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Help Support Hardline Crawlers :
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Rock Crawling Forums
General Discussion
Need some help with a coilover spring decision...
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<blockquote data-quote="mac5005" data-source="post: 575079" data-attributes="member: 4650"><p><strong>Re:</strong></p><p></p><p>Read the spring tech thread for sure. </p><p></p><p>I have a yj on tons with cage, fuel cell, tool box etc. Pretty sure I ended up with 170/175 springs on the rear, with 2.25" preload. </p><p></p><p> Ideal springs would have been 150/200, but I was being cheap and wanted to reuse a pair I already had, so I compromised by only ordering one pair.</p><p></p><p>My 14" c/o are set between 7 up 7 down, and 6 up 8 down at ride height.</p><p></p><p>You can install the springs you have, measure your height and do the math to figure out what springs to order, to have correct ride height with desired preload. </p><p></p><p>Or go to this link, </p><p></p><p>http://metalwerxdesign.com/files/springcalculatorv2.xlsx</p><p></p><p>and download the excel file, enter your specs, and it calculates your new desired overall rate. Then just looking the excel chart and pick the spring combo that matches the initial rate. </p><p></p><p>I created the excel file to help make spring selection easy. </p><p></p><p>It's ideal to shoot for 50 lbs different rate between the two springs, so that you can tune the height of the crossmember over rings to minimize body roll. You want the crossover rings 1-3" above the dual rate slider at ride height, with driver and passenger weight in the vehicle. </p><p></p><p> I tuned the valving for my desired ride quality and driving style. </p><p></p><p>In short:</p><p></p><p>2" preload, 50 lbs rate split between springs, x-over ring 2" above dual rate slider. Start with that and tune your valving.</p></blockquote><p></p>
[QUOTE="mac5005, post: 575079, member: 4650"] [b]Re:[/b] Read the spring tech thread for sure. I have a yj on tons with cage, fuel cell, tool box etc. Pretty sure I ended up with 170/175 springs on the rear, with 2.25" preload. Ideal springs would have been 150/200, but I was being cheap and wanted to reuse a pair I already had, so I compromised by only ordering one pair. My 14" c/o are set between 7 up 7 down, and 6 up 8 down at ride height. You can install the springs you have, measure your height and do the math to figure out what springs to order, to have correct ride height with desired preload. Or go to this link, http://metalwerxdesign.com/files/springcalculatorv2.xlsx and download the excel file, enter your specs, and it calculates your new desired overall rate. Then just looking the excel chart and pick the spring combo that matches the initial rate. I created the excel file to help make spring selection easy. It's ideal to shoot for 50 lbs different rate between the two springs, so that you can tune the height of the crossmember over rings to minimize body roll. You want the crossover rings 1-3" above the dual rate slider at ride height, with driver and passenger weight in the vehicle. I tuned the valving for my desired ride quality and driving style. In short: 2" preload, 50 lbs rate split between springs, x-over ring 2" above dual rate slider. Start with that and tune your valving. [/QUOTE]
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Need some help with a coilover spring decision...
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