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Icon 2.5 C/Os + King 14x700 Springs

Discussion in 'Suspension' started by Slimwood Shady, Mar 27, 2012.

  1. Nov 28, 2018 at 2:41 PM
    #221
    Hans Moleman

    Hans Moleman Well-Known Member

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    If I get a 14" x 650lb spring to replace the stock 13" X 650lb Icon spring, would I theoretically require less preload and thus get a better ride?
     
  2. Nov 28, 2018 at 3:42 PM
    #222
    Dr. Sleep

    Dr. Sleep Well-Known Member

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    Basically, no. Both springs are a linear rate and they are the same rate (650 lb/ in). To achieve the same ride height, you would need to back off the preload nut (unscrew it) for the 14" long coilspring. But technically, the preload would be the same if the ride height is the same.
     
    DaveInDenver likes this.
  3. Nov 28, 2018 at 4:01 PM
    #223
    Hans Moleman

    Hans Moleman Well-Known Member

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    Makes sense. So I guess I should just get the 700lb spring.
     
  4. Nov 28, 2018 at 4:29 PM
    #224
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    Unexceptional
    I don't think it would be all for nothing.

    Take for example two Eibach springs, both 3.0" ID.

    1200.300.0600S
    12" length
    600 lb/in
    5.24" block height
    6.76" travel
    4,069 lbs load at block height

    1400.300.0600S
    14" length
    600 lb/in
    6.57" block height
    7.74" travel
    4,638 lbs load at block height

    I interpret that to mean that two springs of the same linear rate but different lengths, different number of wound turns wouldn't be the same performance necessarily. The amount of compression you need to set ride height might be the same (still thinking on that, not sure) but you get more travel. Where is that wrong? The difference in a 13" and 14" would I assume be proportionally less distinct, though.
     
  5. Nov 28, 2018 at 4:48 PM
    #225
    Dr. Sleep

    Dr. Sleep Well-Known Member

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    Your numbers don't add up. A 14" coilspring with 7.74" travel would have a block height of 6.26"; not 6.57". At a block height of 6.57 " it would only have 7.43" travel. But your point is well taken, that being, linear coilsprings aren't perfectly linear in their rates.
     
  6. Nov 28, 2018 at 4:49 PM
    #226
    Dr. Sleep

    Dr. Sleep Well-Known Member

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    And they definitely differ from one manufacturer to another.
     
  7. Nov 28, 2018 at 4:55 PM
    #227
    Dr. Sleep

    Dr. Sleep Well-Known Member

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    A better ride, which is what I assume you're after, is subjective. I'm not sure what you mean by a better ride. Please re-read post #219 from this thread and start there.
     
  8. Nov 28, 2018 at 4:55 PM
    #228
    DaveInDenver

    DaveInDenver Not Actually in Denver

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    That is a typo on my part. The 6.57" is the block height for the 700 lb/in. You are correct, 6.26" is the right number. Point being that a longer spring of the same rate does have some advantage, so the optimal configuration doesn't have to mean going to 700 lb/in, which may prove to be too stiff if you are using too little of the travel.

    Screen Shot 2018-11-28 at 5.54.06 PM.jpg

    Screen Shot 2018-11-28 at 5.55.06 PM.jpg
     
    Last edited: Nov 28, 2018

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