Rennlist - An extremely useful resource for the Porsche owner. A great bunch of people too.
Porsche - The official company site
Porsche Club of America - A great club for a great car.
Rennsport Region PCA - My local region
Physics of Racing Series - A very interesting read
Rennsport Systems - technical papers .
Pelican Parts - 911 specific technical articles
Michael Sherman's - technical articles page
911 Evolution - History and specs on the 3.2 911
Project Eat Porsche - This is what a friend of mine started after I gave him a ride in my 911 at a local autocross. This project was kept secret from me for almost a year until I happened to find the web site.