According to the Scangauge, I'm using 80% or higher throttle. My main target is to keep it just under the point where it adds extra fuel. You can see that on the SG by watching when it goes into Open Loop mode.
From my experience, the 4th, 5th & 6th graphs in the article match best with my engine. Yours may be different. You'll have to experiment and see.
dosco 
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