Originally Posted by
SiriusC1024
What do you mean? Gen 1-3 Mustangs can go into OP.
Fuel pump maybe. Find it hard to believe Shelby didn't rate the pump for their $80k custom job. Thing is when more fuel is commanded more fuel is delivered, as a comparison of the two logs shows. 0.75 lambda solid from 3300 rpm to shift at 6150 rpm really makes me doubt it's a fuel delivery issue.
The knock may or may not have been false. The gradual drop is because of the recovery rate Spark>Retard>Rate Fast (3 degrees in 10 seconds). Spark is pretty hot. Best to err on the side of caution, especially with a supercharger, especially at the top of the RPM/Load range.
It's strange that WOT lambda is maintained at what the table says, but commanded keeps getting lower. The O2 sensors are doing a good job correcting, but how do they know to correct to anything other than commanded? That makes me suspect a problem with calculations based on the airflow models. For example, ETC Throttle Angle Error trends with the difference between Actual and Commanded lambda. This happens at any point of the log.
Things like OP, Speed Density, Throttle Body Model would do this.