ROFL... i love it how once someone gets behind a monitor they become experts on all things. This turbulent air you speak of is a phenomon in Formula 1 and other high downforce race cars, i'm guessing your a fan of F1 by your picture, but clearly you don't fully understand it. The way it works is that an F1 car is designed in a wind tunnel, and is designed with air blowing strait at the car (clean air), when one F1 car is closely following behind another the car in front creates a disruption in the air passing over the car (turbulent air or dirty air) and then when this hits the car behind the aerodynamics which have been specifically designed to work with clean air do not work so well as the air is not passing over the car in the same way as it was simulated. This is why overtaking in Formula 1 is so difficult, and it is why they changed the rules this season to reduce aero and instead change to slick tyres to increase mechanical grip while reducing aero grip.
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I think you are correct. I would add the extremely short break distance of F1 cars to the mix.
@Selnor
On a road car race, turbulence is not really an issue.
