I admit, my statements on what throttle position to use for the pulse are not scientifically derived. I've looked at every BSFC chart I can find and averaged the points. That's how I get my 1500-2200 rpm range. The charts vary, but the load ranges seem to be 50-90% with many in the tighter 65-80% range. I use that for a baseline.
From there it's seat-of-pants driving with constant adjustments for conditions. I know what works in my car.
I should preface my comments with that, because it may or may not apply to another car.
By the way, I've used up to 2700 rpm (60mph) on the highway and that was my best highway trip. It was with a nice tailwind, though.
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