Drop weight from your car. Go to the upgrade area and under “Chassis”, you’ll be able to drop weight up to three times. This can take up to 25% of the weight off the car, which allows you to go WAY faster, without worrying about extra engine damage.
Go to the store area, and you can watch videos, and earn free coins for every video that you watch. Watch them until you have enough money for some good upgrades.
Alex - You will be introduced to Alex your racing team manager when you have loaded the game for the first time. Listen to what Alex says as her advice is useful when you are struggling in the game.
Car - When selecting a car you need to take several factors into consideration, these are weight, power, and shift speed. To start with it is better to select a car that is balanced in all three areas.
Upgrades - Upgrading the intake, engine, exhaust, drivetrain, conversion, chassis, aero, wheels, paint job, and grip will improve the performance of your car. Some of the upgrades can be pricey so it is often best to hold off on fully upgrading your car until you can afford to.
Boosts - You can tap on the 'Boost' button to allow the mechanic to 'Tune Up' your car for a certain number of races. You can increase your cars max speed if you tune up it up which will make winning races easier. To Boost your car will cost you Diamonds so spend them wisely.
Nitrous Oxide, or NOS, becomes absolutely necessary to win races in the later rounds.