Thanks to Henrik from 24h-le-mans.dk, I added high quality sound recordings for some cars as well as ambience samples of Le Mans:

• http://baszero.ch/racing/2003/06/audio-24h-of-le-mans-2003/
• http://baszero.ch/racing/2009/10/aston-martin-b0960-lmp1-2009/
• http://baszero.ch/racing/2009/10/porsche-997-gt3-rsr-2008/
• http://baszero.ch/racing/2009/10/ferrari-f430-gt/
• http://baszero.ch/racing/2009/10/porsche-rs-spyder/
• http://baszero.ch/racing/2009/10/corvette-c6-r-gt1-2005-2009/
• http://baszero.ch/racing/2009/11/lamborghini-murcielago-r-gt-2003/
• http://baszero.ch/racing/2009/10/audi-r8-2000/

This is just the beginning… more audio will be added soon. So stay tuned!