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Thread: Calc.VET: correcting MAF and calculating VE (in single log)

  1. #121
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    I/We have started a Draft Copy of the CALC.VET Tuning Tutorial:http://forum.efilive.com/showthread....l=1#post135867

    Writing a Tutorial is a major project and the Draft Copy is primarily intended to aid Joecar and myself in the Editing process. It will be eventually merged with the existing CALC.VE Tutorial. We hope to accomplish this by September 1, 2011.

    The Tutorial will be subject to numerous edits. It is offered now only as a convenience to our forum readers and participants. Many of the copy and paste functions have been taken directly from the existing CALC.VE Tutorial.

    User input is always appreciated. Please keep it professional and topic-related. We welcome as much participation as possible. Thank you for your patience and understanding..

    ..WeathermanShawn..
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  2. #122
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    Quote Originally Posted by joecar View Post
    Frozen,

    Are you using analog wideband connection...?

    If so, is if your wideband is a stock-programmed LC-1...?

    If so, then in Shawn's calc_pids.txt file you need to replace {EXT.WO2LAM1} with {CALC.AFR_LC11}/14.7

    Code:
    *CLC-00-110
    factor    0.5    1.5   .4  "{GM.EQIVRATIO} * {EXT.WO2LAM1}"
    Sorry for not seeing this sooner. I'm using a Dyno jet Wideband 2 with a gauge in my dash (it is factory programed). I hooked it into the efi live black box with the 3 wire plug. This wideband says inputs: are analog 0-5v. Outputs: gauge driver 0-5v analog, calibrated afr 0-5v analog.

    I'm not sure if that changes anything in that code you've written.
    Last edited by Frozen WS6; March 14th, 2011 at 04:34 AM.

  3. #123
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Shouldn't, but we will keep our eyes open. Serial connection is so much easier and no Analog offsets necessary..(need V2) but as long as you can define Lambda it should work...
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  4. #124
    Joe (Moderator) joecar's Avatar
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    If so, then in Shawn's calc_pids.txt file you need to replace {EXT.WO2LAM1} with {CALC.AFR_LC11}/14.7


    Replace
    {CALC.AFR_LC11} with the pid for your DynoJet wideband AFR, and replace 14.7 with whatever the DynoJet assumes to be stoich (most likely 14.7).

  5. #125
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    Does this look correct. I changed it to this.

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO} * {EXT.W02DJ1}/14.7"
    2007 TBSS-All stock
    2001 WS6 TA-Stockish, custom paint, LS7 clutch, spray, 6 point rollbar.
    1998 TA- Not much stock, 408, t350, spray, cage, fastest LSX in Alaska, 9.755@136 (so far)drag radial street car, driven, never trailered.


  6. #126
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Frozen WS6 View Post
    Does this look correct. I changed it to this.

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO} *
    {EXT.W02DJ1}/14.7"
    Should read like this:

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO} *
    {CALC.AFR_DJ1}/14.7"

  7. #127
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    joecar, as a coder, I believe you should know how having 'magic numbers' in your code is Bad Mojo (TM). Do not use 14.7 unless you can guarantee me that my fuel has a 14.7 stoich. Last weekend I got to play with a car where I spent hours figuring out why my calculations where wrong, and it turned out that the fuel had almost 20% Ethanol in it, throwing off all kinds of calculations.

  8. #128
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by redhardsupra View Post
    joecar, as a coder, I believe you should know how having 'magic numbers' in your code is Bad Mojo (TM). Do not use 14.7 unless you can guarantee me that my fuel has a 14.7 stoich. Last weekend I got to play with a car where I spent hours figuring out why my calculations where wrong, and it turned out that the fuel had almost 20% Ethanol in it, throwing off all kinds of calculations.
    Marcin,

    Good point, you are correct;

    I'm assuming that the wideband controller assumes 14.7 as the multiplier.

    In the case of the Innovate controllers, the stoich AFR is programmable, and instead of 14.7, the programmed value should be used.

    In the case of other widebands, the user manual would state what the assumed stoich AFR is, and that should be used instead of 14.7.

    This is why I had carefully worded the second part of this response:
    Quote Originally Posted by joecar View Post
    Replace {CALC.AFR_LC11} with the pid for your DynoJet wideband AFR, and replace 14.7 with whatever the DynoJet assumes to be stoich (most likely 14.7).

  9. #129
    R.I.P Shawn, 1956-2011 WeathermanShawn's Avatar
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    Marcin raises an important issue. Make sure B3601 is correct for your type of Fuel. There are inexpensive kits that you can buy that will test for the amount of Ethanol in your 'fuel'. Thats the value that needs to be entered in B3601.

    As a side note, keeping your Fueling Parameters in EQ (Tune Tool) prevents a lot of confusion in Fueling Calculations, especially when entering PE Mode/WOT.

    I'll try to add an note in the ongoing Tutorials..its a major issue and has been throughly discussed in numerous threads. Joecar's statement is absolutely correct. Addressing the differing Wideband Controller's multiplier makes it challenging.

    The bottom line is B3601 needs to be correct.
    2002 Black Camaro Z-28 M6 Hardtop 11.0:1CR 425HP/410TQ SAE (400TQ@3500RPM)
    200cc Heads, 228/232 110+2 Cam, 1 3/4" LT's w/catts, GMMG, Koni Shocks, Hotchkis Springs, 35/21 Sways, 17" ZR1's, 3.90 Gears Roadrunner PCM LM-2 Serial Wideband
    EFILive Closed-Loop MAF/SD Hybrid Tune..


  10. #130
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    Quote Originally Posted by joecar View Post
    Should read like this:

    *CLC-00-110
    factor 0.5 1.5 .4 "{GM.EQIVRATIO} *
    {CALC.AFR_DJ1}/14.7"
    Ok corrected it to that. I have to put the car out side in the 25 degree cold today. So I'll use that time out side to run a scan. I'm not sure if or what the ethanol ratings are up here. I think there is a sticker on the gas pumps that says because we have alot of small planes and they can't run it in them. I'll try to remember to look.
    2007 TBSS-All stock
    2001 WS6 TA-Stockish, custom paint, LS7 clutch, spray, 6 point rollbar.
    1998 TA- Not much stock, 408, t350, spray, cage, fastest LSX in Alaska, 9.755@136 (so far)drag radial street car, driven, never trailered.


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