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Create Glue Holes: Glue the axles firmly in their holes to ensure that they stay perfectly placed, but make sure you don't get glue on your wheels. 8. Add Weight: Remember to make your Pinewood Derby car as heavy as the rules allow.

All cars must pass the following inspection to qualify for the race: Width shall not exceed 2-3/4 inches. Length shall not exceed 7 inches. Weight shall not exceed 5 ounces. Axles, wheels, and body shall be from the materials provided in the kit. ... Wheel bearings, washers, and bushings are prohibited.

Tungsten is the best weight for your pine derby car because it allows you to pack more weight in a smaller area giving you more flexibility in your car design and more accurate weight placement for speed. Package contains eight 3/8" diameter cylinders with chamfored edges for easy insertion.

Many pinewood car building experts agree that the ideal CG location is about ¾” just forward of the rear axle (assumes a standard pinewood derby car wheel base of 4 3/8”).

Pinewood Racing is for managing and scoring your next Pinewood Derby event.

For optimal Pinewood Derby car performance, most of the weight should be placed one inch in front of the rear axle and as low on the body as possible. This weight positioning helps create maximum inertia to push the car faster once the vertical drop has stopped and the horizontal track is reached.

Dimensions for the finished car are as follows: Width cannot exceed 2-3/4 inches (including wheels and axles). Length cannot exceed 7 inches. Ground clearance must be at least 3/8 inches. Height cannot exceed 3 inches, to clear the timing device.

Place a pencil under and across the car one inch in front of the rear axle. This is where the car should balance. Place the flat weight on the top of the car and move it forward and back until the car balances on the pencil. This is where the flat weight should be placed under the block.

PUT MOST OF THE WEIGHT IN THE BACK Science says the heaviest part of your car should be about 1 inch in front of the rear axle. The idea is that the farther back the weight is, the more potential energy you have because your center of mass is higher up on the track.