Do rear bumper diffusers work?

The main function of a car rear diffuser effectively increases the vehicle’s downforce and increases the car’s grip on the road surface and reduce the aerodynamic drag. With low air pressure under the car and high-pressure above, increased downforce is created and the aerodynamic drag is reduced.

Why you need a car diffuser?

It’s enough to give anyone a headache! Diffusing a fresh-smelling blend like Simple Clean in your car is a great way to freshen the air naturally. Diffusers also make it much easier to control how much scent is produced because you can unplug it at any time.

How long do car diffusers last?

Each diffuser will expire approximately 8-24 months from the time the product is received.

Are car diffusers safe?

A car air freshener can not only give off a good scent but also disinfect your interior. People come and go in your car so your interior will always be prone to germs. Pollution from the outside air or vehicle emission can also be a source of unwanted pathogens.

How does diffuser generate downforce?

The diffuser itself accelerates the flow in front of it, which helps generate downforce. This is achieved by creating a change in velocity of the air flowing under the diffuser by giving it a rake angle which in turn generates a change in pressure and hence increases downforce.

Can you refill a car diffuser?

All you need to do is unscrew the cap and remove the plastic plug to release the fragrance, screw back on the lid and hold it upside down for 2-5 second, then its ready to hang in your car!

How long does a car diffuser last?

approximately 8-24 months
Each diffuser will expire approximately 8-24 months from the time the product is received.

What is a rear diffuser and what is it for?

So what exactly is a rear diffuser, and what is it for? The diffuser is usually located at the back of the car, and its aerodynamic purpose is to increase the airspeed of the air flow underneath the car.

How does a diffuser affect air pressure under a car?

The air pressure beneath the car is affected by the diffuser, so that the air pressure can normalize to ambient pressure in the diffuser as the car moves through the air. Much like a rear spoiler and an airplane wing make use of Bernoulli’s Principle, so that pressure decreases as airspeed increases.

Why do we need to study diffusers?

This will allow us to better understand exactly why their designs are more effective. ‘The key role of the diffuser on a modern racecar is to accelerate the flow of air under the car, creating an area of low pressure, thus increasing downforce.’

Do BMWs have rear diffuser panels?

Today’s BMWs feature factory rear diffuser panels that can easily be swapped or replaced, and aftermarket companies offer rear diffuser treatments for a wide variety of makes and models. So what exactly is a rear diffuser, and what is it for?