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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Suspension Discussion and Modification
Geiser vs Eibach vs Collar
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<blockquote data-quote="Loufish" data-source="post: 1356030" data-attributes="member: 26247"><p>"<em>The spring rate stock is 533 lbs/inch</em></p><p></p><p><em>the spring rate stock with collars is 533 lbs/inch, with a 1.5"</em> <em>difference in static location</em></p><p></p><p><em>If you place 533 lbs on a stock truck and a truck with collars, the front will drop an inch on both</em></p><p></p><p><em>Where exactly is this "much more stiff ride" coming from?"</em></p><p><em></em></p><p>Lets do this by the numbers...So our 533 inch/lb spring will take 533 lbs to compress the first inch, and will take 1066 lbs to compress the second inch, and so on with a linear coil spring.</p><p></p><p>Lets take two of the same coilover shocks, both with our 533 in/lb springs. We have to collapse (preload) the springs 2 inches to mount them on the coilover. Now lets put them on a spring checker (measures lbs and travel) it should take about 1600 lbs to compress both of those 1" from fully extended. OK..lets preload one of those springs 1"...the shocks are still fully extended...but throw both back on our spring checker and the preloaded shock will take about 2133 lbs to compress 1", while the other is still about 1600 lbs...</p><p></p><p>So yes the actual spring rate hasn't changed, but the effective rate has..and to the other question, yes you could need to re-valve if you really crank in the preload...</p></blockquote><p></p>
[QUOTE="Loufish, post: 1356030, member: 26247"] "[I]The spring rate stock is 533 lbs/inch[/I] [I]the spring rate stock with collars is 533 lbs/inch, with a 1.5"[/I] [I]difference in static location[/I] [I]If you place 533 lbs on a stock truck and a truck with collars, the front will drop an inch on both[/I] [I]Where exactly is this "much more stiff ride" coming from?" [/I] Lets do this by the numbers...So our 533 inch/lb spring will take 533 lbs to compress the first inch, and will take 1066 lbs to compress the second inch, and so on with a linear coil spring. Lets take two of the same coilover shocks, both with our 533 in/lb springs. We have to collapse (preload) the springs 2 inches to mount them on the coilover. Now lets put them on a spring checker (measures lbs and travel) it should take about 1600 lbs to compress both of those 1" from fully extended. OK..lets preload one of those springs 1"...the shocks are still fully extended...but throw both back on our spring checker and the preloaded shock will take about 2133 lbs to compress 1", while the other is still about 1600 lbs... So yes the actual spring rate hasn't changed, but the effective rate has..and to the other question, yes you could need to re-valve if you really crank in the preload... [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Suspension Discussion and Modification
Geiser vs Eibach vs Collar
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