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I think I have found that my Smart responds to acceleraton at or near minimum BSFC. I found a Mitsubishi publication that was published in conjunction with the release of that engine; it includes a curve of BSFC vs. BMEP at 2000 rpm that seems to show that minimum BSFC at that speed occurs at about 63% of max BMEP.
Now, LOD on the Scangauge is more closely related to IMEP. It doesn't go to zero at zero shaft torque like brake MEP would. I found that at zero torque LOD is about 17 between 2000 and 3000 RPM. So to get a rough target value for LOD under acceleration, I interpolated to find a value that is 63% of the way from 17 to 100 (69).
I try to accelerate at an LOD of around 70-75 whenever possible, shifting at no more than 3000 rpm. I don't have good hard data, but I can tell on the Scangauge that it's better than feather-footing it all the time.
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