348 Spring Part Number 143390 Spring Rates? | FerrariChat
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348 Spring Part Number 143390 Spring Rates?

Discussion in '348/355' started by Jasonberkeley, Oct 21, 2017.

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  1. Jasonberkeley

    Jasonberkeley Formula 3
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    #1 Jasonberkeley, Oct 21, 2017
    Does anybody know what the spring rates are for the following springs:
    143390-1090
    143390-100

    Thanks!

    Jason
     
  2. m.stojanovic

    m.stojanovic F1 Rookie
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    #2 m.stojanovic, Oct 21, 2017
  3. Jasonberkeley

    Jasonberkeley Formula 3
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    #3 Jasonberkeley, Nov 3, 2017
    So 143390 seems to be 360 lb/in
    148786 is 230 lb/in

    Anyone have any idea what 151881 spring rate is?

    Thanks,

    Jason
     
  4. Jasonberkeley

    Jasonberkeley Formula 3
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    #4 Jasonberkeley, Sep 3, 2018
    Still trying to see if anybodynknows the spring rate for p/n 151881?
     
  5. Wade

    Wade Three Time F1 World Champ
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    #5 Wade, Sep 3, 2018
    I don't know the spring rate, but this post is interesting:

    The above post is from this thread, along with these images posted by Daniel at Ricambi:


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  6. Wade

    Wade Three Time F1 World Champ
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    #6 Wade, Sep 3, 2018
  7. Wade

    Wade Three Time F1 World Champ
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    #7 Wade, Sep 3, 2018

    Attached Files:

  8. Jasonberkeley

    Jasonberkeley Formula 3
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    #8 Jasonberkeley, Sep 3, 2018
    Thanks Wade. Interesting info.

    Anyone have any idea how to convert the mm/N into english spring rates of lb/in?
     
  9. m.stojanovic

    m.stojanovic F1 Rookie
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    #9 m.stojanovic, Sep 3, 2018
    The given 2.311 and 2.744 "mm/N" cannot be the spring rates as it would mean very soft springs (around 2 lb/in). On the other hand, the table on the right (at bottom) states "Flexibility" in some "mm/da", whatever the "da" is.

    It appears that the shown "mm/N" actually means 0.02311 and 0.02744 mm/N respectively. I have made two calculations: one using the mentioned assumption and another using the given in the table free lengths and loaded lengths at the given loads (Excel file also attached).

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  10. Jasonberkeley

    Jasonberkeley Formula 3
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    #10 Jasonberkeley, Sep 4, 2018
    Thanks so much Miroljub! Greatly appreciated!
     

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