d 15 supercharged

So I was wondering does any of you guys know, what is the HP of a supercharged d15 or turbo even , I'm trying to figure out how is the over all HP of a car determined, like my engine for example is rated at 102 but what about when I add diff exhaust and intake turbo etc, I want to kick ASS with something that others don't have but if I can't achieve the hp I want then I'll move on and find a diff engine, but how nice would it be to kick some ass with a small engine