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Thread: Full throttle fuel table changes.

  1. #1
    Supporting Member II Turbo Mopar Contributor jeff1234's Avatar
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    Full throttle fuel table changes.

    My understanding is that if you change any point on full throttle fuel table it changes the entire table up or down. Why isn't only that point changed singularily?
    The only substitute for cubic inches is cubic dollars, how fast can you afford to go?

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    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: Full throttle fuel table changes.

    I think you may be confusing the pumping efficiency table with the fuel full throttle table. The full throttle table does change the fuel at that point to my knowledge.

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    Supporting Member II Turbo Mopar Contributor jeff1234's Avatar
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    Re: Full throttle fuel table changes.

    Cordes, are you saying that changing PE at a single point does changes more than that single point?
    The only substitute for cubic inches is cubic dollars, how fast can you afford to go?

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    Rhymes with tortoise. Turbo Mopar Staff cordes's Avatar
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    Re: Full throttle fuel table changes.

    Quote Originally Posted by jeff1234 View Post
    Cordes, are you saying that changing PE at a single point does changes more than that single point?
    No, it still only changes the pumping efficiency at that RPM. However, the pumping table is an overall multiplier which effects the other fueling tables. Frankly, I'm unaware of any table which has a point that effects all other points in said table.

  5. #5
    Boost, it's what's for dinner... Turbo Mopar Staff Aries_Turbo's Avatar
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    Re: Full throttle fuel table changes.

    i think i know what you are getting at because of what i told you.

    if you change a point, say 15psi, on the FuelFullThrottle table, it changes the fueling for all RPM's that the engine is seeing 15psi.

    that why i told you if you were rich at a single RPM, adjust that RPM in the pumping efficiency table.

    if you are rich at many RPM's at a certain boost level, then adjust via FuelFullThrottle.

    Brian

    Quote Originally Posted by turbovanman
    This one is easy, I have myself to blame, I rush things, don't pay attention to gauges when I should, change to much stuff at once then expect miracles, the list is endless.

  6. #6
    Moderator Turbo Mopar Staff Force Fed Mopar's Avatar
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    Re: Full throttle fuel table changes.

    Changing one point only affects fueling at that point and the area around it, not the whole table. IE, change fuel at 15 psi without changing it at, say 12 and 18, the slope on either side of 15 will be slightly changed as well, but not outside the 12-18 window.

    You can scale a whole table up or down by right clicking, then selecting scale table. Use the Y axis.

    Simply put, if the AFR changes due to rpm, modify the Pumping Efficiency table wherever needed. If it changes due to pressure, modify the FuelFromMap tables wherever needed. If it's rich at idle, modify the FuelBaseline table at your idle vacuum reading.
    Rob M.
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  7. #7
    Supporting Member II Turbo Mopar Contributor jeff1234's Avatar
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    Re: Full throttle fuel table changes.

    Thank you all, i will continue to work on this.
    The only substitute for cubic inches is cubic dollars, how fast can you afford to go?

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