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Unread 12-27-2011, 07:56 PM   #16
2doorxj
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Quote:
Originally Posted by Hussler View Post
BDS says they mount the same, and suggested them originally when I asked for a softer rate. I will order them soon
They look different, theres no top tightly wound coil like on the XJs, or at least thats what this pic shows.

jk-coils.jpg  
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Unread 12-27-2011, 08:37 PM   #17
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Hmm, a couple threads with success. No mention of "fit" factor, but thanks for bringing it up just in case

http://www.naxja.org/forum/showthread.php?p=243701445
http://www.virtualjeepclub.com/showt...front-of-an-XJ
http://www.jk-forum.com/showthread.p...ap-easy-or-not
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Unread 01-12-2012, 08:06 PM   #18
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Alright I'm ready to order some springs, and I still really want the jk ones because of their spring rate.
On the BDS site it says they have the same ID
http://bds-suspension.com/product-display?all

The JK springs do have a decrease in diameter at the top

http://www.ebay.com/itm/Jeep-Wrangle...item43ac19137c

XJ springs

http://www.ebay.com/itm/PAIR-ORIGINA...item35b8689594

If they were a little too wide at the top, couldnt I just weld some circular plate to the top bucket to increase the diameter?
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Sometimes a restoration project is a labor of love, at which point cost, time, and labor involved become irrelevant.
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I see you also twizzled your scart lead. Well done! :thumbsup:
92 XJ with ARB's, 5" lift, too much armor, 33's and some other garbage
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Unread 01-12-2012, 08:13 PM   #19
jsawduste
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The JK springs look like they would be a progressive rate. Softer intail travel then firm up.
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Unread 01-12-2012, 08:36 PM   #20
Hussler
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Yes the rears look that way but not the fronts? Also looks like stock vs. stock the jk and xj springs have the same number of turns on their springs, so only height and coil thickness would be the determining spring rate factors?
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Quote:
Originally Posted by chris87xj View Post
Sometimes a restoration project is a labor of love, at which point cost, time, and labor involved become irrelevant.
Quote:
Originally Posted by BorderC View Post
I see you also twizzled your scart lead. Well done! :thumbsup:
92 XJ with ARB's, 5" lift, too much armor, 33's and some other garbage
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Unread 01-12-2012, 08:56 PM   #21
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Quote:
Originally Posted by Hussler View Post
Yes the rears look that way but not the fronts? Also looks like stock vs. stock the jk and xj springs have the same number of turns on their springs, so only height and coil thickness would be the determining spring rate factors?
Spring rates are determined by the diameter of the coil, the wire gauge and the number of active coils. Height has nothing to do with rates.

Progressive springs have less active coils as the spring compresses because as the closer windings touch, they become dead. More active coils, softer spring rate - less active coils, firmer spring rate.
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Unread 01-13-2012, 02:25 PM   #22
edpmedic
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http://www.efunda.com/DesignStandard...p_designer.cfm

http://www.pontiacracing.net/js_coil_spring_rate.htm

Hi i'm usually just in the ZJ forum but figured it's time to look around. You guys here are into the advanced stuff and I have not done much Mechanical Engineering since the slide ruler days. Anyway here are 2 sites that will allow you to figure out what your looking for. The thing is once you figure your rates out do they make what you want.
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