I've read that to convert from MAF to engine load the formula is:
Engine Load (cylinder charge in grams) = (MAF * 120) / (4 * RPM)
However this formula doesn't seem to work out correctly.
For example if the MAF is 300g/s @ 6000RPM, Engine Load calculates to 1.5g. This is clearly not right when the factory ECU goes up go 5.6g in load.
I'm thinking perhaps the factory ECU expresses load in terms of the charge in all four cylinders, rather than a single cylinder, which would mean 300g/s @ 6000RPM calculates to 6g (4 * 1.5). This would be more consistent with the factory load values.
Or do I just have the wrong formula?