I found this over on another forum and I thought it was pretty cool with the suspension calculators and information when you click on a section. http://www.buildafastercar.com/ I know I've shown Nevin these websites before too, but here are some other sites I used to read up on too. Some of it's basic but it's good to keep the information fresh in my mind. http://www.carbibles.com/ (the suspension section was a good read when I first started) http://www.trackpedia.com/wiki/Main_Page (good info about specific tracks)