So, two turbos running the exact same 15 lbs. of boost...what type of horsepower #'s are we talking between the smaller turbo blowing less dense (hotter) air and a larger turbo running more dense (cooler) air? Is there a great significance, or are we talking just a few hp's here and there? It would seem like a very big factor in replacing turbos if for example the SP500s at 15 lbs. make "x" amount of horsepower, and the larger SP600s at 15 lbs. boost make "x+20" horsepower because of more dense air. Anyone got an idea?