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Thread: Need some help with Calc VET

  1. #1
    Lifetime Member HellKnightHicks's Avatar
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    Default Need some help with Calc VET

    I have an LS1B ECU

    In a 1996 chevy c1500 extended cab.
    Plan on moving to a COS and installing a super charger.

    Ive tried to follow

    https://forum.efilive.com/showthread...in-single-log)

    After getting PIDs added to the custom user files.


    Uppon logging and using the tables the values do not appeart to be replacements for the VE table.

    Im not really clear on what I've done wrong to make the tables so.... um unusable.Click image for larger version. 

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ID:	20787Click image for larger version. 

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ID:	2078896 White truck _0009.ctzFirst VE Run.efi

  2. #2
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    your VE is in percent of theoretical maximum in the v7.5 tune tool.


    go to edit -> properties -> display tab -> change volumetric efficiency values to 'default units (g*K/kPa)'

  3. #3
    Lifetime Member HellKnightHicks's Avatar
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    When i do that and paste the labels my data in the EFILive scan 7.5 becomes sued.Click image for larger version. 

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    For anyone reading when you change the Units in the EFILive tune you must close and re-open. For the VE table to display in the new units.

  4. #4
    Lifetime Member HellKnightHicks's Avatar
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    Heres a copy and paste with labels and the Scan tool set to MAP PSI.

    Somethings totally wrong here.

    Click image for larger version. 

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  5. #5
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    your scan settings look fine.

    Your tune settings look like they are still in %VE.

    when you see a VE table with numbers in the range 1-3, it is probably set to standard units, g*Kelvin/kPa. If you see numbers that are in the 40-90+ range, it is in %VE. In your screenshot within post 4, your tune program is still set to %VE, therefore the scandata you are trying to paste in it is not in compatible units. you need to set your VE table in the tune program to display in standard units.

  6. #6
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    the other problem is you are logging in PSI(imperial), but your tune program is set to kPa(metric).

  7. #7
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    also- the labels for axis data on the VE table are always the same regardless what units the VE table is in. its always RPM vs MAP(kPa,psi).

    I would suggest you work in metric(kPa), but that's just what I(and many others) use.

  8. #8
    Joe (Moderator) joecar's Avatar
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    In scantool do this:
    - goto PIDs tab, on MAP pid go rightclick->Metric.
    - goto the MAF map, click the Edit Map Properties button, goto the Cells tab, checkmark Constrain Cell Size, and put a value for maximum width;
    - then (still in the MAF map properties) goto the Data tab and set the Precision to 3 or 4 (decimal palces); click Save, click Ok.
    - goto the VE map, edit its properties, goto the Data tab, set Precision to 3 or 4; click Save, click Ok.

    In tunetool, do this:
    - go Edit->Configure Display Properties, for each of B0101, B0102, B0103 (if you have it) go rightclick->Metric; click Ok.
    - go Edit->Properties and set Volumetric Efficiency to g*K/kPa; click Ok.
    - exit tunetool, restart it.


    DISCARD the copy/paste you did above.

  9. #9
    Joe (Moderator) joecar's Avatar
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    After doing that you will see the VE map values will be close to your exiting VE table values.

  10. #10
    Lifetime Member HellKnightHicks's Avatar
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    Does this look right? Would this imply that there is an Oxygen leak in the exhaust? The Exhaust Is all new.

    Click image for larger version. 

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    Last edited by HellKnightHicks; February 27th, 2017 at 11:29 AM.

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