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Progressive Spring? Preload?

Discussion in 'XJ Technical Chat' started by myasylum, Jun 15, 2014.

  1. myasylum

    myasylum Member

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    Hi again!

    I bought a pair of Progressive Springs (11-1101) and I went to install them... I slid in the Spring and the included spacer and it sits exactly where the top cap would end. So it would have a "0" (or very little) preload. In a way... it fits perfectly under the cap... However I read there is suppose to be a 1" preload from what I have read. Should I be happy with it the way it is, or get a PVC piping that is 1" longer?

    Thanks!
     
    myasylum, Jun 15, 2014
    #1
  2. Polock

    Polock Well-Known Member

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    i'am thinking i tried 1 inch and took it out and put a extra 1/2 inch in. total 1.5 inches. 15wt fork oil, same amount as original
     
    Polock, Jun 15, 2014
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  3. myasylum

    myasylum Member

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    The PCV tubing that came with the springs were 2". I went to Home Depot and added a inch. Now the spring and adapter go up to the top of the fork tube for a 3/4" to 1" preload.

    I guess we'll see how that works?!
     
    myasylum, Jun 16, 2014
    #3
  4. Kickaha

    Kickaha Active Member Premium Member

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    There isn't a set figure for preload, you preload them by what you need to get the correct sag figure

    http://racetech.com/articles/SuspensionAndSprings.htm

    Although it might not work with as well with progressive as they seem to be a one size fits all and all the top stuff is single rate
     
    Kickaha, Jun 16, 2014
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