Timing dips, cause?

[Fmstrat]

OK: EVOIII 16G, FMIC, 3" exhaust, and all supporting mods. Stock fuel system, running around 12psi.

I'm getting dips in timing, and running REAL rich, though I'm not sure why. I'm guessing a result of knock in some way, but I'm not sure what could be causing the knock.

Here was my first run, their both just long 2nd gear pulls. Notice the -1 timing:

Time RPM Timing O2
0.3 1800.0 27.0 0.04
0.58 1768.0 26.0 0.68
0.87 1776.0 26.0 0.82
1.15 1896.0 27.0 0.18
1.46 1956.0 13.0 0.92
1.74 2056.0 11.0 0.94
2.03 2160.0 10.0 0.94
2.31 2272.0 9.0 0.94
2.6 2396.0 10.0 0.94
2.88 2544.0 10.0 0.94
3.17 2676.0 9.0 0.94
3.47 2836.0 9.0 0.94
3.75 2988.0 9.0 0.96
4.04 3168.0 7.0 0.96
4.32 3360.0 5.0 0.96
4.62 3552.0 5.0 0.96
4.91 3784.0 -1.0 0.96
5.19 4012.0 7.0 0.96
5.48 4192.0 9.0 0.98
5.76 4436.0 9.0 0.98
6.05 4660.0 9.0 0.98
6.34 4864.0 9.0 0.98
6.63 5092.0 9.0 0.98
6.92 5308.0 9.0 0.98
7.21 5548.0 10.0 0.98
7.5 5780.0 11.0 0.96
7.77 6000.0 13.0 0.98
8.07 6192.0 15.0 0.96
8.37 6408.0 16.0 0.96
8.65 6620.0 16.0 0.96
8.94 6796.0 16.0 0.96
9.22 6324.0 16.0 0.96



Here is another, during this run, coolant temps were 214, and airtemp was around 120:

Time RPM Timing Airflow TPS O2
0.66 3016.0 27.0 5.71 65.23 0.94
1.31 3248.0 9.0 11.08 98.23 0.98
2.0 3612.0 4.0 14.82 98.62 0.98
2.66 4064.0 9.0 16.59 98.62 0.98
3.32 4500.0 8.0 19.61 98.23 0.98
4.01 4972.0 9.0 22.58 98.62 0.98
4.67 5468.0 11.0 24.76 98.62 0.98
5.34 5944.0 14.0 26.23 98.23 0.96
6.27 6432.0 35.0 4.43 1.18 0.66


Also, the last time I was at a dyno (still on the T25) I was running super rich on the wideband, too.



Any ideas?

Thanks,
Ben

 

[Fmstrat]

In reading, I found one theory, how plausible is this:

injectors are at 100% duty cycle, so it knocked, timing was pulled, thus gas was burning all the way, and was still burning on the way out and into the exhaust, making the EGT's high and the O2 seem rich

I do have somewhat high EGTs, though I have them at cruise too, so I assumed it was just the probe being too close.