Explaining Lift Kit Spring Rates
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Leaf-spring rates can be easily determined using one of the following methods. Intercomp Company has a spring-rate test fixture that uses a hydraulic jack to compress the spring and a force scale to determine the rate. The low-buck (albeit less-accurate) alternative is to have a friend stand on the leaf pack and measure the difference in the spring deflection (compressed arch height versus the relaxed height or free arch). The heavier your friend is, the more accurate your results will be. Divide your friend’s weight by the amount of deflection you measured. You can convert your findings to pounds-per-inch. View Related Article
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