Tip 2 - Build a full-sized test track  It's not too hard to build your own backyard test track, with at least two lanes.  It's the only way to find out how fast your car will go before the Big Race.  Race it against your friend's cars, under supervision.

Tip 3 - Build two cars.  If you are really serious about winning, build two (or more) cars. Race them against each other (or against an electronic timer). Select the fastest wheels, axles and bodies.  However, do not use prior years' parts.

Tip 4 - Protect your best wheels.  When you have found your fastest wheels, spin the wheels regularly with graphite and up them aside until the Big Race. 

Tip 5 - Center the car on the track.  If you are allowed to place your own car on the track during the Big Race, be sure to place it right in the center of the track.  It should be headed straight down the track!

Tip 6 - Check your car weight.  Make sure that the weight of your car is close to the maximum the rules allow - 5 ounces.  If possible, check the weight on the official scales several days before the race. A lot of builders try to add some amount of removable weight to your car.  Some use small flat-headed wood screws in the bottom or rear of the body to add or subtract weight. Be creative within the boundaries of the rules.  Remember not to add the weights to the back or from of the car body that extend it over the length, width and clearance limits.  The car block is typically already at the regulation length.

GOOD LUCK AND GOOD RACING!