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fresh air

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by beater74, Jul 26, 2001.

  1. beater74

    beater74 1/2 ton status

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    how many of you run a fresh air intake and who runs open element air filters. I run an open air filter now, but have done some salvage yard searches to make a custom fresh air intake set up. I'm just not sure where to run the air pick up to, the radiator suport, or the cab, is it loud in the cab if it's run there, or i even got some parts from a fiero's intake so i could run the pickup to the drivers fender and it would look kinda kool to. just looken for some input befor i start cutten holes in my truck.
     
  2. ftn96

    ftn96 1/2 ton status

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    Stephen at ORD runs his into the cab I think. You'll need to ask him how loud it is. Seems like the inside would be the best. But anywhere you can get some good cool air.

    Did you say I have monkeys flying outta my butt?[​IMG]
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  3. Pugsley

    Pugsley 1/2 ton status

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    I run an open element with a pre-filter. I used to have a home grown fresh air setup, but there's so damned much silt around here, I was plugging up the filter every 2-3 weeks.

    Generic Signature
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  4. muddin4fun

    muddin4fun 3/4 ton status

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    I've got an open element with a prefilter wrap. I'm trying to think of a way to get cooler air inside. The headers heat up the engine compartment a lot!

    I've got a mind like a . . . a . . . what's that thing called?

    <a target="_blank" href=http://www.geocities.com/muddin4fun79blazer/>http://www.geocities.com/muddin4fun79blazer/</a>
     
  5. beater74

    beater74 1/2 ton status

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    i'm have a small problem with pining at high rpms because i'm running 10:1 compression and 4 deg's above tdc. so one recomended cure was to run fresh air. well i got whole big box of parts from yhe local pullapart to peace meal a intake together, so keep ypur ideas a com'n and i'll post some picks of the winning idea
     
  6. CrazeeBush

    CrazeeBush 1/2 ton status

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    well, the factory snorkel runs over to the punchout on the passenger side right beside the radiator. There is a punchout on the driver side as well. open up both holes cut a hole in the stock breather and run 2 tubes , 1 to each side. If you're in an area where it's real dusty, put some sort of prefilet right at the opening's on the radiator support. That's my $.02



    -BuSH
    '83 K5 Blazer
    '98 Monte Carlo z34
     
  7. muddin4fun

    muddin4fun 3/4 ton status

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    What grade fuel are you running?

    I've got a mind like a . . . a . . . what's that thing called?

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  8. beater74

    beater74 1/2 ton status

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    only 93 oct can't run no lower or it pings like S**t. i'm also fixen run ngk plugs to try and help the pinging also. I was told by our head fleet mech that none of this will help and that it's all in my carb (freshly rebuilt) (edlbrock)but until i can get one someone who can look at the carb and knows what to do i'm gonna try this because ,one, it's cheap and ,two, i can do this myself and ,three, alittle fresh air never hurt anybody. what's ya think
     
  9. muddin4fun

    muddin4fun 3/4 ton status

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    I think that maybe you should mess with your timing some. Maybe your motor doesn't like where you set it. I'm running 9.75:1 compression and she runs great on 89. I would think you should be able to run 93 without pinging. I really think you should mess with your timing some more and find where the motor likes it the best.

    I've got a mind like a . . . a . . . what's that thing called?

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  10. beater74

    beater74 1/2 ton status

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    nope i've had it all the way down to 0 deg and that helped but sucked as for performance. I would like to bring it back up to 8 deg. above tdc where it should be (around there). but not with it pinging like that.
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    I don't think I'd want the setup in the cab. When you shut off an engine, alot of times you'll get vaporized fuel going into the air cleaner. It should do a good job of removing or condensing most of it, but most people would get pretty tired of smelling gas every time they turned the truck off. Just a thought, not sure how bad it would really be. Backfire would be horrid too.

    You could also *shudder* cut holes in the firewall/cowl area, where the windshield wiper area is. big waste of space there, and it is cool air, and should get some additional "cowl induction" ramming benefits. But I don't like cutting holes, so I like, and will, use the factory cutouts on both sides of the core support, with a dual snorkel factory cleaner.

    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
     
  12. dyeager535

    dyeager535 1 ton status Premium Member

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    BTW, if you are pinging, double and triple check your engine temps. My car would ping horribly when the temps would get up around 220, even with 8:1 compression.

    10:1 is typically too high for 87 octane and stock older heads, but even the 305's in the 80's were running 9.5:1 in some cases, and the recommended fuel was only 87 octane.

    9.5:1 on most heads is easy to run on 87 octane, IMO your truck should be running 89 octane no problem. You've got another problem alright, but I don't *think* its in the carb. If you are running it lean enough to heat the motor up too much, maybe. Other than that, I don't believe the carb has any effect on pinging or not. Have you also checked to see that the dist. mech. advance weights aren't sticking?

    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
     
  13. baldbandit

    baldbandit 1/2 ton status

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    I have also been wondering this about how to get cold air to my intake. I am converting my 6.2 diesel to a gas. I'm using the 6.2 radiator which covers the punch out on the drivers side. So that deletes that idea of a dual snorkel to the radiator. Something i was thinking about, i plan on buying a steel cowl hood, and was going to see how hard it would be to install a air cleaner from a 70's vette. This set up has a rubber seal around the air cleaner that seals to the hood and pull its air from the windshield area, via the cowl hood. Any thoughts? how about any other ideas?

    baldbandit

    "Have you driven over a F@RD lately!!
     
  14. Bubba Ray Boudreaux

    Bubba Ray Boudreaux 1 ton status

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    I run open air on my TBI. It's okay, but this is what I would like to do. Have a air cleaner housing built and have twin tubes running to it from the two openings in the front. I want these tubes to be totally smooth so the air flow isn't upsetted by any harsh turns in the surface. Thinking about this, it would seem like that the housing would have to be at least tall as the opening diameter facilitating a taller air cleaner. Anyone out there into fabricating stuff like this? Just curious what a setup like this would run me. If you caught last month's Off Road, they had a nifty AC housing in there that could be a starting point.

    "I am Republican. Not a baby-killing, tree hugging, land grabbing, touchy feely, hypocrite wuss democrat!"<a target="_blank" href=http://www.handguncontrolinc.com>www.handguncontrolinc.com</a>
     
  15. dyeager535

    dyeager535 1 ton status Premium Member

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    I think the idea of using a cowl induction setup off something is very good. Cowl hood without actual ducting doesn't do much good. I would check out some Camaro, Firebird, Vette, and Chevelle restoration catalogs for those setups. Firebird not likely, the induction was facing the "wrong way" lol, but they did have the foam sealed to the hood.

    Problem I can see with cowl induction on the trucks would be the height you'd have to have the foam, since the hoods are a pretty good distance from the air cleaner base if you remove the top like you would to fab a cowl induction base. if you could make the base "taller" (hmm, maybe one of the ultra tall 80's truck air cleaner LIDS turned upside down) you could cut down on the height of the foam. prolly worth checking out, but you'll be spending some serious money on parts that you aren't SURE will work.



    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
     

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