Re: Dan, great write=up. I'm guessing, but one >>>
Split Second's PSC1 can log data. It can record rpm, MAF voltage and the map value that is used to modify the MAF signal. For $50 at the time you order, you can have the capability to log four auxiliary inputs like O2 signal. It would be a great set-up to record a wide band O2 along with the base PSC1 data. As a minimum, with the auxiliary input feature and even a stock O2 sensor, you would have a very good set-up for tuning. You then could get by without spending the big dollars on dyno time to ensure you don't run lean. It is very difficult to look at the A/F meter and the laptop while your driving to see where you are operating on the fuel map. You are right about recording the AFM signal, as this is what I did with the PSC1 to help figure out a base line map.
I'm glad to hear that I'm not off base about the airflow signal not being ignored.