Thursday, November 19, 2009

Let the engine breath...like we all do......Vol.2

Open Element Performance Air Filters

Normally, the air passing through the intake system is 21%
oxygen while nitrous oxide is 33%. We all know that nitrous
oxide is a power-boosting, complete and more expensive mod
in tuning process, and I hope we all agree on the performance
of this mod. Nitro increases the density of the oxygen in the air
to 33% from 21%, which is still quite close to the natural
density. Do you believe that a cotton performance filter can
increase the density of the oxygen? No.. So, the only fact about
the open element performance filters is that they only let some more air to pass
through, and the most important question is that how much horsepower do we get
from them?
Tests on dynamometers show that you will lose horsepower, not gain it if you don't
find a way to duct cool air directly to the cone filter. Unshielded cone filters (K&N or
any other) were reported to yield a net loss in horse power. The factory filter pulls cool air from outside the engine
compartment, while open cone filters will pull warm air from the area behind the radiator. Warm air is less dense than
cold, so this can cost between 6-13 HP. Cone filters like K&N and similars only raise the Hp's by 0-2 Hp's on a normally
aspirated engine, however, on turbocharged or supercharged engines, the increase is somewhat higher like 8-10 HP,
according to the power and vol. of the engine.
Another issue on performance air filters is that they only affect the top end, meaning close to redline. You can feel a
power loss at low revs. And one other is that the cotton filters let in considerably more dirt (300-500% more) than stock.
Filter allows more dust and fine dirt particles into the engine, but general consensus is that this should make no difference
to engine wear.

To get HP to increase, you need cold air... hot air will decrease HP. So find a way to isolate the filter. Use a special, large
entry box that will help suck the cold air from outside the engine compartment, or cut the hood.
Change your driving characteristics. Change gear at slightly higher revs, cause you will get power at high revs especially
closer to redline. (I'm sure you also do that in any case, at least for hearing the sound
Clean and re-oil your filter periodically. Even if you don't clean the filter, just re-oil it so you can be sure that the fine
particles or dust can't pass through the filtering element.
To get HP to increase, you need cold air... hot air will decrease HP. So find a way to isolate the filter. Use a special,
large entry box that will help suck the cold air from outside the engine compartment, or cut the hood.
Change your driving characteristics. Change gear at slightly higher revs, cause you will get power at high revs
especially closer to redline. (I'm sure you also do that in any case, at least for hearing the sound.
Clean and re-oil your filter periodically. Even if you don't clean the filter, just re-oil it so you can be sure that the
fine particles or dust can't pass through the filtering element.

Courtesty:- http://www.tuninglinx.com