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From air box to open filter.. what can I use?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by BillyBob, May 17, 2001.

  1. BillyBob

    BillyBob 1/2 ton status

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    Location:
    Dumont, NJ
    I wanna ditch the crappy air box from my 84 and put an open element on it. I was looking in summit's catalog, and they have some reuseable element air cleaners. Now, they have ones with flat bases for Q-jets, or ones that are offset for HEI distributors. Which one should I get? What about a K&N or holley reusable filter? I wanna get some ideas on what I can use, so any info is appreciated.

    <A target="_blank" HREF=http://billybob.coloradok5.com>http://billybob.coloradok5.com</A>
    If it ain't leaking oil, it ain't my truck![​IMG]
     
  2. Thunder

    Thunder 3/4 ton status

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    K&N works for me. I'd stay away from The Holley though. Holley and Blazers are like water and oil they dont mix. JMHO
     
  3. 8_YOUR_H2

    8_YOUR_H2 1/2 ton status

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    I have a Q-jet and an HEI ignition, and I used the plain old K&N unmodified, drop base setup. I have the tallest one they sell and it almost doesnt clear the hood. I did notice a difference in power.
    Brent
     
  4. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

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    I live down south in Atlanta. My 75 was sucking all that hot air from under the hood and durring the summer I had all sorts of problems with ping even with the timming at 4 deg and a K&N drop in. I put the air cleaner off a 85 with a K&N drop in and the factory snorkle in the grill and it cured my issue and got the timming back up to 8deg. The factory snokle pulls nice cool air from the front and acts like a ram air at speed. I don't think your going to see any hot weather gains with an open element and may in fact see a loss due to the hot air the engine will be sucking.
    I also run a Supra and one of the memebers of a mailing list compaired HP on a Dyno with the only change being the stock air box with a Drop in K&N and the K&N FIPK (open element kit) and lost 5hp because of the under hood heat. Mind you this was on a 400hp Turbo car that is much more tempermental to things but it's hard data on a Dyno showing the truth about how much under hood heat can rob HP.
    Another issue with open elements is if you wheel in slop and deep water your running a bigger risk of sucking water into the engine. With the factory snorkle I just pull it out of the grill and turn it behind the battery to get it out of where the crud usualy flies. Never had an issue even in water as deep as 40 inches. I have seen plenty of trucks with open elements soak down the element and stall the engine and even have steam comming out of the tail pipe from the water they pulled through open element filters.

    Diging it in the dirt with my K5's
    Grim-Reaper
    <A target="_blank" HREF=http://grimsk5s.coloradok5.com/>http://grimsk5s.coloradok5.com/</A>
     
  5. CaptCrunch

    CaptCrunch 1/2 ton status

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    I agree w/ Grim... hot air and power aren't in the same sentence. The cooler air you can get the better. I plan to get a dual snorkle setup, take out the stock piece that goes through the wall behind the grill and cut it open, put a screen across it, and get another one and put it in on the otherside for the second snorkle. Check out these guys for the dula snorkle kits
    <A target="_blank" HREF=http://www.ramairbox.com/home_page.html>http://www.ramairbox.com/home_page.html</A>

    [​IMG]
    1987 Chevy K5 Blazer- 350 TBI
     

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