If we havent got Air box what would happen to fuel pressure? So why are we need to Air box for regulate the fuel pressure, just fuel pressure regulator is not sufficent to regulate to 2.9-3.2 bar fuel pressure. According to manuel airbox and fuel rail have a diffrential pressure and it is create the vacumm effect. But i dont understand how does it working this system. In the ground, during the engine running if we havent got airbox, can we still protect the fuel pressure between 2.9-3.2 bar? Or just we need to airbox in the air?


    by » 5 months ago

    What about the four plug in sensors on an airbox? What are you doing with them? It isn't just about fuel pressure.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

    Thank you said by: UFUK DOĞAN


    by » 5 months ago

    Without the airbox, Fuel Pressure will not be a problem.
    It will always be 3 Bar above atmospheric; Which will be correct.

    The REAL PROBLEM is that without the Air Box, you will not have a Throttle-body on the 912is Engine.
    And without the Throttle-body, there will be No way to Throttle down the engine.
    It will ALWAYS be at Wide Open Throttle (WOT)!

    DO NOT attempt to start the Engine without an Airbox!

    Also, The Throttle body is Spring-loaded to WOT.
    The throttle must be intentionally closed or the engine WILL go to full power immediately on startup!

    Be sure you understand the implications of what you are doing.
    What you are considering is extremely dangerous!
    The threat of Fatal consequences is not an exaggeration in this situation.

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

    Thank you said by: RotaxOwner Admin

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