Originally Posted by gee-dub
i just picked up 4-500gram jewelers scales, to my door, for under $60USD. each comes with a 200gram calibration weight. each return to zero when i remove the car, and while the individual weight distribution changes each time i compress/release the suspension, the overall weight stays within 1-1.5 grams.
An easy way to get accurate measurements with four "slightly off" scales:
1. Have the car setup, FULLY aligned and ready to race, but without the body. Its important to have the ride height set equally on all four corners. Use aluminum setup wheels if you have them. If you're using foam tires true them to the same exact diameter. If you're using rubbers, make sure they are not out of round.
2. Setup the four scales on a setup board to where each tire of the car is positioned as close to the center of each scale as possible
3. Remove the car and zero out each scale
4. Place the car on the scales and record measurements for each corner of the car. Using grams, instead of ounces, normally will give you a more exact measurement.
5. Move each scale clockwise (or counter clockwise if you must
) around and under the next tire (i.e. from the front left to the front right, and from the front right to the rear right, and so on...)
Repeat steps 3-5 until you have four distinct measurements from all four scales under each corner of the car. Compute the average weight of each corner from the four measurements.
I use four digital food scales that I picked up from Bed Bath and Beyond.