I can't seem to find any manufacturer that (officially) prints a timing curve for a model engine. This was the only one that mentioned timing that I could find at: http://tech.flygsw.org/evolution26review.htm, which seems close to your numbers. And this one, perhaps from someone at C&H engines: http://www.rcgroups.com/forums/showthread.php?t=1498669 . Have you found any other example curves?
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