[j12piprius]

[QUOTE=Occasionally6;444774]MAP doesn't directly relate to fuel consumption, although in general higher MAP = more fuel consumed. The other main variable is engine speed. If you put those together, high MAP + high engine speed = lots of fuel consumed and vice versa.

I expect the load percentage will be calculated based on the current MAP minus the minimum MAP divided by the range of MAP possible i.e. maximum MAP minus the minimum MAP.[quote]

Thanks much for that detailed explanation. MAP doesn't directly relate to fuel consumption, but the load is derived from the MAP. Here are some comparisons based on your formula (x100). The MAP got down to 24 today when coasting in gear. I'm considering the sweet spot to be 90 to 93 MAP ( 87 to 91 Load). Anything higher is likely to be open loop and excessive.

Load = 100x (current MAP - 24) / (100 - 24) ]

MAP - - - Load
100 - - - - 100
95 - - - - - 93.4
90 - - - - - 86.8
85 - - - - - 80.3
24 - - - - - - 0