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Old 12-16-2012, 11:00 AM   #1
NicoleC
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Air Intake

I ask you guys all my questions, but you're going to have to bear with me on this one because it is a dumb one. Just remember I'm still learning.

What does an aftermarket air intake do? How does it benefit the car?


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Old 12-16-2012, 11:30 AM   #2
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Here is how I understand it: the general concept is that it allows you to use a less restrictive filter and, in the cases where you replace the piping, a less restrictive path from the filter to the throttle body. In some cases, it also allows you to more effectively draw (relatively) cooler air from outside of the engine bay.

The benefit of less restriction in the intake path is that there is less drag due to vacuum during the intake stroke, allowing the motor to operate more efficiently. And, of course, the theory with pulling the coolest possible air is that you want the densest air possible so you get the highest amount of oxygen possible for combustion. You could think of it like trying to breath through a coffee straw and then breathing through a soda straw - you can fill your lungs up faster and more easily breathing through a soda straw. Of course, I'm a suspension guy, not an engine guy, so this is a simplified explanation.

The net gain of all of this is a potential increase in power depending of course on the motor and atmospheric conditions. For the Focus, many people have reported a measurable increase in power on a Dyno as a result of installing an aftermarket intake.
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Old 12-16-2012, 11:35 AM   #3
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Less restriction is usually accompanied by poorer filtration, so no free lunch. Could also create warranty issues. Not worth it imho.
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Old 12-16-2012, 02:38 PM   #4
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Quote:
Originally Posted by dan50 View Post
Less restriction is usually accompanied by poorer filtration, so no free lunch. Could also create warranty issues. Not worth it imho.
Not neccesarily. You can have the same level of filtration with less restriction by using a filter element with a higher area. A properly maintained and oiled K&N or equivalent filter will filter more than adequately and provide less restriction than the paper filter that comes stock. It is also cleanable and reusable, which makes it a one-time purchase. If you live in a dusty climate, a prefilter will help.

Also, they can only deny your warranty if they can prove that a modification done to your car caused the damage in issue. There little to no chance of you damaging your car by installing an aftermarket intake if you research beforehand and install it correctly.
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Old 12-16-2012, 03:56 PM   #5
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I am putting my car back to stock since the Ti is now my wifes DD. Have my FSWERKS intake listed in the for sale section.

http://fswerks.com/fswerks_coolflo_air_intake.htm

http://www.focusfanatics.com/forum/s...46#post4500946
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