Results will vary greatly with a warm engine. Especially with forged pistons. your results are pretty good even with a cold engine and would suspect that they would be higher when warm.
As far as I am concerned I enjoy working on my own car when time allows. The difference is that I don't work on cars all day. So yes I would supercharge. But I am kind of strange....I would get more pleasure out of bolting the thing on than driving it.
