While searching for turbo calculations I came across a good article written by Aaron Bonk over at Hondatuningmagazine.com. He talks about realistic predictions and expectations for turbo charging. He explains issues such as compressor sizing, surge, trim, and turbines. The calculations are on page 3 of the article. Also to find compressor maps just do an internet search and you will find a ton of them. If all else fails just buy a kit.