Valve Springs

Discussion in 'Harley Davidson Extreme Modification' started by abovethelaw, Jul 7, 2013.

  1. abovethelaw

    abovethelaw New Member

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    Can anyone tell me how to match the spring rate to a new cam. I want the 2 to for together for better performance. I want to go to a bee hive type spring but not sure what lift in a cam to get
     
  2. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    Can you give us more info on the motor. Have you done any mods? What type of motor are you trying to build?
     
  3. Jack Klarich

    Jack Klarich Guest

    More info is needed, some cams and valve springs may have to have more relief area in the rocker boxes
     
  4. Jack Klarich

    Jack Klarich Guest

  5. dolt

    dolt Senior Member Contributor

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    The '07 and later OEM beehive springs will accomodate cam lifts up to .600" lift. They are not heavy springs, IIRC, about 135# on the seats and, for most cams, will control the valves at the higher rpm levels for a typical street build. If the application is aggressive ramps and drag racing where high rpms are the order of the day; a spring with more seat pressure would be a better option.
     
    1 person likes this.
  6. Jack Klarich

    Jack Klarich Guest

  7. HDDon

    HDDon Experienced Member Contributor Retired Moderators

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    The OP has not been back on since posting the Thread.
     
  8. FishHunter

    FishHunter Active Member

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    AV&V, Bob Wood(PSI), Crane, and the S/E(Comp Cam) springs are all good.
    At one time years ago, Bob Wood had K-Motion providing him springs............THAT, was a genuine nightmare!:nosad