I found some interesting turbo pages/sites on the web and wanted to share them. I am also interested in other people's links, so I started this thread. Please share your links!

Here's an interesting article on choosing a turbo, including details about calculating air flow and reading compressor maps:
http://www.gnttype.org/techarea/turbo/turboflow.html

TurboCalculator is a cool little app ($20 for personal use at the time of this post) that will do the math for you and plot some points on compressor maps from the database of maps that are included with the application. This site also has some maps that you can view online for free, as well as some practical turbo-related tech articles:
http://www.turbocalculator.com/index.html

Link to Garrett catalog. Contains maps for GT turbos:
http://www.jhdiesel.com/GarrettCAT.pdf

-Max