I just wanted to say that this IFR curve is a little strange in the low MAP range.

As you said Excel would average everything (also during decel)so I changed the spreadsheet to consider only the scan data related to acceleration and not decel.
Considering acceleration only doesn't change the IFR curve, so I guess this is what my engine wants.
(This curve is the result of a 2 hours scan, using only cells 0-19, cell 15 only when not in PE).
I was just surprised to see lower G/sec at 30 kPa than at 20 kPa.

Stefano