If you are unsure, ask an industry expert what they recommend, but be sure to provide them all the details so the answers you receive direct you to the right choice. Please carefully consider which fan or shroud assembly will provide you the best cooling options. Your fan and shroud choice is important in your vehicles operation. Weigh out which cooling fan type is best for you.Įlectric fans have advantages, but so do engine-driven fans. Whatever your choice, the right fan and shroud will do the job! Have engine driven fans and 30% choose electric. This may require you to choose a low-profile fan option. If your engine compartment is cramped and the air passing through the radiator will have a difficult time exiting, you may choose a MAX (High CFM) fan as an alternative. Fan shroud houses fan blades that secure it in place and keeps it from damaging other engine components With fan shrouds holding fan securely in position. If most of your driving is at low speed, consider our MAX (High CFM) fans with shrouds, or add an electric “pusher fan” to supplement your engine driven fan shroud. Low engine or driving speed contributes to heat build up and the low speed offers little RAM effect of air flow as you would experience at highway speed. There are however a few points to consider, which may affect your final decision. It’s not that difficult to accomplish – see the accompanying photos for a closer look.Generally, both Electric and Engine Driven Fan Shrouds are effective for cooling. There’s more too: If you take the time to effectively seal any gaps between the fan shroud and the radiator, cooling can improve. The shroud simply allows the largest volume of air to be pulled through the rad (typically in a pull through application). Typically, this is accomplished by way of an integral shroud surrounding the electric fan. Specs are as follows:Īll of the above have a low amp draw, but Davis points out that one of the other secrets to properly cooling a high performance car is to effectively seal the radiator to the fan. Davis offers a trio of fans – 12-inch, 14-inch and 16-inch diameters. This might be a good choice for a car that's either blessed with a cooling dilemma or one that sees double duty as a weekend racer.Ĭompanies such as Ron Davis Racing Products have spent considerable time researching cooling fans with these criteria. A good example is a pickup truck with a factory towing package. This arrangement is particularly useful if heavy cooling tasks are mandated by the application. Sometimes electric fans are used in conjunction with an engine driven clutch fan (typically, an electric pusher fan mounted ahead of the rad). Motor vehicle manufacturers have used both configurations in modern passenger cars and light trucks, although puller fans are the most common. In the case of electric fans, you usually have two options: A pusher fan and a puller fan. So where do you find shrouds for older cars? That’s simple too: The restoration aftermarket is loaded with quality reproduction shrouds for all sorts of applications. The bottom line is simple: If you don't run a proper shroud, you're only asking for overheating grief. If the shroud is not present, it creates a considerable amount of "dead" space behind the radiator that in turn destroys the effectiveness of the fan assembly. This isolates the pocket of air behind the radiator, allowing the fan to efficiently draw the required air through the radiator. It butts up tightly to the face of the radiator, effectively sealing the cavity. How does the shroud work? Basically, the shroud surrounds or partially surrounds the fan. Signs of a damaged cooling fan shroud include engine overheating, your A/C not cooling effectively, or any visible damage to your cooling fan shroud. If you don’t have a shroud or if it fits poorly, get the right one (that's a big hint if you end up sitting behind Old Faithful on a regular basis). Keep in mind that shrouds are often manufactured from plastic and as result, the condition typically degrades dramatically over the years. Unfortunately, they are often missing on any number of older cars. Increasing the airflow through the radiator improves the cooling and as a result, a shroud is almost mandatory on high performance applications. The idea is of course to provide a constant supply of air through the radiator so that the coolant is reduced in temperature. But when it comes to cooling you absolutely must first figure out a way to bring the air to the radiator (cooler).
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