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open air cleaner

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by keeferk5, Oct 14, 2001.

  1. keeferk5

    keeferk5 Registered Member

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    What if any advantage do I have by using an open air filter as opposed to leaving the stock, air cleaner on, I already use a K&n filter. my 1 mechanic buddy says that stock it gets enough air, and the other says open it up? P.S. I have an a 1985 kr silverado w/ 4-brl 350 ( mostly stock )

    The only thing the U.S. Militery could find to take the place of the K5 was the Hummer.
     
  2. HispanicPanic

    HispanicPanic 1/2 ton status

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    just turn the top of the original air cleaner lid upside down and presto you got an open air cleaner if you like it then buy the real open element or hell just leave it that way its the same differance[​IMG]

    <font color=purple>I put the Panic in Hispanic</font color=purple>[​IMG]
    <a target="_blank" href=http://4x4.alloffroad.com>4x4.alloffroad.com</a>
     
  3. MOABDADC22

    MOABDADC22 1/2 ton status

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    I did what HISPANICPANIC did and just turned my stock cleaner lid upside down. I also run a K&amp;N element....what a difference.

    <a target="_blank" href=http://www.moabdadc22.alloffroad.com/>http://www.moabdadc22.alloffroad.com/</a>Real four wheelers don't need tools to remove body panels, paint, tail lights..etc.
     
  4. TXsizeK5

    TXsizeK5 1/2 ton status

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    My frined runs the top upside down and his KN got dirty as crap in like 1 week. MInes still clean after a month

    6in 87' K5 w/ 35" BFG muds.
    305/Sm465/ NP208
    Kn filter and 4.56
    "Those who live by the sword get shot by those who don't"
     
  5. chevrules

    chevrules 1/2 ton status

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    This depends on how much you wheel and where.Sure you can flip the top and get more air but you can also get crap in there.Keep it closed...hope the word crap did not offend anyone.

    chevrules...always has and always will
     
  6. LKJR

    LKJR 1/2 ton status

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    it's all a matter of preferance, the parts supply places (summit, jegs, etc) sell a foam pre screen to go around your filter to keep the big gunk out.
    just some FYI for ya

    Like em big and topless
    Excuse me...Would you mind removing your import from under my chevy?
     
  7. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Open element is louder...but prolly hurts power. It depends on the stock filter assembly. The newer trucks are ducted to draw in cooler outside air, and this will net you the most power. My original air filter housing just had a snorkel so it was drawing in underhood air anyways. I swapped to an open element...but I'm planning on pirating an assembly from a newer GM truck and ducting to the grill area.

    Ideally you want nice cool air entering your air filter...not hot underhood air.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  8. zakk

    zakk 1/2 ton status

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    just flip the lid. that is what i did and i just flip it back to seal the single snorkle when i go out wheeling. I can deal with a little less power better than i can mud, water, dirt in my cylinders

    -Zakk
    '77 K5 SB 400 TH350 NP203 p/t 6" Lift D60 14BFF 4.10's 36"Wrangler II's

    [​IMG] CK5's MOAB 2002 OR BUST!! [​IMG]
     
  9. chevyracing

    chevyracing 1/2 ton status

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    Get a big block with nitrous then it won't matter..LOL!!

    Jus' kiddin people, don't throw stones.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=) [​IMG]
     
  10. Esteban86K5

    Esteban86K5 1/2 ton status

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    Well that's why you run a K&amp;N filter. So you CAN clean it. I run mine open and yeah it gets dirty put I take it off and clean it every oil change or more depending on how much I go wheeling.

    <font color=blue>Esteban</font color=blue>

    <font color=red></font color=red>
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  11. riz

    riz 3/4 ton status

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    <font color=purple> Cooler air = more power ! Sucking under the hood air is hot and won't net you the improvements you're looking for !

    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> BOW CHICKA BOW WOW !
     
  12. Esteban86K5

    Esteban86K5 1/2 ton status

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    That's what everyone keeps telling me but I get outstanding improvements with the open filter. Ever time I have to put the snorkel back on to smog my truck, I feel like I'm pulling a damn trailer full of rocks behind me. Just my experience though.

    <font color=blue>Esteban</font color=blue>

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  13. riz

    riz 3/4 ton status

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    <font color=purple> By snorkle do you mean one that goes out and up to the top of your rig ?


    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> BOW CHICKA BOW WOW !
     
  14. Esteban86K5

    Esteban86K5 1/2 ton status

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    No the snorkle that goes from my carb to the front grill.

    <font color=blue>Esteban</font color=blue>

    <font color=red></font color=red>
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  15. riz

    riz 3/4 ton status

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    <font color=purple> That's odd ! The cooler air the better is the norm !

    L8r,
    . Riz . <a target="_blank" href=http://www.geocities.com/rizmonkey>www.geocities.com/rizmonkey</a>

    <font color=purple> BOW CHICKA BOW WOW !
     
  16. Blazr77400

    Blazr77400 1/2 ton status

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    I think that a Bigger Volume of air will help, and I also think that cooler air will help too, but I feel on a Gas motor the open air cleaner would help more because of volume, because the temp. would not effect it as much. On my diesel it was the opposite. If you have had a diesel and a gas motor you can tell. On the diesel, when it was winter, it felt like it had an extra 30 horse compared to summer. My blazer didn't seem to change at all from summer to winter.
    But I know everything[​IMG]

    4 wheeling is like sex, when its good, its really, really good, when its bad its still pretty good.
     
  17. TwoCrowsDesign

    TwoCrowsDesign 1/2 ton status

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    True that cooler air is supposed to be better, however the stock intake ducting is often said to be restrictive. Hence the aftermarket products, such as the AirRaid, tout better flow of cooler air.

    I find that my stocker runs stronger with the lid off as well, also MUCH louder - you can hear that baby huffing! YMMV

    John
     
  18. Thunder

    Thunder 3/4 ton status

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    Flipping the lid over helps my 89 with TBI lot. I have tested it both ways when towing my boat. I have a lot more power when climbing hills with my air cleaner lid flipped upside down.It is a lot louder though.
    When I hit the dirt I turn the lid back over and draw air in from the front that way my filter stays a lot cleaner and I dont have to clean it very often.

    <a target="_blank" href=http://coloradok5.com/gallery/Thunders-Blaze>http://coloradok5.com/gallery/Thunders-Blaze</a>
    <font color=blue>NEVADA: Where the pavement ends, and the West begins.</font color=blue>
     
  19. dyeager535

    dyeager535 1 ton status Premium Member

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    I "tested" the open air cleaner/closed theory the last few tanks of gas. Result? 0 difference in mileage, and seat of the pants. I used teh same filter, which is one of the TALL ones. I have yet to hear anything bad about Fram air filters, although knowing the history of their oil filters, it doesn't instill confidence.

    Your carb can flow what? 800CFM max (depending on who made it) Until someone proves that the stock snorkel (basing this on my '81 up style radiator duct) can't flow that much air, or that my 350 NEEDS 800CFM, I'm gonna say it doesn't make any difference. Think about it. If the engine doesn't USE 750CFM, or even if it does, and the snorkel flows that much, an open element won't do squat for power, except hurt it, with warmer air. believe it was in the latest Petersons 4 wheel mag I got, every 10* raise of air temp=1hp. Ambient air temp is typically what, 80-90? Engine temp is 195, underhood temp crawling is likely 150, you are likely looking at 7hp loss through warm air. (total generalization there with numbers)

    I would personally attribute all tested gains to either A)clogged, used filters or B) restrictive filters, which I believe is what K&amp;N says is their advantage, easier flowing.

    If you were to ask me, I'd say get the TALL air cleaner, run the snorkel, and if you want to spend money, buy the K&amp;N, if not, stick with replacing a cheap chain store filter once it gets dirty.

    Dorian
    My tech/links page: <a target="_blank" href=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</a>
    No anti-theft measures on your truck? No pity when its stolen
     
  20. BlazerGuy

    BlazerGuy 3/4 ton status

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    I run a open element K&amp;N because my neighbor had it on a ol' pontiac 400 and didn't need it any more. It's the small 4"(?) tall one. I think it may be benefical to take out the black "plug" next to the radiator(the plastic piece that the snorkel plugs into) for more air flow with the stock system.

    ~~'84 K5~~
    Check it out at:

    <a target="_blank" href=http://www.k5.rockcrawler.com>www.k5.rockcrawler.com</a>
     

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