I want to model a sports car, where do I get the 2D reference drawings from?

Hi Steve you could try here - you will just need to search the sites until you find the car you want to model....
What car are you thinking about?

http://www.mediafire.com/?ywzijzdwg5z

http://www.smcars.net/forums/blueprints/

http://www.the-blueprints.com/

Just go to your favorite search engine, usually there is an "image" filter on them, then search your car (eg 350Z) and add words like "blue print" to it. Also you will probably use the larges images you can find for better resolution.

After I find one I like to open it in paint or the like to save in out to 3 or 4 copies and then crop each to get separate top, front, side, back etc views.