The wall strategy will only work at bristol, any other track your time will definitely be slowed. The basic understanding of the wall strategy at bristol for the 3 main series (cup, xfinity, truck) is to full throttle into turns 1 and 3, and then bounce the car/truck off of the middle of the turn to keep your top speed but also have enough turn to drive through the back/frontstrech for a faster lap time than driving around the racetrack normally. It's a very risky strategy to do especially with the trucks but it does pay off for a faster lap time. My Yt EnforcedDust Gaming, my cup series bristol shows the wall strategy, but yet again its hard to pull off perfectly, to early the car/truck will ride against the wall slowing you down, and to late the car/truck will bounce off the wall too hard slowing you down.