I bought a large gear driven supercharger, fuel system and intake in preparation for a slight horsepower increase in my Chevelle. The parts that I bought were on a 98 octane street engine that made 1530 horsepower on this dyno.
Steve Morris makes some pretty impressive engine combinations and posts the results on his website. Here's the outcome from a twin supercharged motor that was set to make 2000+hp...
Ouch!