Ok well you know how on some tracks are like 4 laps and 3 laps but you dont want to do that many laps?
well do this and trust me it works its a great way for easier money when beatin the game.
well first go to quick race, custom, choose a circut track(can not be a black list race)and change the laps to whatever(i like 1 but dont mess up tho) and change traffic to none,ok now on the car selection just choose the car(but dont click it just look at it for afew seconds.)the back out of that and go to career and find that track. race it and it should have the amount of laps you choose and no traffic it you put no traffic(ps. you cant change the difficulty or the amount of racers tryd and didnt work) well have fun and good luck!