High performance air filters. Do they work?

The first example is a so called high performance flatbed filter replacement:

We threw out our old GUD Filter and replaced it with a K&N High performance filter.

The increase in throttle response can hardly be felt. The air flow is a little better but hey... Why don't Autozone and others approve it. Why hasen't it gotten approval from SABS. According to some contacts, these aftermarket filters also let dust particles and other stuff go through alot more than the standard GUD filters and OEM manufacturer filters. Also do note that our GUD filter was old.

Advantages:

K&N filters you do not have to throw away. They are easy to clean.
There is slightly better flow (More noticeably in turbocharged vehicles)... but really very very very little!

Disadvantages:

Filtration is not as good as the standard filter
They are more costly

Next we tested a conversion from a box filter system to a cone filter system without the box.

There is no difference at all. There is a loss of KW (Power) in many cases since the hot engine bay heat is no longer shielded by the air box. Sure, more air can enter the engine because of the cone filter surface...but what does it help if the air is hot.

Advantages:

Sounds better according to most people

Disadvantages:

Potential KW (Power) loss due to more hot air coming into the engine.

Finally, we tested a properly designed induction system:

The throttle response is a little better and more noticeable when you start reaching high speeds (Since there is ram air tubing right by the bumper ducts where wind pressure can be taken advantage of and colder air exists. The filter must also be heat shielded and away from hot air. A box can be made for the filter as well.) Also there is 2-5KW more power at most on older cars and 1-2KW more on newer cars (Obviously newer cars have been optimized properly but mass production also doesn't help much).

Advantages:

Sounds better
Small increase in power and throttle response if done properly. More noticeable on older cars.
A little more fuel economic / efficient (but very little)

Disadvantages:

More plumbing involved. Needs to be done properly.

Conclusion:

Make sure your air filters are clean at all times. It will help reduce fuel consumption as well as offer better throttle response.
Rather go for the full induction kit or have one made especially for your car. If it is done properly, you will see a difference.

Every KW counts according to us speed junkies! So yeah, if you get 1-2KW extra, then go for it. It is a relatively cheap mod and works nice with a decent exhaust system. Remember if you have nice air flow...your engine also needs to get rid of it faster.

If you don't want power increases... it is still a good idea to replace your old filter with a new so called high flow filter. You will benefit from not needing to replace it that often and just clean it when necessary.

Article Source: http://www.articlesbasecamp.com

Jose Smit is the owner of his own high performance car parts website. You can view his website at www.snailsonsteroids.co.za

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