Saw this site advertised in MM the other day. Checked it out and it has some good info for general mods to your car.

http://www.motoractive.com.au/index.html

I especially liked the article on 'unsprung' weight, and the one about budget brake upgrades. Check it out :D

It may have been posted before, but a search didn't show it up.

that is a pretty good site, clear, summerized,