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 Expert Member

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    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 Expert Member

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  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.
     
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  6. Jack Klarich

    Jack Klarich Expert Member

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  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