While going around sharp corners at high speeds, you will often go off of the track and lose speed and risk of losing your place in the race. To prevent this, just let off the gas completely at the middle of the corner until you start to skid. Do not panic. When you start to skid, accelerate again and you should regain control. Straighten yourself out and you can get to your top speed faster than if maintained the same speed throughout the entire turn.
Get the Mustang (for $31,000) from Class 1, upgrade the wheels to level 4, then go into race mode. Keep on doing that and upgrade all items to level 4. Sell it, get a new car, and Class 3 should now be unlocked.
-In Class 4, the greatest car is the Nissan R390 Gt-1.
-Contrary to popular belief, the Toyota GT-One is not the fastest. The fastest car is actually the TVR Speed 12. However, it also has the worst steering and is the most difficult to drive. Try the TVR Speed 12; it performs very well, especially with upgrades.
Choose "Play" at the auto load menu. When the Test Drive 6 properties window opens, click on the "Testing" tab, then go down and check the "Time Demo" box. Start the game and choose to do a single race, tournament race, or challenge. When you selectthe race, the CPU will automatically start and show intermission with all Fords then when a race is done. Ignore the blue screen that appears with your computer's information. It will then say that you won the race. Note: You will not always finish first, but this is an easy way to get money.