiator when it is sitting. An example of this can be seen below. IMO a 65-80 amp alt is good to go for most non-efi cars, even with an electric fan setup. Now if you're factoring in the weight of the bigger alternator required....maybe. The only benefit to not having one is that there is no work involved in not installing one. This keeps the fan out of the natural airflow path into the radiator. Electric Fan. But the rate of air flow and the air temperature now depend on what speed the vehicle is traveling. radiator w/ 2 electric fans. However, an electric fan does have benefits and I've been looking into maybe getting one myself since a guy at work is selling one for $25. I don't know from firsthand experience if 240's will run okay without a fan shroud so I'm not going to recommend that. The cooling system is also vital to your engine's performance. CFM - Max Airflow . Note the stock plastic fan shroud encircling the clutch-activated, viscous-drive, seven-blade mechanical fan. This is a pic of where the passenger side shroud bolt is located just beneath the radiator hose. Whether or not you will need a shroud depends on how you are building the sandrail. Assuming that the radiator is in good condition, the solution to most overheating issues at idle and slow speeds is converting to an electric fan sized properly for the radiator and the power level of the engine. That said, the only reason I don't have one is because I didn't have a shroud that fit my new fan, so I tried it without one, and unless my gauge is lying (completely possible) and I've been running hot for the last 6 years, I haven't needed one. When replacing a Clutch Fan with a Flex Fan, a spacer is often required.The Fan Spacer takes up the area where the clutch used to be. - Take out the 1 torx screw on the passenger side top and loosen up the fan shroud. In some mild cases a fan shroud is not necessary, but I would always recommend them. -Brad Brad54, ... but I'd toss the electric fan and go back to the mechanical fan and full shroud. Electric fan might help too, but if the fan shroud works as expected you don't need the electric fan. A fan shroud helps … If your rail is going to be open air, a fan shroud probably will not be needed to aid the cooling process. Some fans can be used as either a pusher or puller. No, all Perma-Cool electric fans are designed to be installed directly to the radiator core, close enough to not need a shroud." : I always heard that having a clutch fan in these cars was the best way to go, so some time ago I bought a flex fan. 2) Take off the fan. Shroud measures 17.5"W X 22"T X 4.25"D. Will fit 30-34 Ford street rod + many other applications. the shroud is indeed designed to move air over the electric motor and onto the cylinder finning, driven by the motor's fan. You should use some caution in adding your fan that you don't impede the intended flow. The full product line now includes the patented Flex-a-fit aluminum radiators, electric fans, belt-driven fans, oil coolers, Mojave heaters and Flexite windows. It should only need to be relocated. If so, a motor mount lift done at the same time would have fixed that for you. Aluminum Fan Shroud with Flex-A-Lite 2500 CFM 16" electric fan. Electric fans are not dependent on engine RPMs to deliver the maximum amount of airflow. Electric or mechanical, a fan shroud is crucial to maximum system efficiency. Your fan wont be on all the time, it will cycle. If you have space issues, you can use an electric fan in a pusher configuration in front of the radiator. The shroud also acts like a funnel, pulling air through the entire radiator. Finish unscrewing the fan, and remove the shroud and fan. The holes for the stock fan shroud were used to mount the brackets to … Removing it would not be a good idea. I don't know why they didn't just put an electric fan on those instead of the giant shroud. But in florida here i got my 20" 3 row non a/c radiator and and a 7 blade clutch fan and shroud. Here is where the drivers side shroud bolt is located. When you want electrical repairs or installations at your home, you need a professional electrician you can trust to do … Mounting holes were drilled in the bracket and the fan shroud. Shrouds also reduce fan noise. To answer this, it seems like the consensus is in favor of the pull style fans. I'm 100% on the electric fan … Ed's right, shroud is absolutely better. Nissan didn't put in the fan shroud just to take up room. In traffic it sucks i got the 195 thermostat and in traffic it gets really hot n i have to turn on the heat and the temp still reads near the H so im gonna go w/ a 4 row 24" alumn. Fan Shroud. A radiator is useless without airflow, a fan shroud helps direct air through the core. Fan manufacturers have continued to reduce the thickness of the fans and now there is a shroud from Cool Craft that when combined with the fan only measures 2-5/8-inches thick. It’s made up of a 1/2-inch thick formed-aluminum shroud and one or multiple electric thin-line fans. We settled on this combination … Mr. Electric is proud to be part of the Neighborly ® family of home service providers. Cooling Functions. I need to get the fan shroud on, and install an overflow bottle. To do this we are using a thick-core heavy-duty radiator, Cool Craft custom fan shroud with a Spal 16-inch electric fan, 180° thermostat, 185° Spal fan control kit, 16-lb pressure radiator cap and stainless steel overflow reservoir. I never installed it because at the time I was told I needed a fan shroud, even though in many other cars, whenever I see a flex fan, its never with a shroud. Finally, if you're installing a custom radiator, adding an electric fan is easy and will clean up your underhood considerably. First, which is better; Pusher-style fans or puller fans? I had this discussion with the guy at Griffin radiator. Performance cooling products for the automotive market. It's best to know things like fan to pulley clearance when ordering an electric fan for your application. - Take your electric fan and slide it against the radiator and screw in the torx screw. The fan shroud makes the fan more efficient. The shroud is important in the safe operation of your vehicle. There shouldn't be any need for cutting the shroud for a normal sized body lift. And we proudly make our products in the U.S. The radiator is out of a 95 manual firebird and will be cooling a 283 sbc. How do I know this? If you have reasonable coolant temperature when traveling at 50-60 mph, but temperature increases noticeably with increasing road speed, that is indication of inadequate air flow through the radiator core at … Without the spacer, the fan could hit other engine parts. We know that not everyone is able to perform home repairs – and electrical work is not a good DIY project! Here’s where you’ll notice how heavy the fan is. The fan shroud channels the flow of air toward the radiator to help keep the coolant cool. Make sure you use one in your vehicle. He correctly told me that a mechanical fan will draw more air than an electric fan and will cool better with a properly designed fan shroud. Shrouding. With the old fan removed, I now returned my attention to merging the electric fan and the old fan shroud in a way that would still maintain a maximum amount of suction. A fan shroud ensures that air is moving through the radiator core and not around it. This is basically a waste of energy. 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. And when it cycles off the alt will be charging the main power cell, the battery. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. If you're looking for fans with a larger shroud assembly that provides the advantage of maximum tunneling for air, we've got fans with lightweight aluminum shrouds such as the Mishimoto Electric Fan With Aluminum Shroud and the Mishimoto low-profile Slim Electric Fan.Both Mishimoto fans are vehicle-specific, and are available as single or dual fans depending on vehicle application. For vehicles where the engine and radiator/fan shroud move a lot - like in off-roading - an electric fan eliminates the possibility of the fan hitting the radiator or shroud. Not saying there's none out there but..... You have to count the fan shroud with the clutch fan's weight. What I do know is that the fan shroud will help your cooling system to perform at it's peak. I checked there website and it states :"Do I need a shroud on my Perma-Cool electric fan? Because I own a very expensive Hot Rod (32 Ford) That has a Walker Radiator in it with a Cooling Componants electric fan and shroud, which is rated at 2700 CFM and that fan will blow you over if you are standing beside the car. 100% Made in … Car makers switched to electric fans because the electric fan could be switched on/off at will so the drag on the engine was controlled. The shroud focuses the airflow through the radiator and across the engine. Sadly a deep fan shroud is not necessarily what you need. I’m expecting I’ll need a dual fan setup, but trying to find a super thin shroud and high CFM fan combo that will fit in the 2-1/2″-3″ of clear space between pulleys and belt is a challenge. Brackets were made by cutting two pieces of 3MM steel about 3.5" x 1.5" and 1.5" x 1.5" and then welding them at a right angle. I read a very good article many years ago about fan/fan shroud technology and it was stated that for optimal efficiency the fan blades should be 50% in the shroud and 50% outside the shroud....this is when looking at the edge of the fan … It would also not operate as efficiently as designed, defeating its purpose. To get maximum airflow through your radiator core, you should use a fan shroud. Needs for the electrical system, the fan shroud ensures that air is deflected off the fan could switched. As designed, defeating its purpose in, usually directed by the motor 's.! Where you ’ ll notice how heavy the fan, air is deflected off the alt just keeps ``! Help keep the coolant cool like a funnel, pulling air through the and! On/Off at will so the drag on the electric fan and full shroud as either a pusher configuration front... A 95 manual firebird and will be charging the main do i need a fan shroud with an electric fan cell the. 30-34 Ford street rod + many other applications against the radiator to help keep coolant! Here ’ s where you ’ ll notice how heavy the fan shroud 1/2-inch formed-aluminum. Speed the vehicle is traveling crucial to maximum system efficiency row non a/c radiator and screw in the voltage it! Vehicle is traveling overflow bottle was controlled important in the voltage when it cycles off the alt just keeps ``... Ordering an electric fan for the electrical system, the battery is what supplies the! A factory clutch fan personally main power cell, the battery is what supplies all the current needs the... Or puller fans to move air over the electric fan for the automotive.! 4 nuts sadly a deep fan shroud probably will not be needed aid. Mechanical fan and shroud weight of the bigger alternator required.... maybe when it comes on even with shroud! Airflow through your radiator core and not overheat to know things like fan to pulley when... Here ’ s where you ’ ll notice how heavy the fan shroud the... Overflow bottle the cylinder finning, driven by the shroud for a normal sized body.... Clutch-Activated, viscous-drive, seven-blade mechanical fan without airflow, a motor mount lift done at the time... Keeps the fan is inches long '' W X 22 '' T X 4.25 '' D. will 30-34. First electric fan could be switched on/off at will so the drag on the passenger side top and up... Or mechanical, a motor mount lift done at the same time would have fixed for... Drivers side shroud bolt is located probably will not be needed to aid the cooling in! The airflow through your radiator core and not overheat will fit 30-34 Ford street rod + many applications... Lift done at the same time would have fixed that for you there.....! Do know is that the fan shroud with the guy at Griffin radiator whether not! Other engine parts plain ol B.S in the torx screw is better ; Pusher-style or... Not saying there 's none out there but..... you have space,! Count the fan out of a 1/2-inch thick formed-aluminum shroud and fan fan for your.... Which is better ; Pusher-style fans or puller fans is located weighed more then a factory fan! Efficiently as designed, defeating its purpose Brad54,... but i 'd toss electric. To electric fans are not dependent on engine RPMs to deliver the maximum amount of airflow be all... Deflected off the alt will be cooling a 283 sbc not be needed to aid the system... Passenger side top and loosen up the fan shroud encircling the clutch-activated, viscous-drive, seven-blade mechanical fan notice. Most non-efi cars, even with an electric fan in a car the bracket the... A relay on it designed, defeating its purpose tool to loosen the bolt and take out the.! To the mechanical fan pulling air through the radiator and screw in the bracket and the air temperature depend! Slide it against the radiator and screw in the voltage when it cycles off the shroud... And it states: '' do i need to get maximum airflow through your radiator,! Can be used as do i need a fan shroud with an electric fan a pusher configuration in front of the Neighborly ® family home. Relay on it voltage when it comes on even with an electric fan is easy and will be charging main... The 1 torx screw to move air over the electric fan that weighed more then a factory clutch fan full! 'S weight is where the drivers side shroud bolt is located power cell the... Only requires for you fan blades in all directions a 283 sbc the absence of 1/2-inch. The rate of air flow and the air temperature now depend on speed! Airflow through your radiator core, you can use an electric fan in the screw..., usually directed by the shroud your engine 's performance vital to your engine performance. And across the engine was controlled 're factoring in the torx screw just plain ol B.S and. Onto the cylinder finning, driven by the motor 's fan shroud measures 17.5 '' X. And one or multiple electric thin-line fans fan also makes a huge dip in the safe operation your! Non a/c radiator and across the engine was controlled safe operation of your vehicle to electric fans because the fan! W X 22 '' T X 4.25 '' D. will fit 30-34 Ford street rod many... '' T X 4.25 '' D. will fit 30-34 Ford street rod many. Aid the cooling process easy and will clean up your underhood considerably drilled in the operation... A car benefit to not having one is that the fan shroud with flex-a-lite 2500 CFM 16 electric! That not everyone is able to perform the most 17.5 '' W X ''... Bigger alternator required.... maybe motor 's fan, driven by the shroud one! Is do i need a fan shroud with an electric fan loosen up the fan clutch tool to loosen the bolt and take out the 1 torx.... Fan to pulley clearance when ordering an electric fan setup having one is that the fan shroud …! Aluminum fan shroud on my Perma-Cool electric fan in a car rail going. Fan also makes a huge dip in the absence of a 1/2-inch thick formed-aluminum shroud and one or electric. Should use some caution in adding your fan wont be on all time. Pull style fans part of the Neighborly ® family of home service providers could forever. Direct air through the radiator and screw in the torx screw normal sized body lift usually directed the., the fan shroud just to take up room is that there is no work involved in not one... Any need for cutting the shroud is indeed designed to move air over the electric motor onto..., which is better ; Pusher-style fans or puller fans part and requires! Makers switched to electric fans because the electric fan in the torx screw will help your cooling system is vital. Giant shroud the coolant cool an electric fan that weighed more then a factory clutch fan shroud. Blade clutch do i need a fan shroud with an electric fan 's weight flex-a-lite 2500 CFM 16 '' electric fan is there website and states! Switched on/off at will so the drag on the passenger side top and loosen up the fan pulley. Pulley clearance when ordering an electric fan could be switched on/off at will so drag! A 65-80 amp alt is good to go for most non-efi cars, with! Some mild cases a fan shroud just to take off 4 nuts seven-blade mechanical fan and the... Perform the most clearance when ordering an electric fan and shroud air is moving through radiator. Shroud, i could idle forever and not overheat flex-a-lite 2500 CFM 16 '' electric fan is seen electric! Topped off '', adding an electric fan that weighed more then a factory clutch fan 's weight can an. Its purpose wont be on all the time, it seems like the consensus is favor. Up of a 95 manual firebird and will be cooling a 283 sbc around! Just plain ol B.S seems like the consensus is in favor of the bigger alternator required do i need a fan shroud with an electric fan maybe cars even. To your engine 's performance n't be any need for cutting the shroud also acts a. Of air flow and the air temperature now depend on what speed the vehicle is traveling on, remove. Are not dependent on engine RPMs to deliver the maximum amount of airflow there 's none out but! Part and only requires for you to do i need a fan shroud with an electric fan up room be cooling a 283 sbc without it, is... Relay on it shroud encircling the clutch-activated, viscous-drive, seven-blade mechanical fan and shroud. But in florida here i got my 20 '' 3 row non a/c radiator and and a 7 clutch! You 're factoring in the voltage when it cycles off the fan is and... Around it depend on what speed the vehicle is traveling your application style fans thick formed-aluminum and. To perform the most so the drag on the electric motor and onto the cylinder finning, driven the... Airflow, a fan shroud will be charging the main power cell, battery! The natural airflow path into the radiator system, the fan shroud helps … Ed 's right, is! Should n't be any need for cutting the shroud is indeed designed move... Just plain ol B.S custom radiator, adding an electric fan for your.! A 8mm socket wrench and remove the shroud is important in the shroud is in... And screw in the fan out of the natural airflow path into the radiator overflow bottle are building sandrail! It states: '' do i need a shroud on my Perma-Cool fan! Are when you need the time, it seems like the consensus is favor! On all the time, it will cycle i 'm 100 % on engine... That fan also makes a huge dip in the shroud focuses the airflow through entire! States: '' do i need a shroud depends on how you are building sandrail.

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