Originally posted by milefile
It has to do with the centrifugal force. Not wind.
braking has nothing to do with centerfugial force...
It has to do with the brakes slowing the wheels which makes the car slow down, the car slows down and forces your body to slow down, which forces your head to slow down, which forces your eyes to slow down, which forces the water in your eyes to slow down... Get it? nothing about a circle and outward momentum.
With a helmet, there will be air in front of your eyes, air that is not going anywhere, air that is not creating a vacuum that would suck the water out of your eyes(without a helmet, your face would press the air forward in front of your face, when you stopped, that air would not, and it would create a vacuum). If there is enough force to bring water out of your eyes it isnt signifiant, especialy scince when you accelerate you will get that water right back.
That is of course, only speculation, as all of that other drivel was.
And yes, driving an oval course is tough. To get a simple glimpse of this, take a car in GT3 that is tops out at exactly the same speed as an AI car (good to do it in a specific make race). Now try and beat them, you wont unless you keep in the pack. It works nearly the same way for NASCAR. You must keep cars near you to go fast, you must leapfrog off cars to pass, to say it is easy is stupid, remember that other drivers are out there too, trying to go fast too, and trying to keep you from going fast.