How to shop for an intake

Discussion in 'Performance & Fuel' started by JennaBear, Jun 21, 2009.

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  1. JennaBear

    JennaBear New Member

    There are three different types of intakes:

    Closed Box (ie. Volant, Outlaw)
    Open Element (ie. AEM, K&N FIPK)
    Drop In filter (ie. K&N)

    When looking at manufacturers claims, one shouldn't just look at the HP numbers:

    You need to look at the highest average airflow which is directly related to torque (subsequently HP).

    Manifold pressure (MAP) is a measurement of restriction, the higher the number the less restriction, so this is another big point.

    IAT (Intake Air Temp) recovery is another big factor in narrowing down a good intake.

    Closed box intakes do better at lower speeds as there won't be as much of a heat soak issue. The open elements use metal shields which absorbs heat (heat soak).

    The open element intakes drop temperatures a lot quicker at higher speeds which in turn creates denser air. The denser air allows for more airflow, which then of course makes more power.

    This all being said, intakes (as well as exhausts) are a matter of personal preference, just taking off the stock tube takes off a lot of restriction. Realistically, the differences between intakes (ie. open vs. open and closed vs. closed) will be minimal. One thing I do encourage anyone who purchases an aftermarket unit to do, is check the fitment every couple hundred miles, these things find a way to wiggle loose and can cause a drop in performance as well as MPG.
    1 person likes this.
  2. 97chevz71

    97chevz71 New Member

    Will check mine thanks
  3. Jimmiee

    Jimmiee New Member

    Thanks for clarifying that for us!
  4. Springthing

    Springthing New Member

    Awesome information. I don't think I've ever read what the differences are between the CAIs. Thanks!
  5. masterfoxscout

    masterfoxscout New Member

    Good post Jenna. This should help out the nooblets shopping for a CAI. I personally think this should be a sticky!!!!!
  6. bry2500

    bry2500 New Member

    Great info!!!!! I second the Sticky
  7. iPublicEnemy47

    iPublicEnemy47 New Member

    good info on intakes
  8. JennaBear

    JennaBear New Member

    Thanks guys, I hope this will help folks out in their quest for a new intake! :glasses:
  9. 2ToNe04

    2ToNe04 New Member

    they should sticky the tbs thread and cai thread and the others.

    Inform those who dont know yet :)
  10. JennaBear

    JennaBear New Member

    Thanks guys, we tested a bunch of intakes on the dyno paying close attention to all the above mentioned factors. If you have any questions, you know where to find me! :great:
  11. werty

    werty New Member

    whaat the best for the 91 k5 with tbi?
  12. JennaBear

    JennaBear New Member

    We didn't test them on the OBS :neutral:, not sure what is on the market for you.
  13. masterfoxscout

    masterfoxscout New Member

    Jenna what about the NBS and NNBS trucks?
  14. Crakums_GT

    Crakums_GT New Member

    Hey Jenna Bear. I believe I've seen you on another club I've paroused through maybe. Glad to see you finally got over to the GMTC. Welcome. Good informational post, I'm actually currently in the market for a cold air intake.

  15. JennaBear

    JennaBear New Member

    I personally like the AEM Brute Force and the K&N 77 Series, they had great results on the dyno.

    Good to see you over here too :great:. Hopefully my write up helped you out a bit :rules:, not trying to promote any specific brand, just want to help folks be a bit more educated rather than just going off of what manufacturers claim.
  16. JennaBear

    JennaBear New Member

    Here are the results of our intake test-

    From top to bottom on the horsepower curve on the graph is:
    AEM no filter
    Stock with KNN drop in filter
    Stock with Fram airhog

    Attached Files:

    Last edited: Aug 2, 2009
  17. cascott325

    cascott325 New Member

    i have a k&n on mine, and it has been there since i bought the truck, i was thinking about switching to a volant intake, about 2/3 of my daily drive to work is highway, but i do a lot of intown driving. i also like to play a lot. do you think this would be a good switch? i know you said its mostly personal preference, but i have heard more good about volant than i have k&n
  18. vms4evr

    vms4evr New Member

    Thanks for posting those dyno numbers. I think I'll stick with the stock air box and K&N filter. Maybe do the stock air box mod and add a smooth coupler.

    Would you have some dyno numbers of the gains with air box and long tube headers? Before and after tuning also? (maybe you could post in a separate thread).
  19. JennaBear

    JennaBear New Member

    Here is an 05 Sierra with LTs, but not a stock air box:

  20. R Runner

    R Runner New Member

    Great informaton! Thank you for the hard work.
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