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Thread: CalcVET Question

  1. #1
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    Default CalcVET Question

    I tried the CalcVET and when I copied over to the Main VE table the data doesn't look right to me. Could someone help me with what I did wrong. Thank you.

    Here is a copy of my log and tune file:
    Attached Files Attached Files
    2006 GMC CCSB 1500HD 4X4 - Radix 3.2 pulley, Pacesetter Long Tubes, Magnaflow exhaust

  2. #2
    Joe (Moderator) joecar's Avatar
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    This is what I get from your files:

    Click image for larger version. 

Name:	VET map.png 
Views:	264 
Size:	117.2 KB 
ID:	12376 Click image for larger version. 

Name:	B0101 VE pasted from VET map.png 
Views:	322 
Size:	219.7 KB 
ID:	12377


    (remember the VET map is pasted-with-labels straight into the VE table)
    Last edited by joecar; December 9th, 2011 at 10:07 AM.

  3. #3
    Joe (Moderator) joecar's Avatar
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    Post pics of your map and the VE table after you past-with-labels.

  4. #4
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    Here is what I come up with
    Click image for larger version. 

Name:	Map.png 
Views:	252 
Size:	165.7 KB 
ID:	12378 Click image for larger version. 

Name:	Map.png 
Views:	252 
Size:	165.7 KB 
ID:	12378

    This is without smoothing the VE table but my concern was with numbers going from the 40s, 50s, etc. down to 1-2.
    2006 GMC CCSB 1500HD 4X4 - Radix 3.2 pulley, Pacesetter Long Tubes, Magnaflow exhaust

  5. #5
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    Sorry, here is the VE table
    Click image for larger version. 

Name:	B0101.png 
Views:	281 
Size:	284.1 KB 
ID:	12379
    2006 GMC CCSB 1500HD 4X4 - Radix 3.2 pulley, Pacesetter Long Tubes, Magnaflow exhaust

  6. #6
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    Here is the VE table after smoothing:
    Click image for larger version. 

Name:	Smoothed B0101.png 
Views:	243 
Size:	311.5 KB 
ID:	12380

    My numbers are different than yours so I'm not sure what I'm doing different.
    2006 GMC CCSB 1500HD 4X4 - Radix 3.2 pulley, Pacesetter Long Tubes, Magnaflow exhaust

  7. #7
    Joe (Moderator) joecar's Avatar
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    Ok, this is the problem: your tunetool is displaying B0101 VE table in units [%], whereas your scantool map is displaying in units [g*K/kPa].

    So you have to be sure to use the same units in tunetool and scantool;

    you can do this by doing one (and only one) of these:
    - in the tunetool, go Edit->Properties and set the VE units to g*K/kPa,
    - in the scantool, for the map data use CALC.VET.% (i.e. the one with % units);


    when the units match, your scantool map data would be much closer to the VE table cell values.

  8. #8
    Joe (Moderator) joecar's Avatar
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    BTW: remember to:
    - eliminate map cells that have low count (empty).
    - apply the transient filter.

  9. #9
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    Under edit map properties > empty (tab) I checked hide empty cells and set the low count to 10. Is there something else I should change?
    2006 GMC CCSB 1500HD 4X4 - Radix 3.2 pulley, Pacesetter Long Tubes, Magnaflow exhaust

  10. #10
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by BlackSS View Post
    Under edit map properties > empty (tab) I checked hide empty cells and set the low count to 10. Is there something else I should change?
    10 or 20 is fine.

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