I found this series of articles on a VW Rabbit rebuilt for better acceleration and fuel economy. Two of the people involved were formerly of the now defunct, tech intensive Sport Compact Car Magazine (not a lot of wings and bling, but plenty of performance). Anyhow, here it is for all to enjoy. Note, it is archived from newest at the top to oldest at the bottom, so start at the bottom and work your way up if you want to read it all.
http://www.topgear.com/us//tags/features/tag/Sipster
http://www.topgear.com/us//tags/features/tag/Sipster