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Yes, no doubt a long process! I might be pulling my timing back a little bit anyway since the the last bit I added didn't really show any noticeable gains. As you said I can always revisit that part for fine adjustments.
I was curious about decreasing the intake advance where I have the lean hump in my AFR curve, so I flashed the yellow tune from above.
Completely unscientifically without any same day comparative runs, I suppose I can imagine why it won't work (optimally) with looking at load or MAF.
When comparing with older log, I can see load and MAF going down, while VE remains about the same. If it's a fake lean and air is rushing straight through the cylinder, it would make sense it's reading a higher MAF/load without a difference in VE? If that theory is correct, I suppose it would only apply to when there is too much overlap?
Anyway, I'll stick with VE and use the Vgi tool for further tests. It will probably be a while (looking for better weather and I have too much other stuff to do at the moment) but I'll update here on my progress when I get that far.
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