Focus Fanatics - View Single Post - Eibach pro kit Dead coil cutting on ST 170 (SVTY
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Old 11-28-2012, 05:10 PM   #2
Geezer
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Join Date: Oct 2003
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A dead coil is just that....dead. It does nothing from a spring oscillation point of view. It only impacts ride height by the diameter of the wire used. So if the dead coil is 1/2 in diameter (as an example) cutting a full coil will reduce height by that amount. Using this example, to reduce height 1.5 inches you'd have to cut 3 full dead coils. I don't know if you have that many dead coils, but it's something to keep in mind. The dead coils can also play an important roll of keeping the spring seated especially under rebound conditions (most dead coils are only dead under load, when free (aka free length) there's usually some space between each coil). People have cut springs and literally seen them fall out when the suspension becomes unloaded (e.g. going over a hill) due to a lack of adequate length to hold them in.
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