the shroud is indeed designed to move air over the electric motor and onto the cylinder finning, driven by the motor's fan. 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. That fan also makes a huge dip in the voltage when it comes on even with a relay on it! radiator w/ 2 electric fans. What I do know is that the fan shroud will help your cooling system to perform at it's peak. Electric Fan. Electric or mechanical, a fan shroud is crucial to maximum system efficiency. If you have space issues, you can use an electric fan in a pusher configuration in front of the radiator. It's best to know things like fan to pulley clearance when ordering an electric fan for your application. 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. Shrouds also reduce fan noise. But the rate of air flow and the air temperature now depend on what speed the vehicle is traveling. How do I know this? 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. Removing it would not be a good idea. I'm 100% on the electric fan … These situations are when you need the fan to perform the most. Without it, air is deflected off the fan blades in all directions. It should only need to be relocated. 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. 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. 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. Mr. Electric is proud to be part of the Neighborly ® family of home service providers. A radiator is useless without airflow, a fan shroud helps direct air through the core. First, which is better; Pusher-style fans or puller fans? Nissan didn't put in the fan shroud just to take up room. A fan shroud helps … Mounting holes were drilled in the bracket and the fan shroud. It’s made up of a 1/2-inch thick formed-aluminum shroud and one or multiple electric thin-line fans. 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. This is a pic of where the passenger side shroud bolt is located just beneath the radiator hose. Not saying there's none out there but..... You have to count the fan shroud with the clutch fan's weight. Shrouding. 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. Electric fan might help too, but if the fan shroud works as expected you don't need the electric fan. Whether or not you will need a shroud depends on how you are building the sandrail. 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. Page 1 of 4 - Flex Fan vs. An electric fan and shroud will out-perform an engine driven fan at idle, stop & go, or in-town driving. 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. Finish unscrewing the fan, and remove the shroud and fan. We settled on this combination … This keeps the fan out of the natural airflow path into the radiator. Ed's right, shroud is absolutely better. Then use a 8mm socket wrench and remove the 2 bolts holding the fan shroud. Cooling Functions. Finally, if you're installing a custom radiator, adding an electric fan is easy and will clean up your underhood considerably. 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. 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 need to get the fan shroud on, and install an overflow bottle. The shroud for a 2.5 is like 15 inches long. A fan shroud ensures that air is moving through the radiator core and not around it. Draws 18.5 AMPS. 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. 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. 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. - Take out the 1 torx screw on the passenger side top and loosen up the fan shroud. - Take your electric fan and slide it against the radiator and screw in the torx screw. 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 … Some fans can be used as either a pusher or puller. This properly locates the new fan in the shroud. The battery is what supplies ALL the current needs for the electrical system, the alt just keeps it "topped off". Note the stock plastic fan shroud encircling the clutch-activated, viscous-drive, seven-blade mechanical fan. 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. I've never seen an electric fan that weighed more then a factory clutch fan personally. This is the easiest part and only requires for you to take off 4 nuts. The radiator fan on your car draws air in from the grille and over the radiator, where it cools the coolant in the radiator. The shroud is important in the safe operation of your vehicle. The fan shroud channels the flow of air toward the radiator to help keep the coolant cool. If your rail is going to be open air, a fan shroud probably will not be needed to aid the cooling process. The shroud focuses the airflow through the radiator and across the engine. : 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. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. Sadly a deep fan shroud is not necessarily what you need. And when it cycles off the alt will be charging the main power cell, the battery. - Use the fan clutch tool to loosen the bolt and take out the assembly. It would also not operate as efficiently as designed, defeating its purpose. We know that not everyone is able to perform home repairs – and electrical work is not a good DIY project! 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. Aluminum Fan Shroud with Flex-A-Lite 2500 CFM 16" electric fan. 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. The radiator is out of a 95 manual firebird and will be cooling a 283 sbc. You should use some caution in adding your fan that you don't impede the intended flow. I checked there website and it states :"Do I need a shroud on my Perma-Cool electric fan? Your fan wont be on all the time, it will cycle. Fan Shroud. 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. Electric fans are not dependent on engine RPMs to deliver the maximum amount of airflow. To get maximum airflow through your radiator core, you should use a fan shroud. I don't know why they didn't just put an electric fan on those instead of the giant shroud. To answer this, it seems like the consensus is in favor of the pull style fans. A fan shroud covers the area around the cooling fan in a car. CFM - Max Airflow . Make sure you use one in your vehicle. The cooling system is also vital to your engine's performance. Clutch vs. Electrical - posted in Just plain ol B.S. 2) Take off the fan. 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. This is basically a waste of energy. 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. The holes for the stock fan shroud were used to mount the brackets to … The shroud also acts like a funnel, pulling air through the entire radiator. There shouldn't be any need for cutting the shroud for a normal sized body lift. Here is where the drivers side shroud bolt is located. No, all Perma-Cool electric fans are designed to be installed directly to the radiator core, close enough to not need a shroud." 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 … Without the spacer, the fan could hit other engine parts. 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. Here’s where you’ll notice how heavy the fan is. If so, a motor mount lift done at the same time would have fixed that for you. But in florida here i got my 20" 3 row non a/c radiator and and a 7 blade clutch fan and shroud. The fan shroud makes the fan more efficient. In the absence of a fan, air still flows in, usually directed by the shroud. When you want electrical repairs or installations at your home, you need a professional electrician you can trust to do … 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. An example of this can be seen below. Performance cooling products for the automotive market. 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. - Pop out the fan control unit on the shroud and the other wiring and put them to the side. I had this discussion with the guy at Griffin radiator. And we proudly make our products in the U.S. Shroud measures 17.5"W X 22"T X 4.25"D. Will fit 30-34 Ford street rod + many other applications. I am certain with a shroud, I could idle forever and not overheat. 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