Originally Posted by subterFUSE' post='370359' date='Dec 22 2006, 04:48 PM

When I got the driver training session at the BMW performance center, they told me to adjust the seat so that your legs are as straight as possible. The reason for this is because a bent knee often leads to an angled right foot on the accelerator pedal. (ie you leave your heel planted on the floor and only use your ankle to switch between gas and brake) He said that a straight leg promotes a straight foot on the pedals which is the preferred position. He showed me one reason to have a straight foot is so that you can actually press the brake and accelerator pedals at the same time (important for matching revs on a manual). In a demonstration, he had the left half of his foot on the brake, and then rolled his foot to the right, and it depressed the accelerator at the same time.
I find that straight legs feel better to me on long trips. If I have a bent knee for a long time, I get stiff.