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  1. Radiator Fans
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  3. 8 Inch Diameter
  4. 350 CFM
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Derale 8" Dyno-Cool Straight-Blade Electric Fan - 350 CFM

Derale 8" Dyno-Cool Straight-Blade Electric Fan - 350 CFM

Retail:$63.48
Our Price: $56.81
You Save: 11%
Radiator Fans
Shipping Weight: 3 lbs
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7-7/8" Wide x 8-1/4" tall x 2-1/4" deep, low-profile, straight-blade fan improves gas mileage and boosts overall performance by maintaining proper airflow to your vehicle's radiator. Great Prices for the best radiator fans from Derale. Derale 8" Dyno-Cool Straight-Blade Electric Fan - 350 CFM part number D16908 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (127)
  • Q & A (0)
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Derale Radiator Fans

  • 8 Inch Diameter
  • 350 CFM
  • Electric Fans
  • Derale
  • Dyno-Cool Fan
  • Straight Blade

7-7/8" Wide x 8-1/4" tall x 2-1/4" deep, low-profile, straight-blade fan improves gas mileage and boosts overall performance by maintaining proper airflow to your vehicle's radiator.


Features:

  • Increases fuel economy, horsepower and torque
  • Improves overall performance
  • Can be mounted on either side of the radiator, as a pusher or puller, with no loss of airflow
  • Has ultra-low-profile design for tight applications
  • Includes mounting kit


Specs:

  • Overall dimensions: 7-7/8" wide x 8-1/4" tall x 2-1/4" deep
  • Fan dimensions: 8" diameter x 1-1/4" deep
  • Distance between mounting holes: 4-3/8"
  • Maximum cubic feet per minute: 350
  • Power draw: 5.3 amps
  • 1-Year warranty


Whereas belt-driven fans use up power from the engine to turn, electric fans do not, thus removing any unnecessary load and increasing both fuel economy and horsepower. In addition, you do not have to worry about an electric fan's slowing down at low RPM, as many belt-driven fans do, so you are guaranteed sufficient airflow regardless of the vehicle speed.

Before purchasing an electric fan, be sure to determine the CFM (cubic feet per minute) requirements for your engine. And remember, engines that have been modified or vehicles often used for towing may require additional CFM. There is no limit to the number of fans you can install, as long they all fit appropriately and are mounted on the same side of your radiator so that they do not cancel each other out.

Two types of turn-on sources are available for this fan. The Derale Lighted On/Off Switch for Electric Fans (D16740) allows for manual control of your fan so that you can choose when to turn it on and off. Thermostatic controls, on the other hand, send a signal to the fan, directing it to shut off when fluid temperatures reach an appropriate level, thus saving power. Once the temperature climbs again and additional cooling is needed, the fan is automatically turned back on. Thermostat switches can be single-stage with pre-set temperatures - D16735, D16738, D16739, D16720 and D16721 - or adjustable - D16778 and D16779.

Dimensions

16908 Derale Dyno-Cool Straight-Blade Electric Fan Kit

Item # D16908

Installation Details D16908 Installation instructions




Customer Reviews

Derale 8" Dyno-Cool Straight-Blade Electric Fan - 350 CFM - D16908

Average Customer Rating:  4.6 out of 5 stars   (127 Customer Reviews)

7-7/8" Wide x 8-1/4" tall x 2-1/4" deep, low-profile, straight-blade fan improves gas mileage and boosts overall performance by maintaining proper airflow to your vehicle's radiator.

by:

This fan is for a project that will not be completed until the middle of 2014 or later. I plan to use it to increase the air flow through the air conditioner condenser in my 1969 Corvair convertible. I will be ordering another fan since my design requires two fans for greatest efficiency and the flow rate for these fans is on the low side. The 500 cfm fans comes with too many items that are useless for my application thereby being too expensive.
Dale Bartley



by:

Great staff great products grade A service from customer service will definitely order from etrailer again

Liviu

8/9/2013

Hi I need to know at what temp. is exactly activated Thanks

Patrick B.

8/9/2013

This fan does not include a thermostat system. It can be wired into the original electrical system and will then operate according to the thermostat system in the vehicle. It can also be wired to an on/off switch but that is usually only done if off-road and race applications. We have plenty of thermostat options, sold separately, for determining the temperature at which the fan kicks on. For example, part D16735 kicks on at 180 degrees and shuts off at 165 degrees. Part D16759 is an adjustable thermostat system. Turn-on temperate can be set any where between 150 and 240 degrees. The turn-off temperature will always be 10 degrees less than the turn-on temperature.


by:

lasted over 5 years on 24/7/180 on green house just ordered new one.



by:

Great cooler upgrade for my 1997 GMC Yukon! Little delivery damage, but was so easy to bend those fins back to original shape so no worries!
Nice that you had proper dimension measurements online, so it was easy to figure out what kind I can fit in my truck. Complete kit had everything I needed to get it done!
Modified old cooler bracket little bit and that was it. Works great!



by:

I put the transmission cooler on a 2006 ram 2500 it keeps it 30° cooler than the OEM transmission cooler



by:

Works solidly, much better than the optional stock tranny cooler. It doesn't get temps as low as another one I've had, but it doesn't leak like that one either! Always keeps temps within acceptable range, though at the higher end of acceptable when pulling 7-8k in 110*F outside temps and hills. Be prepared to fabricate a mount for it, not a one size fits all kit!



by:

Removing the front bumper/grill on my Odyssey was a must! Installation was pretty much straight forward once you confirm the feed, and return connection points. Mounting the actual cooler to the front radiator was the easiest part of the job. My Odyssey made two 650 mile trips pulling 2050 lbs with no problems so I’m very happy with the cooler!



by:

I have always loved etrailer and their service. Once again order another of these coolers. Drop my temp from 240 to 170-190 also remember to order extra hose, the adapter if needed for your vehicle make, mount kits. Love it. Perfect this one is on a 07 GMC Yukon XL always add an extra cooler on your 1500 gmc or chevys they help out so much for them.



by:

good product form a great company !
my
only complaint is this was listed as for my specific truck, but the "insta-dapt" supplied doesn't fit the Dodge truck of my year. even doing my research ahead of time, it seems to be hit or miss whether it would fit as some of them come with 5/16 fittings and some (like mine) come with 9/16 fittings. it doesnt matter the engine size, even other 3.7L dodge trucks of the same year have 5/16 fittings... I think Dodge made a change middle year, but never let the consumer know as mine is a late year '04.
no dig deal as I was able to assemble it anyways and got it up and running great and both the radiator and trans are running much cooler now !
I attached the D12902 to the bumper as you will see in attached images.
2 attached images are just before finishing, bumper hasnt been attached yet, one of them is after everything was complete.



by:

I just installed this on my chevy avalanche.
Flipped
the bottom brace around in order to mount to.
The hardest part is getting the hoses on the cooler and over the return line.
I ended up getting a 90 deg quick connection coming from the radiator instead of using the one I got from etrailer. This keeps the hose from bending as much.
Also purchase the installation kit with a hose as you will need an extra hose.
After install I wish I would have went with the next bigger unit which is 10 high instead of 7 1/2 as I had plenty of room.



by:

Good product. The only problem, the hose that is supplied diameter is way to small for the nipples on the cooler. Had to heat up the hose to put on, even then extremely tight fit.



by:

I was able to mount it but never able to actually install it and hook it up completely.



by:

Excellent, way better than the WeatherTech rain guards I had on there before.



by:

This fan looks like it will do a great job.
No
more overheated transmission.
Pulling a trailer in stop and go traffic on a 100 degree day - No problem :-)



by:

Installed this in a 2017 Honda Ridgeline. Mounted it above the factory cooler that was already in the truck. (Flat fin side towards the a/c condenser). I used the insta-mount zip tie kit and also the flex metal mounts to anchor the cooler to the top of the factory cooler bracket as close to the a/c condenser as possible. The vertical bracket (part of the truck) that runs right down the middle of the a/c condenser has to be cut. All fairly minor fabrication. Hack saw and hand drill stuff. The fan has to be reversed to become a pusher. Followed the hood release cable from the interior to run 12 volts to power the fan on at ignition. Haven’t hooked the trailer up yet so I don’t know if this will resolve the hot tranny situation. ( I could smell the tranny getting hot before especially when we stopped at lights). Change your fluid too. etrailer delivered quickly and the cooler was well boxed and untouched.



by:

Appears well constructed and delivered with all parts necessary for installation. Rating base on just that. Have not installed but, when installed and operational I’ll rewrite review.



by:

Hose barely fits on the fittings of the fittings of the cooler. It was very frustrating.



by:

Wanted to give my Honda better ability to handle a tow. this baby does the job. Transmission definitely cooler operation since the install. The install was simple and straight forward.



by:

After one of use on a 2005 Honda Pilot, everything is holding up just fine. The one star less is because of the difficulty in installing it on this particular vehicle. Although this is a universal component, it is MUCH easier to install on pickup trucks. Best of luck with a brand new rubber hose going on with any sort of ease.



by:

i put this unit in my 2008 NIssan Titan pickup. we are going to take a 9000 mile trip this summer pulling a 27 ft HI Lo camper. The instructions were very generic. specific unit instructions would be very helpful. the grill was difficult to get out until i found a Youtube video for that. the hose provided was to short, so I made a run to the parts store. the unit appears to be well made.



by:

I purchased this for my C6 Corvette A6 transmission. I did, however, bypass the radiator and only use the transmission cooler for the C6. I purchased and used the Derale Radiator Adapter fitting 259-13035 for both the top and bottom and just capped them off to keep debris out of the reservoir. I also had to make some custom mounting brackets. This is an excellent product and it keeps the tranny in a great temperature range.



by:

Can't say anything bad about the unit. It was installed in a Jeep Grand Cherokee that I use to haul trailers occasionally that weigh up to 6000 lbs. So far, I've never overheated the transmission at all, which I attribute to the addition of this cooler. Once again, thanks for a great product.



by:

I mounted this fan in the puller position on my auxiliary transmission cooler so that I can tow a 15ft travel trailer with my minivan. Installation was sweet. There was an instruction page in the box and enough parts for mounting. I was surprised at how much air this thing moves. I wouldn't call it noisy since the fan spins smoothly and quietly when I tested it out in the open, but when mounted in the congested grill area of my 2012 Dodge Grand Caravan I can definitely hear it hum more than the stock radiator fan. It pushes that much air. I would definitely recommend this product.



by:

Not sure of the btu output of this but it worked perfectly fine in my jeep with the factory transmission. Upgraded to a built transmission and as it seems ill need a lot more cooling capacity. No rust or corrosion so far. The clamps it ships with are a gigantic transmission hazzard... had a clamp split right down the middle on me in my drive way thankfully. I would buy different clamps if you didn't want fluid puking out of a hose at 90+ psi and kill your trans.



by:

Ive got a 1999 4runner that had the unfortunate luck of having the integrated transmission cooler line rupture inside my radiator. needless to say, the transmission didnt agree very well with having engine coolant running through it and finally died out on me. I bought this transmission cooler to isolate the transmission and the engine cooling systems. The cooler arrived a day ahead of schedule, which is always a bonus. I didnt rate it at 5 stars because I havent had a chance to install it yet and see how it performs, but judging by the reviews that I have read so far, the customer service provided and the prompt delivery, I would say that this transmission cooler will keep my truck running for a good long while. Everything pictured arrived in the box and I have no doubt that it will perform as expected. I will definitely recommend this product and this company to my friends!


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See what our Experts say about this Derale Radiator Fans

  • Electric Radiator Fan for a 1995 Nissan Pathfinder
    The type of electric fan you use in your 1995 Nissan Pathfinder is going to depend on how much space is available under the hood. There are fans as small as 4 inches diameter and 2-3/8 inches deep and as large as 32 inches and 3-1/4 inches deep. There is likely more space in front of the radiator than behind it. A fan such as # D18217 is 17 inches in diameter and 2-5/8 inches deep. You would need to measure the available space to determine if this fan will fit or if you need to go smaller...
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  • Recommended Derale Transmission Cooler Fan for 2008 Chevrolet Silverado
    Transmission fluid cannot really be over-cooled but you can make things easier by using a fan such as the Derale # D16308 that includes a power switch and adjustable thermostat. This will save you the effort of switching it on and off and provides consistent cooling regardless of engine speed. You'll want to confirm you have enough space for mounting the fan assembly. Please refer to the measured drawing I have included for you which has dimensions noted. The Derale # D16308 can be mounted...
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    Image 1 for
  • Using Derale Electric Fan Part # D16908 for Remotely Mounted Transmission Cooler
    At 450 CFM (cubic feet per minute) the Straight Blade Electric Fan you mentioned, part # D16908, would provide plenty of airflow for the D13503 Transmission cooler. This has been confirmed with Derale, the manufacturer. If you need a thermostat control for the fan, use part # D16769.
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  • Electric Fan Recommendation for a 1999 Jeep Grand Cherokee with a 4.0 liter V6
    A 2,100 CFM fan should be plenty to cool the radiator of your 1999 Jeep Grand Cherokee with a 4.0 liter V6. A fan like the part # D16626 should work well. This is a 16 inch fan that can pull 2,175 CFM only requires 18.4 amps. I attached a help article on electric fans for you to check out as well.
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  • Do Electric Radiator Fans Have to be Mounted Directly Against the Radiator, 1982 Chevy Monte Carlo
    For the best performance, a radiator fan like Derale 12 Inch High-Output, Electric Radiator Fan, # D16925, should be mounted directly against the radiator. If there is a gap, less airflow will go through the radiator and it will not be as efficient. If you do not want to use the included mounting straps, I would find another way to mount it directly against the radiator for ideal performance. I have included a link to our FAQ article on electric fans for reference.
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  • Is Derale Radiator Fan # D16908 a Pusher or Puller and Can it be Used on a Motorcycle
    The Derale Radiator Fan, # D16908, can be used as a pusher or a puller fan, depending on where it is mounted. The motor is reversible. You could use it on a motorcycle, provided that it fits in the space you have available on the bike. The dimensions of the fan are 8-1/8 inches wide x 8 inches tall x 2-1/4 inches deep. You will also need to make sure the bike has an electrical system capable of supporting the 5.3 amp power draw of the fan. I have included a couple of FAQ articles below...
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  • Derale Dyno-Cool Fan and Thermostat Recommendation for a Honda Generator Box Air Changer
    I spoke with my contact at Derale and he informed me that the probe from the Derale Adjustable Fan-Control # D16769 can register air and water temperature. You should have no problem using a Derale 8 inch Dyno-Cool Straight-Blade Electric Fan # D16908 fan with a # D16769 to move the air in your generator box. We do not have both of them in a package, but you can order them separately and they will perform together well.
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  • Recommendation of Electric Fan for 1988 Ford Ranger With 2.9L Engine
    When choosing an electric fan for your vehicle you will want to make sure to get a fan that will give you the correct Cubic Feet per Minute (CFM) for the size of your engine. The CFM is how much air is being moved through your radiator in one minute. The typical CFM requirement for a 6 cylinder engine is 1,600 to 2,000. If your 1995 Ford Ranger is used for towing you will want additional airflow. It is always recommended to go with the highest rated fan. I am including a link to a FAQ...
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  • Recommendations for an Electric Radiator Fan for a 1984 Datsun 720 2.4L V6
    In regards to fans, it is not the size that matters it is the airflow. Electric fans are not necessarily vehicle specific. If you have # D16908 that you have referenced, it puts out 450 cubic feet of air per minute. This is not very much and a fan that can generate more would be needed. Typically, a 6 cylinder motor requires 1,600 to 2,000 cubic feet per minute. The fans that you could use largely depends on the space you have in the engine compartment to mount them. I recommend getting...
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Do you have a question about this Radiator Fan?


Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee DeAnne T
Updated by:
DeAnne T
Employee Brian B
Updated by:
Brian B
Employee Daron K
Updated by:
Daron K
Employee Jeff D
Installed by:
Jeff D

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