Depends how many waypoints you set on a straight road you placed. Its usually better to use more waypoints in the corners than the straights, because the cars will make sure they hit every waypoint, so if you have a lot of waypoints on a straight, the car looks like they drive in a zigzag form. You also might not have a long enough road to see the car each top speed.

ok that makes sense, ill tro to use less waypoint on straights and more in corners, i make the waypoint path the optimal racing path, going on the outusude on straights and taking the inside on turns

get better english dude

but english is my native language

i think he meant your grammar but lets put that to the side, with a bit of salt on top of pepper in it.

I press shift and for some reason it doesn't spawn any waypoints like in one of the videos.

if you're using simfphys, go to vehicle engine modifications then max torque, increase traction accordingly, then the most important mod, increase the efficiency. A 1.50 efficiency is fast enough but it depends on the vehicle