[vs346]

Originally Posted by knighty

I dont know the actual altitude distance, but the le-mans circuit is quite high up from sea level, so the air is thinner, and this really affects the power of normally aspirated engines - not so much turbos - I dont know the technical reasons why though - someone please educate me

The highest point in Le Mans is only 134 meters above sea level. I'm not sure that's high enough to affect an atmo engine.

http://en.wikipedia.org/wiki/Le_Mans