First off, I want your numbers!!

Why does the hp fall off a little once past about 5800 rpm? I see alot of dynos that do that. Is that optimum power band. I guess if the turbo is still building power past redline you would not be running efficiently.
Sorry for the rambling train of thought, but I see dynos of the 2871r that also have the same curve and I just want to know if that dip at the end of the powerband is desirable or if I should get a bigger turbo.