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Thread: What does "crank Refs" mean?

  1. #1
    Tuner in Training
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    What does "crank Refs" mean?

    I'm looking at DFCO settings and under "DFCO Entry Spark", "Blend Time" it says that the numbers in the table are the number of crank refs that it takes for....

    What is a crank ref? I assume it is a certain number of degrees of crank rotation, but how many? Or am I completely wrong?

    Rob

  2. #2
    Tuner in Training Engnineere's Avatar
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    Aug 2021
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    Really wish someone could answer this, I'm struggling with the exact same problems.
    2007 Saturn Sky 5M LE5
    - K04 Turbo
    1992 Eddie Bauer Bronco 351
    - Too much to list

  3. #3
    Tuning Addict blindsquirrel's Avatar
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    Typically, 'reference' means the significant part of the pattern in the reluctor wheel that tells it where it is. It's called that and not something like 'TDC' because there's an offset between the reference notch and actual TDC (it sees the reference notch, then counts a certain number of pulses past that to find TDC).

  4. #4
    Tuner in Training Engnineere's Avatar
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    Aug 2021
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    Ahh thank you for the clarification! So is it a stupid question to ask how many crank refs there are per revolution (I'm assuming there's only 1)? I'm trying to find out exactly how long my delay for DFCO is if it's measured in crank refs.
    2007 Saturn Sky 5M LE5
    - K04 Turbo
    1992 Eddie Bauer Bronco 351
    - Too much to list