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functional hood scoop/ram air

Discussion in '2nd Gen. Tacomas (2005-2015)' started by 75thrangertaco, Jun 12, 2010.

  1. Jun 12, 2010 at 10:45 AM
    #1
    75thrangertaco

    75thrangertaco [OP] Sua Sponte! RLTW

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    procomp 6 inch co lift ,305/55/20 xtreme a/t tires,4.88 gears ,,grill shell painted white billet inserts.Trd cat back ,
    i have two sport hoods one is really hail damaged i was ttoying with the thought of making a ram air box for na and supercharged tacos, just wondering what your thoughts are on it. i will mock up some designs and post up tomorrow. i want to make it smooth and factory looking. does anyone have a stock air box they want to donate?
     
  2. Jun 12, 2010 at 10:48 AM
    #2
    jodiddly33

    jodiddly33 Well-Known Member

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    Are you talking bout making the scoop functional? If so, it won't work, the scoop is in a low pressure area on the hood
     
  3. Jun 12, 2010 at 10:48 AM
    #3
    Brunes

    Brunes abides.

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    That hood scoop is in a high velocity, low pressure area of the hood. It's not high enuf to get out of the laminar flow to catch extra air, and the engine bay is full of high pressure, low velocity air.

    SOOO...It won't do quite what you are hoping it will.
     
  4. Jun 12, 2010 at 11:05 AM
    #4
    Wattapunk

    Wattapunk Stay lifted my friends !

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    X2..There has been several informative threads on the sport hood scoop. Unfortunately, it's only for looks unless your design involve raising the height at least 6 inches or more..

    [​IMG]
     
  5. Jun 12, 2010 at 11:14 AM
    #5
    ::childstoy::

    ::childstoy:: Hi-Tech Rednek

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    :mad: This upsets me...
     
  6. Jun 12, 2010 at 11:20 AM
    #6
    75thrangertaco

    75thrangertaco [OP] Sua Sponte! RLTW

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    procomp 6 inch co lift ,305/55/20 xtreme a/t tires,4.88 gears ,,grill shell painted white billet inserts.Trd cat back ,
    me too.i really dont understand, i installed a glass hood on the stang and the scoops are a little lower than the trd sport hood, with just that mod i saw a seven hp increase on the dyno with a stock engine using the stock airbox modified of course .. looks like ill have to rig up the redneck wind tunnel next weekend, im gona do some research. maybe rig up a chevy maf to my scanner and see what kind of flow i can get thru the scoop...
     
  7. Jun 12, 2010 at 11:25 AM
    #7
    ::childstoy::

    ::childstoy:: Hi-Tech Rednek

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    Gotta respect the perseverance! Do it up bro... let us kno.

    Id love to see a way to make this work.
     
  8. Jun 12, 2010 at 11:28 AM
    #8
    75thrangertaco

    75thrangertaco [OP] Sua Sponte! RLTW

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    procomp 6 inch co lift ,305/55/20 xtreme a/t tires,4.88 gears ,,grill shell painted white billet inserts.Trd cat back ,
    engine bay pressure shouldnt matter, im talking about a closed system directly to the intake (filtered of course),the intake tract when sealed other than the inlet is always negative pressure while the engine is running, all we need is high velocity , why would it matter if the scoop was in a low pressure area? the intake tract will always be in a state of vacume.which is much lower than any amospheric pressure.
     
  9. Jun 12, 2010 at 11:29 AM
    #9
    Wattapunk

    Wattapunk Stay lifted my friends !

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    Has alot to do with the shape of the front end of our Tacos. Not much air flow at the hood scoop level once air flow passes over the front end and to the windshield. Ever drive on the highway and see a bug or leaf sitting on the scoop area and not move? Anyways, I would love to see your design, I really do hope it works. You will have alot of interests from us with sport hoods..Good luck!
     
  10. Jun 12, 2010 at 11:31 AM
    #10
    Brunes

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    Low pressure = less air molecules.
     
  11. Jun 12, 2010 at 1:45 PM
    #11
    75thrangertaco

    75thrangertaco [OP] Sua Sponte! RLTW

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    hmmm, well if this dosent work,ill make a ram air that fits into the lower valance and try that. im just stubborn lol,and bored. every once in a while i get the bug to make things or improve on things,i made a ram air for one of my mustangs by removing a foglight and using some dryer duct, crude yes, a consistant tenth of my quarter times, priceless. that was when i was 18 i dont do crude mods anymore just ideas to make our tacos stronger , faster and better...
     
  12. Jun 12, 2010 at 2:49 PM
    #12
    Kyouto42

    Kyouto42 Iron Beard

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    Yea, low pressure = less air which = less oxygen to burn. Bad enough for N/A, even worse for FI.

    Really about the only 'useful' thing you can probably do is open it up to allow heat to escape the bay easier...
     
  13. Jun 12, 2010 at 2:55 PM
    #13
    rab89

    rab89 Well-Known Member

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    I wonder if making the scoop taller, and getting it into the high velocity and high pressure air that right now flows over it. Maybe thats why the STI scoop is so big?
     
  14. Jun 12, 2010 at 3:07 PM
    #14
    jodiddly33

    jodiddly33 Well-Known Member

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    I think if you made the scoop taller it just wouldn't look right...not on a truck...but if it was closer to the front of the hood maybe?
     
  15. Jun 12, 2010 at 3:25 PM
    #15
    75thrangertaco

    75thrangertaco [OP] Sua Sponte! RLTW

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    Hmmm.and once upon a time the world was flat!
     
  16. Jun 12, 2010 at 4:24 PM
    #16
    Kyouto42

    Kyouto42 Iron Beard

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    The STI also doesnt' throw air up above the scoop with it's massive front :p

    Plus, it's scoop only runs air over the top mount intercooler... which is pretty stupid to start with. FMIC is much better, because heat rises from the engine which will drive the top mount cooler's temps up.
     
  17. Jun 12, 2010 at 10:39 PM
    #17
    tcoe99

    tcoe99 Well-Known Member

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    if one was to block the opening in the front pass inner fender would that affect the air flow? just wondering cuz i did. mud gets in there and weighs my bumper down causing it to fall down!!
     
  18. Jun 16, 2010 at 9:06 PM
    #18
    rab89

    rab89 Well-Known Member

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    yea fmic would be better in most applications, but the idea is to have the intercooler and turbo setup with as little piping as possible, making the turbo lag virtually disappear. From what I hear, they did a great job getting rid of the turbo lag. but that's for a different thread haha.
     
  19. Aug 2, 2010 at 9:47 PM
    #19
    Bobo_1

    Bobo_1 Well-Known Member

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    School me on why high velocity == low pressure. If the scoop is capturing that high velocity air then why would it matter what the pressure is if it is indeed ramming/entering the scoop? Is the very front of the hood high pressure? That is where I have place my ram air system on my cars and they work well.
     
  20. Aug 2, 2010 at 9:51 PM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Its a low pressure area. Try this......SPray water on the hood, and see how fast you have to drive before it blows off.... I have been over 50 mph, and the water drops just wiggle. The air flowing over the hood is not strong enough to break the cohesion the water has on the hood. The scoop is too small to allow for any real flow into the intake. To get the intake to pull air from that location, you would have to fabricate a new intake with enough curves, and restrictions to impede/nullify any theoretical gains. AND.....A Cars aerodynamics are MUCH different than a trucks.
     
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