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What size open element air filter??..

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Impex, May 5, 2000.

  1. Impex

    Impex 1/2 ton status

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    I want to get an k&n air filter open element type but im not sure what size to get. Any help from you guys would be great!

    Thanks
     
  2. 82K5

    82K5 1/2 ton status

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    Mine's a 14" round and 2" high. You will also need to get a top and bottom for it.

    Phil
    82K5
     
  3. Bigd

    Bigd 1/2 ton status

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    I once read in a Hot Rod article that a larger round element breaths better then a tall skinny one.Can't remember why though.
     
  4. BB454

    BB454 1/2 ton status

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    14"x4" on my 454 - The space between the carb and the inside of the bonnet/hood is the limit of how tall you could go with the K&N. Previously ran a 14"x6" on the smallblocks that had more space on top. Also get the K&N Pre-cleaner that covers the filter - It does keep the filter cleaner and looks great without restricting the flow at all.

    BB454
    IF IT DOES NOT HAVE 8 PISTONS - IT'S BROKEN !
     
  5. '73 K5

    '73 K5 1/2 ton status

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    There's a formula I read a while back. You take the engine size x highest RPM divided by something and it tell you how high the element should be. Its set up for 14" elements. I remember when I did mine that I put in 350 x 5,000 RPM and it said I needed a 3 inch tall one. If your motor is really high perf, then get a 4 or 5 incher.

    '73 K5
    Chevy good...Ford bad
     
  6. Balou

    Balou 1/2 ton status

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    14 x 3" is doing fine for my 350.

    Balou
    '79 K5,350,465,205
    [​IMG] get fuc.... M-Class out of my way !!! [​IMG]
     
  7. NYC K5

    NYC K5 1/2 ton status

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    the smaller, wider air filters are better because of renyolds #, trust me i just took my fluids final last week
     
  8. NYC K5

    NYC K5 1/2 ton status

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    the intake calculation goes something like bore(in feet)*stroke(in feet)*number of cylinders*max rpm=air needed in cubic feet per minute(cfm) im pretty sure thats it. you may want to add 10%naturally aspirated,50% turboed anything more than that is throwing money out the window.
     
  9. Blazer79

    Blazer79 1/2 ton status

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    I have a 14"x5" on mine. It's supposed to flow 900cfm, but I got it for looks mostly (my carb is 750cfm and I know I never use more than 600cfm). It really looks beautiful with that chrome cover. With an Edelbrock Performer Intake and an Edelbrock #1902 Q-jet, the wingnut barely scratches the hood.

    Just be careful because I think it's not smog-legal in some states.

    <font color=black>//////
    What the heck!...Drive it like gas is $0.50/gal!!!
    </font color=black>[​IMG]
     

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