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Last Post 21 Jul 2014 01:29 PM by  CadVetteStang
To square or not to square? cut coil spring lowering calculation
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CadVetteStang
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Posts:25


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03 Jul 2014 01:33 AM

    I just did a spring swap in the rear short arm long arm suspension and the ride height is three inches too high. I need to do a second cut on these springs to dial in the desired ride height.

     

     My lower A-arm is 14.25" long (bolt hole center to bolt hole center). My spring center is 7" out from the inboard A-arm mounting point, so my spring motion ratio is ".2413"    Is this what I go by to calculate the drop? If so, then 3 X. 2413 = .73 so I cut about 3/4 inch of spring to drop it 3 inches.

     
    If I don't square it, then I need to cut about 1.5 inches of spring to get my target drop amount.
    So.... To square or not to square.... That is the question...

    CadVetteStang
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    Posts:25


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    21 Jul 2014 01:29 PM
    FYI: When I cut 3/4" off of the springs, it dropped the car right at 1.5"
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