Question on Vtune run and desired AFR

[nc-renegade]

Steve Cole or others knowledgeable on the inside workings of the VTune session.  I decided to do another VTune session(s) because I changed my CLB to 739mV

I set my AFR table to 14.6 in all fields from 775 RPM to 5500 and 20Map through 90 Map.  All others I left as is.  I zeroed out my Warm-up, Acc. and Decl. Enrichment tables and Adaptive Knock control and set my PE to 10,000.

I did a VTune and when I examined the data, I noticed the Desired AFR go from 14.6 at a MAP of 14.4 to to an AFR getting progressively richer to 13.1 starting when the map value hit 80.1.

Here's the table:
Data Filename:VTuneData-005.DM3
Rec Num   / Time Stam / AFR Desired / Engine Temp / MAP / Engine Speed / TPS % / VE Front / VE Rear / Injector BPW Front / Injector BPW Rear / Spark Adv Front /Spark Adv Rear

#   Secs   Ratio   Â°F   kPa   RPM   %   %   %   mS   mS   Deg   Deg
2534   586.445   14.6   248   41.4   3338   1.8   103.5   108.0   2.42   2.58   29.50   34.50
2535   586.674   14.6   248   14.4   2964   6.8   101.0   115.5   9.23   6.41   17.25   23.50
2536   586.905   14.4   248   80.1   2439   23.6   92.5   92.5   13.54   12.41   12.50   14.00
2537   587.124   14.2   248   81.2   2493   23.6   92.5   94.0   12.86   12.83   13.00   10.50
2538   587.363   14.2   248   79.7   2549   24.1   92.0   95.5   12.61   12.78   13.25   10.75
2539   587.583   14.0   248   79.4   2617   24.1   91.5   96.5   12.72   12.47   14.00   9.00
2540   587.806   13.8   248   77.9   2675   24.1   91.5   96.0   12.40   12.98   14.50   7.50
2541   588.039   13.6   248   77.9   2743   24.1   90.0   97.5   12.40   12.92   15.25   8.25
2542   588.265   13.6   248   75.7   2804   24.5   90.0   99.0   12.34   13.25   15.25   8.25
2543   588.492   13.2   248   75.7   2853   24.5   90.5   101.5   12.79   13.93   15.50   8.25
2544   588.704   13.1   248   76.8   2907   24.5   91.0   105.0   12.71   14.38   15.75   9.00
2545   588.927   13.1   248   75.7   2973   24.5   92.0   107.5   12.62   14.75   15.50   8.50
2546   589.147   13.1   248   74.6   3024   25.0   92.5   108.0   12.78   14.56   16.25   9.25
2547   589.375   13.1   248   74.6   3081   24.5   92.5   108.5   12.47   14.18   16.50   9.25
2548   589.607   13.1   248   70.9   3136   25.0   93.0   108.5   12.48   14.11   17.00   9.50
2549   589.835   13.1   248   72.0   3192   24.5   93.5   109.0   12.25   14.06   17.50   9.75
2550   590.065   13.1   248   70.1   3260   24.5   93.5   109.0   12.12   13.54   15.75   10.25
2551   590.288   13.1   248   70.9   3310   24.5   94.0   109.5   12.13   13.53   16.00   10.25
2552   590.539   13.1   248   68.7   3365   24.5   95.0   110.0   11.90   12.98   16.00   10.50
2553   590.771   13.1   248   67.2   3425   24.1   95.5   111.0   11.38   12.65   17.50   12.25
2554   590.991   13.1   248   65.7   3481   23.6   96.0   111.0   11.57   12.48   17.75   11.50
2555   591.228   13.1   248   66.1   3532   23.2   98.5   112.5   11.74   12.50   18.50   12.25
2556   591.458   13.1   248   64.6   3596   23.6   101.0   113.5   11.77   12.25   18.75   12.50
2557   591.688   13.1   248   63.9   3649   23.2   103.5   114.5   11.89   12.08   19.50   12.75
2558   591.908   13.1   248   63.1   3697   23.6   106.0   116.0   12.10   12.16   20.25   13.25
2559   592.129   13.1   248   61.3   3731   23.2   109.0   117.5   12.26   11.62   18.50   13.75
2560   592.369   13.1   250   57.6   3783   22.3   112.0   119.0   11.89   11.68   19.75   15.00
2561   592.606   13.3   248   57.6   3855   22.3   115.5   121.0   11.92   11.32   20.75   18.00
2562   592.833   13.3   248   56.5   3894   20.9   120.5   124.0   11.66   10.86   22.00   19.25
2563   593.064   13.5   248   51.7   3927   18.6   124.0   126.0   10.81   9.90   24.25   22.50
2564   593.284   13.5   248   45.8   3969   15.9   125.5   126.5   9.18   8.21   26.00   27.00
2565   593.505   13.5   248   37.7   3983   12.3   122.5   124.5   7.45   6.47   29.00   30.25
2566   593.735   13.7   248   30.3   3968   8.6   108.0   113.5   5.53   4.88   32.00   35.25
2567   593.965   13.7   250   23.3   3930   4.1   93.0   97.0   3.01   2.59   36.50   40.25
2568   594.204   13.8   248   21.4   3922   4.1   91.0   95.0   2.97   2.71   38.25   43.25
2569   594.432   13.8   248   21.4   3849   4.1   96.0   100.5   3.18   2.90   38.00   42.50
2570   594.662   13.9   250   21.4   3806   4.1   97.5   102.0   3.43   3.11   37.75   43.50
2571   594.882   13.9   248   21.8   3735   4.1   100.0   104.5   3.52   3.19   37.75   43.50
2572   595.113   14.0   248   20.7   3683   3.6   101.0   105.5   3.35   3.01   38.25   44.25
2573   595.339   14.0   248   20.7   3650   3.2   99.5   104.0   3.21   2.91   38.50   44.00
2574   595.579   14.0   248   21.8   3583   3.2   104.0   108.5   3.20   2.90   39.00   44.50
2575   595.799   14.1   250   20.3   3570   3.2   106.0   110.5   3.72   3.23   37.75   44.50
2576   596.023   14.1   248   19.9   3529   3.6   107.0   111.5   3.24   3.05   39.00   44.50
2577   596.249   14.2   248   19.2   3483   3.6   108.5   113.0   3.31   3.06   39.00   44.75
2578   596.487   14.2   248   19.2   3465   3.6   109.0   113.5   3.32   3.06   38.75   44.75
2579   596.708   14.3   248   21.1   3447   4.5   111.5   116.5   4.08   3.51   37.00   45.00
2580   596.939   14.3   250   23.6   3457   5.9   111.5   117.0   4.24   3.96   36.25   45.00
2581   597.160   14.4   248   26.6   3400   6.4   112.5   117.5   4.96   4.27   34.75   45.00
2582   597.398   14.4   248   26.2   3405   6.4   113.5   118.0   4.72   4.18   34.00   45.00
2583   597.626   14.5   250   30.6   3394   7.7   113.5   119.0   5.46   4.84   32.00   44.00
2584   597.849   14.5   250   34.0   3406   8.6   113.0   119.0   6.30   5.50   29.75   40.00
2585   598.078   14.5   248   35.8   3417   9.1   112.5   119.5   6.56   5.94   30.00   40.25
2586   598.319   14.6   250   36.9   3436   10.0   111.5   119.5   6.47   6.24   28.50   37.00


Any idea why the ECM would respond this way?

[Steve Cole]

To much data missing to tell you anything. Send me the DM3  and MT7 files to look at and I can try to see if I can figure out what you've got going on.

[nc-renegade]

Will do.
BTW,  Using a monitor on my handlebars, I just completed another series of VTunes and I must say, the bike is running extremely good!  As good if not better than my T-Max...though it could be my short-term memory loss that's making this statement.


I now plan to make data runs and use MyTune to optimize timing.  Then it's off to a dyno to see how close I am.

[Steve Cole]

My tune does not optimize the timing. 

All it does is remove timing for areas that have knock and it only removes from the main spark table which may or maynot be the right thing to do. This is just the misconception that we were afraid of and why we did not do it.

[nc-renegade]

My tune does not optimize the timing. 

All it does is remove timing for areas that have knock and it only removes from the main spark table which may or maynot be the right thing to do. This is just the misconception that we were afraid of and why we did not do it.

Yep, I have read your thoughts on this before.  I view it as a tool and not an end-to-all-ends.

BTW, I have sent you the files on the question I had.  Just curious why the desired AFR was changing its target when it looks like I was hitting the throttle.  I thought the ECU would not do this with the Acc. Enrichment table zeroed.