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Thread: Air Filter Info

  1. #1
    Jr. Mechanic
    Join Date
    Nov 2011
    Location
    Central Illinois
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    128

    Default Air Filter Info

    Air filter info
    http://www.billswebspace.com/AirFilterTest.htm
    I was considering an K&N cold air intake until I read this article.
    Hope folks find the information useful.
    2012 Silverado 1500 LT 4X4
    2003 Suburban LT 2500 6.0L
    2004 2500HD Crew Cab LT 4x4 6.0L - SOLD

  2. #2

    Default

    When I was looking into buying a CAI I found something similar. I was looking for HP gains and found a chart that showed a drop in K&N filter and some holes drilled into the stock airbox only made a few HP less than the K&N CAI. I still went with the Volant and have no complaints about it.

  3. #3
    Jr. Mechanic
    Join Date
    Nov 2011
    Location
    Central Illinois
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    Default

    Quote Originally Posted by aloxdaddy99 View Post
    When I was looking into buying a CAI I found something similar. I was looking for HP gains and found a chart that showed a drop in K&N filter and some holes drilled into the stock airbox only made a few HP less than the K&N CAI. I still went with the Volant and have no complaints about it.
    Just to be clear, I am not picking on K&N. All filters that claim to flow better than stock will allow more dirt into the engine.
    I did some quick calculations. If I am correct, the Delco filter flows 350cfm or 9.9 million cc's per minute. The average small block combustion chamber has a volume of 70cc's. This means you need 560cc's of air per intake cycle. At 4000rpm the engine needs roughly 2.2 million cc's of air. If my numbers are correct, there is no need for a high flow air filter.
    Last edited by paracutin; 11-06-2011 at 10:03 AM.

  4. #4

    Default

    Thanks to Paracutin!
    I have been watching the owner product reviews of the aftermarket air flow products. In most of the reviews, the purchaser stated that there wasn't any gain in mpg. The part I hadn't heard anything on, but makes a great deal of sense is that allowing "extra" air into the engine carries some dirt with it because the higher flow units are more porous. Maybe I'll look seriously at finding a way to get more air to the airbox.

  5. #5
    Jr. Mechanic
    Join Date
    Nov 2011
    Location
    Central Illinois
    Posts
    128

    Default

    Good idea. I hadn't thought about it that way. The tests never said they were performed with a stock air box did they? I wonder what the stock airbox flows?
    I might pick up an airbox from a salvage yards and see what can be done.
    Thanks bsmntcritr for making me think more about this.

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