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Frosty's argument makes the most sense yet about how the lower DCR engine can win out. I do agree that as an engine's RPM goes up efficiency, cyl pressure all go up, to a point. Then fall off. You know, the old bell shaped curve again? You can see it on any dyno graph. Are there any simulation programs that take DCR into consideration? I guess if they all take all of the valve events for the cam into consideration, they do. That might be a half assed way to tell. And I'm sure there are advantages to both kinds of builds.

So then how bout I throw this question into the mix? If DCR makes no difference in power output, why does most everyone strive for the highest number given the fuel they intend to run? I certainly don't think it's for bragging rights.