Can Derale Dual High-Output Electric Radiator Fan Part # D16927 Be Used with Stock Belt Fan

Question:

Can you use a belt Fan and an electric fan on the front of the radiator? I have a 56 Chevy with a 350 small block? Also how much space is necessary between the belt fan and the radiator?

asked by: Kurt F

Expert Reply:

To use the Derale Dual High-Output Electric Radiator Fan, part # D16927, in your 1956 Chevrolet with 350 small block you will need to be able to fit the 3-3/4-inch-deep fan housing between the radiator and the engine. (This is a puller fan which draws air in through the front of the radiator; it mounts behind the radiator.) The overall dimensions of the fan housing are 26-inches wide x 18 inches tall x 3-3/4-inches deep.

This dual-fan has an output capacity of 4000 cubic-feet-per-minute (CFM), which is enough for complete cooling for many vehicles. This can in some instances allow for removal of the stock belt-driven engine fan, which can increase fuel economy and horsepower. When you use only electric-power fans to cool your engine there is no loss of engine power and the fans will cool evenly regardless of engine speed. To determine if you can eliminate the belt-driven fan from your vehicle you will first need to determine its CFM cooling requirement. Engines that have been modified and vehicles that will tow may have higher cooling requirements. I have linked two articles concerning engine fans that might be useful to you.

If you prefer to add a second fan to the front of your radiator to supplement your stock belt-driven engine cooling fan you might instead consider the Derale # D18214, which is a dual-speed-capable single 14-inch fan that delivers 2100 CFM air volume. This fan is only 2-5/8 inches deep. It can be mounted on either side of the radiator to operate as either a puller or pusher fan. It will require approximately 3 inches of space either in front of or behind your radiator. Derale also offers a 17-inch version that delivers 2400 CFM, part # D18217. Please note that for two-speed operation 2 separate turn-on sources are required.

Derale offers several thermostatic fan controls, including their # D16759, which allows user-selectable activation temperature (150 to 240 degrees) and a push-in radiator probe. They also offer a simple lighted power switch, part # D16740.