MAF tuning via LTFT/STFT?

[turbo lcc]

I was looking at the new maps included in 7.4 and found "{B5001} MAF Calibration Table - LTFT Bank 1%"

I did a search and didn't find alot of info on tuning this way. Can STFT be used for tuning the MAF too? Is this method a bad idea??

[SSpdDmon]

It's not a bad idea given two conditions...

The car is in closed loop operation while logging. Any data from open loop will skew results.

The O2 sensors should be in good working order. Garbage_in=garbage_out.

Most of the other tuning requirements apply (no DFCO, filter out transitions & unsteady throttle, etc.)