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Need opinions on air-intake

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Derf00, Aug 2, 2002.

  1. Derf00

    Derf00 1/2 ton status

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    Now that my engine swap is complet, I am not totally satisfied with my airfilter set-up. Taking into consideration I will soon have a cowl-induction hood, what are some other options other than the open element, or stock set-up? I am presently running an open element, but change to stock if I off-road and know I will be in water or mud.
     
  2. dyeager535

    dyeager535 1 ton status Premium Member

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    My *opinion* on the subject of air intakes is pretty simple. There are few, if ANY on this board who can suck more air than the 750 or 800CFM Q-jet can provide.

    Anyone that is good with math, calculate possible airflow through a 2"x4" opening, which is what a stock '81-up gas setup is at its narrowest. (I think the only stock setup worth using is the '81 up ducted snorkel)

    I think open air cleaners are a waste. Once again, if your motor can flow more than the stock air cleaner setup can, then you might need one. Don't forget, you are sucking in hot engine air, and not having my Roe book here which states this, its (I believe) an average of 1HP lost per every 10* increase in inlet air temp. An engine bay can easily reach 120+* with ambient temps of 80*.

    No offense, but if the cowl isn't functional, its worthless. A well sealed, functional cowl hood (forcing cold, clean air into the engine) is awesome, but a hole in the back of the hood that you can look in, for the sake of looking, is pointless. Thats a low pressure zone, and engine heat will NOT escape there while moving.

    You guys that run in deep mud and water, I can understand your problems with the stock or open filter setup. I might consider turning the stock snorkel around, and mounting a flange on the cowl, where the windshield wiper mechanism is hidden. I'd imagine this would be a GREAT place to take in air, and it would be fairly safe from water coming over the hood.

    There was a time that I thought the more air the better, but the simple fact is, if the engine can't use it, and its not cold, you are wasting your time.

    Now if this doesn't generate some replies.... : )
     
  3. Derf00

    Derf00 1/2 ton status

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    Dorian,

    Thanks for your input, I knew if you answered my post I would have some good info. You have convinced me to put the stock air cleaner back on and the duct to the front to p/u some cooler air.

    With respect to the cowl hood, I know that if it functions, the cowl induction can be an awsome setup.
     
  4. wrathORC

    wrathORC 1/2 ton status

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    You seem to be the guy to ask.. I put a front clip from an 89 Jimmy on my 84 pickup. Where did the Jimmy get its air from? There are no holes in the core support. I had both front fenders (the passenger side one is on my truck now) but there was no sign of ductwork going to a fender.

    I admit to it, I don't have a clue. I've been running without a tube since March when I put the front clip on. I'd really like to be sucking in some cold air during the summer so any help would be appreciated.

    I also took some pictures this morning in case they can help you. http://www.wrath.com/projects/vehicles/images/84k10/underhood-080302/

    Thanks
    -Brian
     
  5. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Along side of the radiator. They have some wierdo long tube deal that runs down the side of the rad where those little holes are at in the support on the passenger's side.
     
  6. wrathORC

    wrathORC 1/2 ton status

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    Well, at least now I know what those holes are there for and why they didn't put the coolant reservoir there.

    I have the Jimmy's reservoir somewhere, where did they put it? I forget. I can't put it on the driver side where the battery tray is because I put a battery tray (waiting for batteries to go on sale so I can put a second one in my truck) there.
     
  7. BurbinOR

    BurbinOR 3/4 ton status

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  8. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    They put it in on the passenger side wheel well. I think they started that in '85 or so. I refitted my '83 shortbox to the new style, much easier to work with.
     
  9. Derf00

    Derf00 1/2 ton status

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    Very nice, that is what I am looking for. /forums/images/icons/grin.gif /forums/images/icons/grin.gif
     
  10. wrathORC

    wrathORC 1/2 ton status

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    So that must be why they moved the jack to the other side, eh? I moved my jack to the driver's side but I kept my puke tank under the battery tray on the passenger's side. Someday I had planned on putting a small toolbox on the passenger side wheelwell.

    I guess I'll have to figure out my own induction system. 89-91 Blazers/Jimmys are few and far between around here and there are none in any of the local junkyards that I'm aware of.

    Thanks
     
  11. NITRO

    NITRO 1/2 ton status

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    or u guys could do what i did....make a snorkle for it. it works awesome and also acts as a forced induction system. its a pretty sweet setup. and it didnt cost me a thing cause its built not bought.

    NITRO
     
  12. stump_puller

    stump_puller 1/2 ton status

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    Got pics of your snorkle setup?
     
  13. NITRO

    NITRO 1/2 ton status

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    yea, ill post in a few hours

    NITRO
     
  14. NITRO

    NITRO 1/2 ton status

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    here is the addy to my sit with the pics.

    http://www.geocities.com/yz80foxracer/snorkle.html

    The pipe is 4" PVC painted black and to bend it, i just used a propane torch. this turned out so perfect. o yea, the silver pipe is dryer hose, and the 90* bend that goes into the quarter panel is corrugated gutter pipe. i also have chicken wire and a special filter to catch mud and water. i will b puttin in a T pipe to catch all the water. ill keep u guys updated when i get finished.

    NITRO
     

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