As I mentioned before, once you max out the MAF tables for either Frequency or gm/Sec, you loose all metering control for fuel. The PCM will stick to the maximum limit for air flow, even though you may actually be getting way more. In this condition, IDC/IPW will remain static and exhaust AFR's will lean out. My choice would be to go full SD and dump the MAP. It fixes both the frequency and gm/Sec limit.

Simon.