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Thread: Vtec and ITBs

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    Bodger pinto 2.0's Avatar

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    Vtec and ITBs

    Seeing all the conversions done with itbs has me wondering, when you for aftermarket ecu, lets say omex for example can the vtec still be used. i know vtec is worked off oil pressure but doesnt the timing get advanced/retarded when it hits vtec?

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    Pit Crew Decade Plus User

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    Re: Vtec and ITBs

    Most ecu's will have a vtec ( vvti ) function, I'm quite sure Omex does, the benefit of the setup is you can control when it comes on rather than the usual hard hit you get from it.

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    World Champion caprimentle's Avatar

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    Re: Vtec and ITBs

    but dont the honda boys usually use hondata? i know thats when they're usually keeping the single inlet plenum but not much is gained strangely enough going from a single tb to individual tb's on the honda vtecs.
    its not dead till it's buried!


    T.I.T engineering. "Feel the power!"

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    Re: Vtec and ITBs

    It is oil pressure and a 12v output signal from the ECU which brings in the Vtec.

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    Mechanic

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    Re: Vtec and ITBs

    Omex 600 can definately operate vtec or vvt. Its runs vvt on my 20v 4age via a relay.
    RWD Escorts - Making the competition look like c**ts since 1968!

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    Bodger evobda2's Avatar

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    Re: Vtec and ITBs

    who buys ITB's for power.. surely its just for sound!!
    Last edited by evobda2; 14-05-2012 at 10:45.

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    Bodger

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    Re: Vtec and ITBs

    Omex can control the F20 motor easily as its only a switched output to engage vtec solenoid, the K20 motor has 20 vtec maps that it passes through that the likes of Omex wouldn't support, I would use a plug and play solution like Kpro that uses the oe wiring and std ecu with daughter board, the fitting of the itbs would just be a straight forward to map then!

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    Bodger

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    Re: Vtec and ITBs

    Hmm. This is in the S2000 section. The S2000 doesn't change cam timing, it changes cams.

    (There are 2 profiles in there when you look under the top). I'm currently wondering why I need the small cams given the oil pressure issues that come with the hydraulic switching (but that's another story).

    I know nothing about Civic VTECs, but am under the impression that they are more sophisticated, and cam timing driven. I have spoken to clever B*ggers who talk about mapping out the civic dead spot. They were telling me that they got massive mid range drivability out of it (with a Honda specific strap on / emulator). I can confirm that I only ever saw the back of that civic (disapearing away from me in competition).
    Rich B
    (I wish I was)

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