In this game, there's a glitch where you collide with the border of a track during a turn, your speed doesn't get lower, in fact, it seems to get higher, you can get even higher speed (breaking the maximum top speed of the car) by holding the opposite direction of the turn. What I mean, you take a left turn, instead of breaking/releasing the accel. button to take it, you ram directly into the fence/wall were the turn is and you start holding the stick to the opposite direction (or tap it in case the turn isn't that big), you can know this by looking how the camera will start shaking a lot. You can practice this on Coastline, since is the easiest to get this glitch working. The results are quite hilarious, for example, Type PS Car regular speed can't go more than 265KMH, but with the glitch, it can get as ridiculous as 311KMH, be careful anyways, you can go crazy with the car if you're too fast. And don't worry if the car gets too damaged, it doesn't affect its performance (and it's funny to see how messed up it can get at the end).