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  1. #1
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    question about calculations

    Tuning question using APR Mobile and measuring injection on time I get 9.897 ms at 4846 rpm this is work out to 4846/60 = 80.7 rps injector fires every other rotation 80.7/2 = 40.35 720deg rotations per sec. 1/40.35 = 720 degress every 24.78 ms. 40% duty cycle?

    OR and 7.269 ms at 7003 rpm 42%

    This seems low to me for WOT

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    Click here to enlarge Originally Posted by Lizotte Click here to enlarge
    Tuning question using APR Mobile and measuring injection on time I get 9.897 ms at 4846 rpm this is work out to 4846/60 = 80.7 rps injector fires every other rotation 80.7/2 = 40.35 720deg rotations per sec. 1/40.35 = 720 degress every 24.78 ms. 40% duty cycle?

    OR and 7.269 ms at 7003 rpm 42%

    This seems low to me for WOT
    The midrange is high. 10ms is more or less the limit.
    7 ms is happy place, is your fuel system upgraded? It may be so low at the top because you dropping boost and peaking in the midrange.

  3. #3
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    My Low pressure is low think I got stuck with a 6.4 bar filter, swapping it tomorrow, I have an upgraded HPFP.

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    What I am looking for is, are my calculations right or am I doing it incorrect.

  5. #5
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    I'm not even sure what we are talking about here.

  6. #6
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    Duty cycle of injectors Lizotte is calculating and suspects it is lower then normal
    Some people live long, meaningful lives.

    Other people eat shit and die.

    I'm not racist, I hate everybody equally; especially fat people.


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