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Flex-a-lite Blog

  • A Quick Test to See if Your Electric Fan Sucks

    1 Comments 2011 April 12
    by admin

    Here's a quick test to see if you've wired your electric fan to draw air the correct direction through your radiator, and to get a rough idea of whether it is pulling enough air to keep your car cool. All you need is a sheet of 8.5x11 inch paper, a fully-charged battery and a short safety check list.

    Turn the power to the fan on (you may have to temporarily install a manual override switch, or bring your engine up to temperature so the thermostat turns on the fan). Make sure the engine is turned off for your safety. Place the sheet of paper on the side of the radiator opposite of the fan.

    If it stays in place, you've wired the fan with the correct polarity, and the fan is moving pretty good air through the radiator.

    If it blows off, you have the fan wired backwards.

    If it doesn't blow off the radiator, but it slowly falls away, the fan isn't pulling enough air through the radiator. There can be quite a few causes for that, which we cover in the video.

  • How to Gain Power and Fuel Economy

    8 Comments 2011 March 25
    by admin

    The old adage that you can't have your cake and eat it too isn't always true. Diesel Power magazine did some testing and showed that when it comes to converting your power-hungry belt-driven fan with a Flex-a-lite electric fan, that you can gain power and fuel economy. You can read the whole article at

    The bigger and heavier the belt-driven fan, the more power you're going to free up. And you'll also see an improvement in fuel economy. The math here is easy: it takes more energy to spin a belt-driven fan than an electric fan. Another benefit of converting to a Flex-a-lite electric fan on your diesel truck is quicker warm-up times. That's like having you cake and eating it too, plus a side of ice cream!

    You can find more information on the Flex-a-lite electric fan for '03-'08 Dodge Ram trucks with Cummins turbodiesel engines by visiting

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  • How We Would Hot Rod Santa's Sleigh

    3 Comments 2010 December 22
    by admin

    Christmas is upon us, and in between trying to finish up production details on next year's new products, our minds have wandered into wondering about things. Things like how long is the naughty and nice list? How does Santa travel around the world in one night? We track him every year on the NORADsm web site, and we still don't get it. And why Mrs. Claus doesn't join the big guy for his annual present-delivering trip around the globe? We think it might be because it's too darn cold in that sleigh! Continue reading

  • Patented Radiator Technology

    1 Comments 2010 August 30
    by admin
    Flex-a-lite receives a patent on its revolutionary Flex-a-fit sidetank design used in all Flex-a-fit aluminum radiators
  • Real-world Fuel Economy Gains

    10 Comments 2010 August 5
    by admin
    Trev Burt shares his experience installing a Flex-a-lite electric fan and the mpg improvement he found
  • How to Mount an Electric Fan

    1 Comments 2010 July 25
    by admin
    Mounting a Flex-a-lite universal electric fan is easier than you might think. In this article, we'll show you two different approaches.
  • How to Choose the Correct Flex-a-Fit Radiator

    1 Comments 2010 May 29
    by admin
    How to Choose the Correct Flex-a-Fit Radiator
  • How to Choose an Electric Fan

    14 Comments 2010 April 24
    by admin

    Whether we're at events or on the tech line, how to choose an electric fan is one of the questions we answer very, very frequently. While Flex-a-lite offers electric fans designed to bolt right into quite a few factory applications, we'd like to take this opportunity to help guide you in measuring your car of 4x4 to fit it for an electric fan.

    The first step is to make sure you want an electric fan. Continue reading

  • Special Offer '03-'08 Dodge Ram HEMI Owners

    Comments ON 2010 April 16
    by admin

    Hot off the production line and shipping now: A fully shrouded electric fan that moves 3,300 cubic feet per minute (CFM), complete with engineered mounting brackets for bolt-in installation in '03-'08 Dodge Ram pickups with the HEMI engine! Flex-a-lite Part No. 183 replaces the stock fan, fan clutch  and shroud assembly for more horsepower, quicker engine warm up, and better fuel economy. You can view all of the new Flex-a-lite products unveiled at the show by clicking here.

    This new application is a fully shrouded 15-inch electric fan that moves 3,300 CFM that mounts directly to the radiator in '03-'08 Dodge Ram pickups equipped with the 5.7-liter HEMI. Our setup includes mounting brackets for the stock overflow tank, as well as an adjustable temperature sensor and A/C relay to operate the fan between 160 and 240 degrees F. Continue reading

  • Radiators: Aluminum vs. Brass

    11 Comments 2010 March 30
    by admin

    There is an age-old debate about which material is better to make radiators from:  brass or aluminum. Most people focus on the radiator core design when choosing a radiator - how many tubes, tube size, how many fins per square inch, etc. - but the core is not the only part of the radiator that can cool. The sidetanks hold more of the cooling fluid than the core!

    Just about every high-performance vehicle you see in car magazines has an aluminum radiator. So you might assume that aluminum has the best cooling properties. That actually isn't true, and we'd like to share some facts and test data that compare aluminum to brass, and even to composite radiator sidetanks. Continue reading

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