I figured I would make a post of this here as this is where it belongs.

http://autospeed.com/cms/article.html?&A=0629

the good part starts in part 3
http://autospeed.com/cms/article.html?&A=0646

in part 5 he has actual test data on how well ram air works. (he dropped his losses by .25 psi)
http://autospeed.com/cms/article.html?&A=0663