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Originally Posted by TyCreek
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The progressive spring rate helps compression travel and eliminates abrupt bump-stop contact. This is a good for several reasons. However, I can't help think this is a bit of a bandaid to an underlying issue of less than ideal rake and ride hight that proper springs could "fix" vs. making a condition less bad.
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The fact that they report spring rate to be progressive makes it impossible to fully analyze accurately without more information. Over the first 2 inches of travel, the average spring rate is 250 pounds per inch, and when adjusted for suspension geometry, I roughly estimate that spring rate over that first 2 inches increases by an "average" of +/- 50%. And that's a lot firmer ride if that's what you want.
Ford specs show coil springs designed at working height of 12 inches. If you go custom springs, do you know how much you'd want to increase ride height? And do you know how much stiffer (or softer for that matter) you want the front? I'm guessing you want to change both ride height and suspension stiffness.
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