I sometimes noticed the change while doing the drifts like the first one, but I'm still unsure. Now you have finally proven that it works, very nais. The second one tho, I'm actually surprised it also works if you do it in the right place.
Physics of reality of course if we drive in corners or rails we lose speed speed compare to driving in middle line , FOR EXAMPLE driving in mountain curves ,move along the curves to avoid speed loss and gain much speed