How do you tel what rear springs you have? |
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How do you tel what rear springs you have? |
Tdskip |
Dec 13 2018, 10:06 PM
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#1
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Advanced Member Group: Members Posts: 3,686 Joined: 1-December 17 From: soCal Member No.: 21,666 Region Association: None |
Time to educate myself on the rear suspension, it seems that the rear springs and shocks have quite a bit of options. Also seems that rear springs are the way to lower the car (seems obvious when I type that) and will have a big impact on ride stiffness.
Is there a way to tell what spring you have, maybe starting with ride height? Are the springs unique colors (common on Alfa’s) to make identification easier? Thanks! |
barefoot |
Dec 14 2018, 08:41 AM
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#2
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Senior Member Group: Members Posts: 1,274 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States |
Easier way:
Calculate the spring rate from a few dimensions you can make, then use the link: https://www.acxesspring.com/english/compres...lculations.html I measured my spare set (assembled), so free length is a guess, but spring rate not affected. Wire diameter = .387" Coil OD = 4.1" Number of coils = 10 Free length = 15 That yielded a rate of 62 Lb/inch |
Mark Henry |
Jan 15 2019, 06:37 PM
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#3
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Easier way: Calculate the spring rate from a few dimensions you can make, then use the link: https://www.acxesspring.com/english/compres...lculations.html I measured my spare set (assembled), so free length is a guess, but spring rate not affected. Wire diameter = .387" Coil OD = 4.1" Number of coils = 10 Free length = 15 That yielded a rate of 62 Lb/inch I just used the calculator for my set of unknown springs and a set of Weltmeister SP100 100 lbs springs. Specs unknown springs from the late 80's/early 90's bought at AA IIRC. Wire diameter = .475" Coil OD = 4.125" Number active of coils = 9 Free length = 12.5" = 160 lbs (159.5) Specs Weltmeister SP100 (100 lbs), springs are about 4 years old. Wire diameter = .425" Coil OD = 4.250" Number active of coils = 7 Free length = 15" = 120 lbs (119.64 lbs) So either the calculator is wrong or Weltmeister SP100 advertised as 100 lbs are actually 120 lbs springs. My unknown springs 160 lbs sounds about right. |
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