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Are the stock Ls1 valve springs weak?

This is a discussion on Are the stock Ls1 valve springs weak? within the Internal Engine forums, part of the LSx Technical Help Section category; In stock form are the stock LS1 valve springs weak? Are thy known to break?...

  1. #1
    Member importssuck's Avatar
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    Are the stock Ls1 valve springs weak?

    In stock form are the stock LS1 valve springs weak? Are thy known to break?

  2. #2
    Former Mopar Man 2002ssslp's Avatar
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    Not that I know of. I do not know the pressure they hold but I have not heard about a mass failure in those springs.

  3. #3
    Veteran 0rion's Avatar
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    on the stock cam they should last a good long while.......if you're asking because you want to use them with an aftermarket cam then they're a terrible option. Nothing past stock lift.

  4. #4
    Old Member, New Username BrownsMillsAntz's Avatar
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    Stock setup there fine...

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    404 Rwhp uncorrected @ 6400

  5. #5
    Moderator Firebirdjones's Avatar
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    They'll work if left alone, but yes they are somewhat weak. I've heard instances on low mile examples to only have as little as 60 lbs. seat pressure.

    It's also why they seem to like to bend pushrods when bounced off the rev limiter, the stock springs have terrible valve control at those rpms.

  6. #6
    dbl clutch'n like i shld WICKEDLS1's Avatar
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    they work just fine on the stock cam but HAVE to be upgraded if you install a bigger cam, might as well do retainers and locks while your in there too
    2000 ss camaro, forged lq9 370 short block, stage 3 PRC 243 heads, fast 102 w, big mouth throttle body, MS3 cam, 1.7 roller rockers, stage 3 t-56, monster stage 3, pro 5.0, 4.10's with moser axles, bmr tq arm, lca's, phb. SOLD (thankfully)!!!

    New project: 1968 step-side, partial restore, ls/th400 swap. hopefully boosted pics and more info to come!!!


    Having a small cam is like having a small dick, everytime you go to use it you wish it was bigger


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