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Thread: 16V ITB Conversion

  1. #1
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    Default 16V ITB Conversion


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    The title is pretty obvious and now time for a noob question:

    What do i need?
    I have the 20v black top quads.

    The t3 adapter plate for my bigport is on order
    along with the vaccum plenum and gold velocity stacks

    What else will i need?

    i was reading and trying to research this and came across the phrase tps
    now im getting worried
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  • #2
    Senior Member julzy's Avatar
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    the tps, throttle position sensor is on your quads,
    but you need a plug to make it work.
    You will also need to get vaccum lines and T peice connectors.
    Quote Originally Posted by resol View Post
    i slide 3rd gear corners in the dry on the street, and 100km/h entry's.

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    thanks any idea where i can get one?
    amything else you can think of people that im missing i just want to give the guy the parts
    and tell him "1 week"

    lol

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    User fantapants's Avatar
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    meh do it urself ... not that hard really... plenty of threads on how to floating round
    RIP Carly - a smile to light the world.
    06/07/2011

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    http://www.twincam.info/index.php?showtopic=26291

    from another forum, but this may help you

  • #6
    Veteran Jonny Rochester's Avatar
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    From what you have in the picture, you only need the throttle bodys themselves. You also have there in the picture the 20v intake manifold, which contains the balance tubes and injectors. You don't need this, but don't throw anything away.

    Doing the conversion, there is some stuffing around making the throttle cable setup. It gets hard if you are missing some of the linkages. And even harder if the throttles are mounted up-side-down, which some manifolds do. KE70 or KE55 throttle cable should work either way.

    I take it you already have a aftermarket computer? This is needed.

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    Wait i get it lol
    Last edited by The Enthusiast; 8th April 2009 at 12:34 AM. Reason: Im a dickhead

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    Veteran dori_86's Avatar
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    side note>

    how hard is it to tune these? (assuming u have some sort of aftermarket comp)

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    Veteran Jonny Rochester's Avatar
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    Easy and hard. "Tune" can mean so many different things. If the computer is wired up 100% and the motor is good and connected to water and oil etc... and you are left to only do the software tuning... it should be easy. But then again, if you have some software bug or unknown problem, it could take weeks or only seconds to sort out.

    As for quads vs single throttle, not a big problem. Easy enough to tune.

    The problems are:
    1. having the throttles bolted on the motor with no vacuum leaks.
    2. having all 4 throttles in sync, closing and opening together. Getting full throttle, and snapping closed for idle.
    3. Getting an accelerator cable the right length, no friction, to provide full throttle plus idle. Can be tricky to set up at times. Sounds simple.
    4. TPS wired to ECU. Calibrate ECU for new TPS.

    To get an idle, you can choose to have the throttles cracked open slightly. Or you can choose to have the throttles snapped shut, and screw the air bleed screws all the way out. All 4 or them. Or, you can run a factory idle speed motor thing connected to your vacuum chamber, controled by the ECU.

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    cheers jonny! always wanted to got quads but the tuning always sort of held me back

    btw i have a smallport bottom end and a big port head and want to keep a street set up (ie more more response/acceleration than top end) would u suggest leaving the cams for now or should i look into getting some at the same time?

    >sorry for the hijack

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