Have you heard about RaceCarBook.com?

Our partner website is a great of resource for racers and engine tuners.
RaceCarBook.com was created to sell books related to mechanical fuel injection engine tuning by Bob Szabo, a retired welding engineer and long-time drag racer. Through that site, AirDensityOnline.com was created.
In addition to books, the site also has numerous free articles from years of development and research. Check out their free articles and newsletter archive for a wealth of information.
They also have a semi-annual newsletter where you can sign up and receive further information. Check them out!