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Old 09-14-2019, 07:52 AM   #30
BT5210
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Join Date: Aug 2019
Posts: 52
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So I've been doing research on the front spring problem... I got on fords web site and found spring specs...there are 7 different springs available for the e350 chassis... mine a 2020 but I looked up and found info for a 2019... should be the same....anyway... when doing springs the first think you need to know is how much it weighs....on mine... the front axel is at 3000 lbs , then when I put the boat on back it drops to 2640 lbs....to find out the spring rate, you have to have either the spring part number, or the wire size...in my case, the wire size is .79... that is a 2900 lb spring, so X2 =5800 lbs..... there's the problem...that's about a 3000 lb too stiff of a spring... also that spring is not a variable rate it's constant...now, here's how I select the right spring... not always spot on with the first try, but close...with the front weight of 3000lbs, I add 10%..so 3300 lb spring should be right.....moog has 4 different springs for the e series...the part# cc81372...is a 1250 lb spring.. so X2 it's at 2500lbs...too soft...the rates are as follows....cc81370 =1523 lbs,...cc81368.. 1708 lbs,...cc81366.....1893 lbs...So with my weight of 3000 lbs....I gonna start with the cc81368...that puts me at 3416lbs of spring rate....which is close to my 3300lb need,...they are variable rate springs so the ride quality will be a huge gain...with that choice if I find it too soft or too harsh....there is a spring to go either way...the springs cost 95 bucks shipped to my door..and super easy to install...fingers cross'd that they work on the first try...
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