The ultimate aim of car construction is to make the  
car as powerful and reliable as possible. Any 
component failure can lose you a race. Keep an eye 
on weight - don't fit a 100% capacity fuel tank if you're 
planning plenty of pit stops. And always try to set gear 
ratios as tight as possible, especially for slower circuits. 
Finally, if the next race involves a lot of hard braking, 
make sure you bias the brakes to the front of the car.