Quote:
Originally Posted by Evil XT
Did anyone find the OEM spring rates?
I cant find them anywhere..
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Well, I got a set of stock springs (and struts/shocks) in the other day, and today I finally had a few minutes to take some notes and measurements. Here's a breakdown of what I found, along with the results of my spring rate calculator:
Front Springs
Outside DIA = 5.5"
Wire DIA = 0.455"
# Free Coils = 5.5
Calculated Spring Rate = 111 lb/in
Rear Springs
Outside DIA = 4.25"
Wire DIA = 0.415"
# Free Coils = 5.0
Calculated Spring Rate = 158 lb/in
I still have to do a reality check on these calculated rates by putting them in my press and seeing what they say on a scale. The formula, for those interested, is:
Rate = [(G)x(d^4)] / [8x(n)x(D^3)]
where
G = 12,000,000
d = wire DIA (inches)
n = number of free coils (use total coils - 1.5 if in doubt)
D = coil DIA (coil outside DIA - wire DIA)
Gotta separate a strut from it's coil before I can do the reality check, so I'll get those numbers as soon as I get some more free time.
HF