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It would seem to me that if you were equal distance between 2 long unbroken walls, that aero wise it would point the just moved air into a more controlled rear vortex if you will.
A heavily traffic-ed tunnel would provide a consistent headwind, and wouldn't that be preferable to random side winds?
I could see only one wall as being "dirty". Yet beyond the racing line shorter distance issue, picture a last lap hard run by #2 trying to catch #1 and pass him.
Most of these scenes are happening at 185-214 mph. with one wall that they almost touch. Granted we don't go at those speeds, but if it makes the air that dirty, wouldn't they pick a line further from the wall?
I see this can of worms growing as most tracks also have different rates of banking up to their walls. Would a high rate of banking erase dirty side pressure?
Remember, many times these guys are 1-2"'s away from these walls lap after lap!
Also at higher speeds, drag racers, and Bonneville racers often put front to back stabilization runners (like giant old fashioned car rain gutters) Wouldn't equal spaced walls facilitate aft flow IF you were the 1st car in dead air?
This is quite the interesting conversation! Also currently, because of their usual mostly left turns, many of you have noticed a stabilization bar as described above positioned on the left rear , just aft of the rear window!
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