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How much lift will stock BB valve springs handle?

Discussion in 'The Garage' started by mountainexplorer, Apr 9, 2003.

  1. mountainexplorer

    mountainexplorer 1/2 ton status

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    For stock valve springs on Big Block heads, whats the largest cam that can be run?
     
  2. Sandman

    Sandman 3/4 ton status Author

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    I'm running a .520 lift cam on stock springs and have not had a problem yet. I mud race every chance I get so I dont baby it.
     
  3. HarryH3

    HarryH3 1 ton status Author

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    It may vary by head design. I'm putting a mild Comp Cams (11-206-3?) into a '90 454 with the peanut port heads. It's got pretty mild lift numbers (.450/.470??) yet Comp has a note in their catalog that says NOT to use stock valve springs with it.
     
  4. ratlover

    ratlover 1/2 ton status

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    Best approach is to actually check em. Yea it means yanking stuff apart but thats the only way to know for sure. Besideds, do you know if your stockers have enough pressure to work with your new cam? You should check that too. I'm anal though, but on the lazy side so instead of doing all that crap I would just buy new springs.
     

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