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Thread: plenums

  1. #1
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    probs the rong section for this, but ahh. fuck it.

    after soem pics of peoples intake manifold/ plenum there running with quad throttles, or of any pics people have.

    as i am making my own this week any help would be muchly apreciated.


    i am thinking ill use some 4" pipe with a 2.5" inlet on the bottom of the pipe and have 4 2" 90 degree bends coming out of the 4" pipe and into the throttlebody's.

    hopefullying it shal go aight, there fore, i can chirp 2nd with a big swing up.


    yeaz?

  2. #2
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    yep i'm doing mine kinda similar way

    4" pipe cut down the middle, 3" inlet

    pic below isnt quads, but what i wanna do

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  3. #3
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    i just read the '90 degree bend' thing, i dont think that would work .. but a smaller angle (20-45degree) might..

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    cheers dude, yeah i need a fair angle so it will clear the brake booster and cluth slave that all. ill try it with a 45 deg bend, hopefully that will work. and i think ill use 3" instead of 4".

    and another thing man, its bolting onto the throttlebodies not the inlet ports, so 90 should even be alright, no diferent to a 90 deg bend in your cooler pipes.

    but yea. see how i go i suppose

  5. #5
    Gunner
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    try and incorporate velocity stacks in the plenum, from my experience, it makes a fairly decent difference

  6. #6
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    Creating plenums for quad throttle 4AGE's seems to be the new fad - they are all over the forums lately!

    What advantages does using a plenum on quad throttles provide? I would have thought if anything it would just restrict the amount of air available to the throttles? I understand boosted engines using plenums but dont get it on n/a's. I'm no expert which is why I'm asking, can someone enlighten me? Unless these are all boosted engines using quads?

  7. #7
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    <div class='quotetop'>QUOTE (HighLife @ Sep 24 2008, 12:52 PM) </div>yeah, all are boosted
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  8. #8
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    yea ive got trumpets for n/a setup but im boosted, hence why im making a plenum

    i probs wont have trumpets in it but ill make somehting to do the same effect .

  9. #9
    Gunner
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    ??? or is it a secret

  10. #10
    Senior Member Sprinter86's Avatar
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    There was a pretty neat looking one on ebay a couple of days ago, bolts on to silvertop quads, had velocity stacks and stuff aswell.
    The price turned me off at $575 though

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