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Thread: Return style fuel system (Coyote)

  1. #1

    Return style fuel system (Coyote)

    When switching to a return style fuel system are these the changes that need to be made?



    Set all of the follwing to 1 in the right hand column:

    Flow rate LOW MULT vs. Pressure
    Flow rate HIGHT MULT vs. Pressure
    Offset mult vs. Pressure
    Breakpoint mult vs. Pressure


    The following set to 55:
    Inferred rail pressure
    Inferred rail pressure low

    Secondary monitor: Set to disabled.



    Just want to be sure I am doing this correctly.
    Last edited by Blueprint; 08-11-2016 at 09:15 AM.

  2. #2
    No one?

  3. #3
    HPT Employee Eric@HPTuners's Avatar
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    That should take care of it.
    Eric Brooks
    HP Tuners, LLC

  4. #4
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    With these settings, do you set the fuel regulator pressure with or without manifold reference?

  5. #5
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    I always do it: Engine Running, vacuum line off the regulator.

  6. #6
    HPT Employee Eric@HPTuners's Avatar
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    Set the pressure with the vacuum disconnected, then connect it.
    Eric Brooks
    HP Tuners, LLC

  7. #7
    great info

  8. #8
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    Quote Originally Posted by Blueprint View Post
    When switching to a return style fuel system are these the changes that need to be made?

    Set all of the follwing to 1 in the right hand column:

    Flow rate LOW MULT vs. Pressure
    Flow rate HIGHT MULT vs. Pressure
    Offset mult vs. Pressure
    Breakpoint mult vs. Pressure


    The following set to 55:
    Inferred rail pressure
    Inferred rail pressure low

    Secondary monitor: Set to disabled.



    Just want to be sure I am doing this correctly.
    Why set values to 1 rather than filling the tables with the value that is already there in the 55 psi row?

    I understand the need to make the multiplier value vs pressure constant but I'm not certain that 1 should be the value.
    Last edited by totem; 02-25-2017 at 08:55 AM.

  9. #9
    HPT Employee Eric@HPTuners's Avatar
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    Quote Originally Posted by totem View Post
    Why set values to 1 rather than filling the tables with the value that is already there in the 55 psi row?

    I understand the need to make the multiplier value vs pressure constant but I'm not certain that 1 should be the value.
    Either way will work.
    Eric Brooks
    HP Tuners, LLC