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Probably good to describe the boundary conditions and constraints when trying to max FE over hills: min/max speed at start base/ crest / and end base.
Seems to me that if the mins are say 50mph/50/70 versus 50/10/30 versus 50/30/50 then you may have different strategies to climb the hill. The 50/10/30 case may yield the best FE but of course only averages ~30 mph...
I tend to let my speed drop up to the amount that it will gain on the downslope. To me a straightforward way to determine proper throttle going up would be to run (repeated) trials at various rpms/shift points/throttle position (Xs) and see impact on whats important: ave speed, FE (Ys).
My 2 cent.
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