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Thread: Injection timing

  1. #1
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    Injection timing

    Ok guys took longer than id like to admit but i believe i figured this injection timing stuff out.
    Have a couple more questions.

    Using Eds tutorial i graphed a few scenarios.
    In his tutorial he explains limiting WOT SOIT to around
    -100? to keep the next injection cycle out of the last cycle.
    In my case that would result in larger inectors to limit the pulswidth and injection duration.

    My question is what would happen if i did not change injectors?

    What the heck do you do with the makeup table?

    And the normal table ive been modifying the operating temp ranges (140? and up). Do i modify the lower temp ranges with the same calculated differences.
    1997 30th SS. Torqhead 24x, TFS heads, 223/235 cam, 4l80e, S60 D1SC 14psi

  2. #2
    Senior Tuner cobaltssoverbooster's Avatar
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    the gains from eoit control are at idle and through the mid range. typically the wot high rpm stuff will not be that much of a gain so as long as your injectors arent exceeding around 85 % then you should be fine.
    2000 Ford Mustang - Top Sportsman

  3. #3
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    Good to hear. In currently around 80%. I have another set going in with better data so well see if that changes.
    I was just curious if there was any effect on being slightly above that -100 Ed recommend?
    1997 30th SS. Torqhead 24x, TFS heads, 223/235 cam, 4l80e, S60 D1SC 14psi

  4. #4
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    Would you usually set the makeup table the same as whay you change the operating temperatures under the normal?

    Say the normal for a stock vehicle is 5.55 and the makeup is 5.55 across the board. If i changed my 5.55 on the normal to say 6.0 do u change the makeup to 6.0 also?
    1997 30th SS. Torqhead 24x, TFS heads, 223/235 cam, 4l80e, S60 D1SC 14psi

  5. #5
    Senior Tuner cobaltssoverbooster's Avatar
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    although its likely the wrong way to do it i make them the same. its only for the makeup pulses which atone for a small amount of the spray. if you have the time verify any gains through the dyno as usual or by verifying o2 error trends per adjustment.
    2000 Ford Mustang - Top Sportsman