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Coil over spring rates
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<blockquote data-quote="candocantrell" data-source="post: 708648" data-attributes="member: 9432"><p>Ive got some questions about the equivalent spring rate that i need for my jeep. </p><p></p><p>ive got a full body YJ with 5.3, th400, atlas, .120 cage, dana 60 front, 14 bolt rear, and 42's with H1 beadlocks (just for weight reference) </p><p></p><p>Ive got 14" radflo's on all 4 corners </p><p>I bought 200 lb/in springs for the front and 150 lb/in and used the deflection of the springs to calculate the sprung weight of the jeep. </p><p></p><p>deflection was 4" on all 4 corners with above spring rates, so that tells me that my front sprung weight is 800 lb per corner and my rear sprung weight is 600 lb per corner. </p><p></p><p>I'm shooting for 6" of up travel and 8" of droop. </p><p></p><p>With these numbers i called WOD and Adam told me that the equivalent spring rate should be the weight at any given corner divided by the length of droop that i am going to have. </p><p></p><p>That gives me equivalent spring rate up front of 800 lb / 8 in = 100 lb/in.... with the 200 lb spring rate that i have now, to get 100 lb equivalent i need to stack another 200 lb spring on top. so 200 over 200</p><p></p><p>The math is the same for the back 600 ln / 8 in = 75 lb/in for the equivalent spring rate.. with the 150's i have now i will need to stack 150 over 150 to get the equivalent 75 lb/in spring rate. </p><p></p><p>Spring rate is a subjective number so i know there may not be a right or wrong answer but im wanting some opinions based on the numbers i have. The people ive talked to so far say that these spring rates seem VERY stiff for the application. </p><p></p><p>Let me know what you think..</p><p></p><p>Thanks In Advance.....</p></blockquote><p></p>
[QUOTE="candocantrell, post: 708648, member: 9432"] Ive got some questions about the equivalent spring rate that i need for my jeep. ive got a full body YJ with 5.3, th400, atlas, .120 cage, dana 60 front, 14 bolt rear, and 42's with H1 beadlocks (just for weight reference) Ive got 14" radflo's on all 4 corners I bought 200 lb/in springs for the front and 150 lb/in and used the deflection of the springs to calculate the sprung weight of the jeep. deflection was 4" on all 4 corners with above spring rates, so that tells me that my front sprung weight is 800 lb per corner and my rear sprung weight is 600 lb per corner. I'm shooting for 6" of up travel and 8" of droop. With these numbers i called WOD and Adam told me that the equivalent spring rate should be the weight at any given corner divided by the length of droop that i am going to have. That gives me equivalent spring rate up front of 800 lb / 8 in = 100 lb/in.... with the 200 lb spring rate that i have now, to get 100 lb equivalent i need to stack another 200 lb spring on top. so 200 over 200 The math is the same for the back 600 ln / 8 in = 75 lb/in for the equivalent spring rate.. with the 150's i have now i will need to stack 150 over 150 to get the equivalent 75 lb/in spring rate. Spring rate is a subjective number so i know there may not be a right or wrong answer but im wanting some opinions based on the numbers i have. The people ive talked to so far say that these spring rates seem VERY stiff for the application. Let me know what you think.. Thanks In Advance..... [/QUOTE]
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