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<blockquote data-quote="TacomaJD" data-source="post: 417071" data-attributes="member: 1780"><p>You measure shaft showing by bottom of the shock body, the length of the shaft, to the stop on the end of the shaft just before the eyelet. I'm guessing that's what you are calling the spring cup, (spring seat). The rule of thumb of having your lower spring 2" longer than shock travel is correct, but that's not all that's gonna fix your problem. You will have to change spring rates, while doing so, ensure that you go with a 2" longer lower spring (16" in your case if they are 14's) and top spring equal to shock travel = 14". So 16 lower and 14 upper. But then you'll have to play with your spring rates to get it right. </p><p></p><p>This will be difficult to do without knowing what your current spring rates are to kinda set a base line to start from, and without knowing your corner weights. You might be better off calling Jimmy Penner at EOR, send him some pics of your Jeep and tell him all the specs so he can guestimate weight, and buy new springs from him. Springs are not too awful expensive, then if you could figure out what # rating your current springs are, you could turn around and sell them on here pretty easily.</p><p></p><p>Jimmy is who set mine up for me. I sent him several detailed pics of my rig and specs that are big weight factors, he sent my coilovers with 100/200 springs, was damn close, but ride height was too low, so I swapped the top 100# spring for 150# springs and it's perfect for me now. Mine are 14" Fox coilovers with a 16" lower spring and 14" upper.</p><p></p><p>Jimmy is the suspension master, but they stay busy so it might take a bit to get ahold of him and for him to give you an answer, but it will be well worth the wait in your situation.</p></blockquote><p></p>
[QUOTE="TacomaJD, post: 417071, member: 1780"] You measure shaft showing by bottom of the shock body, the length of the shaft, to the stop on the end of the shaft just before the eyelet. I'm guessing that's what you are calling the spring cup, (spring seat). The rule of thumb of having your lower spring 2" longer than shock travel is correct, but that's not all that's gonna fix your problem. You will have to change spring rates, while doing so, ensure that you go with a 2" longer lower spring (16" in your case if they are 14's) and top spring equal to shock travel = 14". So 16 lower and 14 upper. But then you'll have to play with your spring rates to get it right. This will be difficult to do without knowing what your current spring rates are to kinda set a base line to start from, and without knowing your corner weights. You might be better off calling Jimmy Penner at EOR, send him some pics of your Jeep and tell him all the specs so he can guestimate weight, and buy new springs from him. Springs are not too awful expensive, then if you could figure out what # rating your current springs are, you could turn around and sell them on here pretty easily. Jimmy is who set mine up for me. I sent him several detailed pics of my rig and specs that are big weight factors, he sent my coilovers with 100/200 springs, was damn close, but ride height was too low, so I swapped the top 100# spring for 150# springs and it's perfect for me now. Mine are 14" Fox coilovers with a 16" lower spring and 14" upper. Jimmy is the suspension master, but they stay busy so it might take a bit to get ahold of him and for him to give you an answer, but it will be well worth the wait in your situation. [/QUOTE]
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