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Thread: D2 spring rates

  1. 10th January 2025, 08:43 PM #1
    TonyC
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    D2 spring rates

    Hi All,
    I have a set of front springs from a TD5 D2, 7 seater with EAS and ACE.
    One has white paint marks, the other red/white marks.

    Can anyone tell me what rate they are?

    Thanks in advance.

    Tony
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  2. 10th January 2025, 08:55 PM #2
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    Slunnie
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    Are they standard springs? If they are, then the Td5 should be white/purple stripe. V8/TD5 springs are the same rate, the TD5 ones are just 6mm longer.

    However being Victorian, they are probably Rangie Spares springs (Les Richmond - White tiger or whatever they're called these days)
    White is 275lb/in 430mm free length (for Passenger side)
    Red/White is 275lb/in 475mm free length (for Drivers side)
    Cheers
    Slunnie


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  3. 11th January 2025, 07:02 AM #3
    TonyC
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    Quote Originally Posted by Slunnie View Post
    Are they standard springs? If they are, then the Td5 should be white/purple stripe. V8/TD5 springs are the same rate, the TD5 ones are just 6mm longer.

    However being Victorian, they are probably Rangie Spares springs (Les Richmond - White tiger or whatever they're called these days)
    White is 275lb/in 430mm free length (for Passenger side)
    Red/White is 275lb/in 475mm free length (for Drivers side)
    Thanks Simon,

    Do you know the rate of the white/purple stock spring?

    Free length is 370/385, they don't look look like a 275lb/in spring to me.

    I had assumed they were the standard springs, but you know what they says about assumptions.

    I did try and calculate out the rate, and got a stupid big number, I'll go back and and redo the maths.

    Tony
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  4. 11th January 2025, 10:07 AM #4
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    Slunnie
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    Hi Tony,

    I'm not sure what the spring rate is for them. I've just had a look in RAVE and can see:

    V8 front springs:
    Pink/Orange, 13.9mm wire, 7.6 coils, 377mm free length

    TD5 front springs:
    White/Purple, 13.9mm wire, 7.6 coils, 383mm free length

    Those springs calculate out at about 148lb/in but the rate in reality will be a bit higher due to redundant coils.
    Cheers
    Slunnie


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  5. 11th January 2025, 09:28 PM #5
    TonyC
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    My measurements were 14mm wire and 7.5 turns so very close to the stock spring.

    I found an online spring calculator that gives 169 lb/in.

    I found the formula, ironically in an AULRO post I'd made back in 2022, using that formula I get about 145,000 lb/in.

    At some stage I'll get my wife's vastly superior maths on the job, and work out what I'm doing wrong.

    Tony
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  6. 11th January 2025, 09:33 PM #6
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    Quote Originally Posted by TonyC View Post
    I get about 145,000 lb/in.
    You might need to increase the rebound control on your shocks.
    Cheers
    Slunnie


    ~ Discovery II Td5 ~ Discovery 3dr V8 ~ Series IIa 6cyl ute ~ Series II V8 ute ~
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  7. 11th January 2025, 10:04 PM #7
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    Tins
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    Quote Originally Posted by Slunnie View Post
    You might need to increase the rebound control on your shocks.
    Probably do away with them altogether. They won't compress much.
    ​JayTee

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