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Thread: Wide Band O2 (WBO2 Tuning) Spreadsheet

  1. #31
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Chewy1576 View Post
    Awesome work on the spreadsheet Dave! I have a few questions - What filters are you using for the averageifs on WBO2 and SA history tables? I copied in a set of data from a log I had to try it out and I'm not seeing any data populating in the history tables? The columns in the Insert Datalog sheet match up. Also for this log, I forced Open Loop and PE is disabled.
    Can you post your .xdl file? I filter out ALL open loop data. Maybe in the future I can set up a sheet for Open Loop. I have a sheet for PE only.

    dave w

  2. #32
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    Quote Originally Posted by dave w View Post
    Can you post your .xdl file? I filter out ALL open loop data. Maybe in the future I can set up a sheet for Open Loop. I have a sheet for PE only.

    dave w
    I'm pretty sure it was this one. The Open Loop thing is probably it then.
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    1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 80 lb/hr / 15 psi FP), NV4500, NP241, 3.42

  3. #33
    Super Moderator dave w's Avatar
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    Quote Originally Posted by Chewy1576 View Post
    I'm pretty sure it was this one. The Open Loop thing is probably it then.
    I changed all the values in Column "AJ" to Closed and the spreadsheet worked, see attached screen of near idle table with Column AJ set to closed.

    dave w
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  4. #34
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    Quote Originally Posted by dave w View Post
    I changed all the values in Column "AJ" to Closed and the spreadsheet worked, see attached screen of near idle table with Column AJ set to closed.

    dave w
    That's a good idea. Thanks for the insight Dave.
    1990 Chevrolet K2500, RCLB, Blueprint 383 TBI (16197427 ECM / 80 lb/hr / 15 psi FP), NV4500, NP241, 3.42

  5. #35
    Electronic Ignition! De-stroker's Avatar
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    Quote Originally Posted by dave w View Post
    The use of the Autoprom is not required to get the WBO2 information into the data log. The 0v ~ 5v output from the MTX-L has to be wired directly into the computer, pin B16. See attached screen shot.

    The MTX-L will need to be re-programmed for 0v = 10 AFR / 5v = 20 AFR

    dave w
    Im gonna try this with my lc-2

  6. #36
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    Hi Dave, I'm wondering why are you filtering only closed loop data for WBO2 corrections? It doesn't make sense to me, as BLMs will change WB readout in CL.

  7. #37
    Super Moderator dave w's Avatar
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    Quote Originally Posted by dzidaV8 View Post
    Hi Dave, I'm wondering why are you filtering only closed loop data for WBO2 corrections? It doesn't make sense to me, as BLMs will change WB readout in CL.
    I use WBO2 data from open loop AE and PE when the computer locks the BLM's to 128. CL WBO2 data will validate the corrections to the VE tables for rich or lean BLM's. A VE table causing rich or lean BLM's will also cause rich or lean WBO2 data in CL. BLM corrections have a limited ability to correct for rich or lean conditions. I've tuned several vehicles with AFR's. The WBO2 tuned vehicles run better, have fewer emissions, and achieve better MPG using CL WBO2 data.

    dave w

  8. #38
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    I've always disabled CL when tuning with WB to prevent BLMs messing up the calculations. I've never thought about doing it in CL but I guess it can make sense. By the way, some ECMs still use BLM corrections in PE, but only when BLM>128

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