Originally Posted by
hjtrbo
GMVE = IFR x IPW x AFR_wideband * MAT / MAP
.
GMVE, IFR, MAT and MAP will be the same whether E0 or E85 and AFR_wideband is what it is. GMVE will not modified by ethanol content.
IPW is a function of IFR and GMVE that only leaves IFR or GMVE as the adjustable variables. So one or both of those are wrong in your tune (and / or incorrect fuel pressure reported).
Here is an example from one of my logs that lines up very nicely
GMVE from log = 2575mg*K/MPa
GMVE from tune = 2575.5mg*K/MPa
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IFR = 14.578g/s
IPW = 13.94ms
AFR_Wideband = 7.5:1
MAT = 31?C = 304.15?K
MAP = 180kPa = 0.18MPa
-------------------------------------------------------
Fuel = 14.578g/s * 0.01394s = 0.20321732g
Air Fuel = 0.20321732g * 7.5 = 1.5241299g
1.5241299 * 304.15 / 0.18 = 2,575mg*K/MPa