I can't believe how intuitive you are.

I don't have a clue on this one.

Here are a couple odd Timing facts I've learned with my car (2001 Z06)

I do know that, on my car, between 2000 and 3000 RPM if the Dynair exceeds the MAF values then it drops off the MAF (onto the VE table) and the timing drops to the lowest available value. Lowest value was usually the "Base Spark Park" value. I could prop it by boosting the Base Spark value. A Tip of the Hat to Ross on this!

Also if Commanded AFR exceeds 13.8 - 14.0 in lower RPM ranges, steady throttle, the PCM will pull timing and surging results. This can be circumvented by adjusting " Fuel Mixture Spark Correction" at the apprpriate EQ Ratios. Negative numbers work to drop timing values. Tip my Hat to Ross, again!!

All of this is open loop info though.

Have a great weekend!!

Cheers,
joel