@rakeshishere, you got to use the SPEED BREAKER to avoid accidents (avoid getting Tottaled).
But dont use it for longer period of time, coz it slows the car too.
When you have Drag Races with a BlackList Racer, try to get infront of him & guide him towards a Traffic Car, make sure you escape by using SpeedBreaker if u r too near the Traffic car.
Use the Nitrous when the car is just about to UPSHIFT. & when you want your car to go straight line.
If you wanna do this the lazy way, use that Poizn Trainer, it has a cheat for "No Engine BlowUp".