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Thread: RTACS using STFT

  1. #11
    Joe (Moderator) joecar's Avatar
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    Yes, the missing { confuses it.

  2. #12
    Lifetime Member EagleMark's Avatar
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    But when you add it it works SWEET!

  3. #13
    Lifetime Member EagleMark's Avatar
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    Looks like I hit the 2.4145 limits set from EFI Live in a couple cells. What are limits to VE table in g*K/kpa ? I know what limits are in VE%...

  4. #14
    Joe (Moderator) joecar's Avatar
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    Look at B0101... in the upper RHS of the window it shows the min/max allowed cell values.

  5. #15
    Lifetime Member EagleMark's Avatar
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    I saw that for g*K/kpa is 10.

    But was not sure if that was accurate or possible because if I use % the max is 500%... pretty sure 100% is max?

  6. #16
    Lifetime Member EagleMark's Avatar
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    The STFT worked well. Disabled the LTFT as discribed, also EGR, PE, Lean Cruise, DFCO and it was a pretty clean VE table when done.

    Thought I'd try another way using part of the New Twist to Calc VE. Went back and enabled LTFT and used CALC.SELBEN, now that works well!

  7. #17
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by EagleMark View Post
    I saw that for g*K/kpa is 10.

    But was not sure if that was accurate or possible because if I use % the max is 500%... pretty sure 100% is max?
    You can have more than 100% VE... this is what long tube headers can do with NA (I've seen 109% at one of the resonant rpm's)...

    if you add boost then as you correct the VE table you will definitely see above 100%.


    Take note:
    - the tunetool uses cylinder volume to view the VE table when using [%] units;
    - the tunetool ignores cylinder volume when using [g*K/kPa] units;

    it's up to you... but I would rather use [g*K/kPa].

  8. #18
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by EagleMark View Post
    The STFT worked well. Disabled the LTFT as discribed, also EGR, PE, Lean Cruise, DFCO and it was a pretty clean VE table when done.

    Thought I'd try another way using part of the New Twist to Calc VE. Went back and enabled LTFT and used CALC.SELBEN, now that works well!
    Good job post pics of your resulting MAF and VE tables.

    Take note:
    - the VE kicks in during transient airflow... but the transient filter you apply to the map excludes frames where VE kicked in, so you're left with MAF only correction data;
    - the VE is calculated from the corrected MAF (from the same log);

    how does vehicle drive now, how does throttle respond (be objective)...?

    the procedure is fairly easy, wouldn't you say...?

    and you even got it going for Vortec (which lacks various definitions and pids), good job well done


    Thanks for posting back, I really appreciate the feedback.

  9. #19
    Lifetime Member EagleMark's Avatar
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    Quote Originally Posted by joecar View Post
    You can have more than 100% VE... this is what long tube headers can do with NA (I've seen 109% at one of the resonant rpm's)...

    if you add boost then as you correct the VE table you will definitely see above 100%.


    Take note:
    - the tunetool uses cylinder volume to view the VE table when using [%] units;
    - the tunetool ignores cylinder volume when using [g*K/kPa] units;

    it's up to you... but I would rather use [g*K/kPa].
    I am using g*K/kpa, you don't think Im ignoring your advice do you? AFR is also gone, Lambda for wideband and EQ for data. It takes a little while to brake OBDI tuning habits. Like VE can never go over 100%, 90 to 95% injectors go static! Differant worlds in MAF...
    Last edited by EagleMark; January 25th, 2013 at 08:15 PM.

  10. #20
    Lifetime Member EagleMark's Avatar
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    Quote Originally Posted by joecar View Post
    Good job post pics of your resulting MAF and VE tables.

    Take note:
    - the VE kicks in during transient airflow... but the transient filter you apply to the map excludes frames where VE kicked in, so you're left with MAF only correction data;
    - the VE is calculated from the corrected MAF (from the same log);

    how does vehicle drive now, how does throttle respond (be objective)...?

    the procedure is fairly easy, wouldn't you say...?

    and you even got it going for Vortec (which lacks various definitions and pids), good job well done


    Thanks for posting back, I really appreciate the feedback.
    I'll post more as I said I would, it's the least I can do for all the help you have given. Maybe you haven't noticed all I share back elsewhere... Would have been a lot easier to start without the Vortec and then the wideband issue?

    Yes it's easy once you catch up to procedures!

    But it's all coming together now.

    how does vehicle drive now, how does throttle respond (be objective)...?
    Crisp!

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