Easy money:
At the options screen select "Simulation". Once you have gained your racing
license and have a decent car, select the "Racing Calendar" option. Select the
"Single Player" option, defeat your opponent, and you will gain $400. You will
then be asked to either "Restart" or "Exit To Menu". Select "Restart", then just
race, win, and repeat as many times as desired to get as much money as needed
Quick start
When fully staged, hold Circle + R, making sure you press Circle first. As
you are holding both buttons, notice that your RPM is rising. Get your reaction
time correct, then release Circle to get a big boost. Note: Do not worry if your
car does a wheelie as it will not affect its speed