If you want extra money with out cheating follow these steps: (1). Create a Event (DRAG RACE) (2). Make sure the track it is a straight long line for the (drag race) (3) Choose the car bhp's to max which is 1200 BHP (4) When the betting thingy comes up make sure the cars Dodge viper vs corvette z06 (5) Bet all you're money to the Dodge viper as it's way Faster then the Corvette (6) And at the end You will win extra money after the race ends (7) And remeber make sure you watch the Dodge viper Beat the corvette zo6.
To get better sprint starts hold the brakes (left trigger) and accelerator (right trigger) until the word go disappears, then let go of the brakes and play as normal. I'm not sure if this works in other races.this is not a guarentee you will win but it can stop the wheels spinning at the start this is not bogus because I use it all the time