The Science Behind Cowl Induction Hoods

When it comes to upgrades for your truck, nothing looks cooler than a cowl induction hood. The scoop, the lightweight construction and the roar of the engine – it’s enough to make any truck lover stop and take notice. But cowl induction is about more than just aesthetics. This technology offers a range of benefits that can improve gas mileage, get more power out of the engine, and generally enable your truck to run better.

Cowl Induction Hoods

We’re going to take a closer look at exactly how these things work and why they are a sound investment for anyone interested in getting the most out of their truck.

Placement of the Hood Scoop

Hood scoops are placed up on the hood and can face out or in toward the windshield. Outward facing scoops take in air directly while windshield facing cowl induction hoods have air pushed into them because the air density increases behind the welded-in debris screen and against the windshield. To get the most effective system, choose the ones that take in air directly.

In either case, the scoop needs high pressure to work effectively, so the make and model of your truck will determine which kind of hood scoop is right for you. Keep in mind that a shallow hood that is mounted too low may not bring in enough air to have a real effect on engine performance – the positioning and size of the hood scoop is very important due to the nature of air pressure changes when driving at higher speeds.

How Hood Scoops Work

So what does this fancy hood scoop do exactly?

The idea is actually very simple. By default, the temperature of air under the hood is about 50 degrees higher than the ambient air temperature. That means the air is denser and will subsequently slow things down, causing fuel to burn less efficiently (i.e. faster).

A ram air hood directs air into the engine that is much cooler than the natural environment. As a result, everything moves much more smoothly, increasing the power produced by the engine. Some scoops are also intercoolers for turbo systems, actively reducing the temperature so that density is increased within the compressor and more power is gained when turbo is engaged.

How Much Does It Change?

The actual numbers vary depending on the vehicle. Some trucks see significant improvements while others see only moderate changes. The biggest changes will come if you install supplemental cold air intake systems, or if you upgrade other systems such as adding a turbo to a diesel engine.

Regardless of its specific effect, cowl induction looks cool and will dissipate heat inside your engine, making it a fun and effective upgrade for any make or model of truck.

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