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Thread: TR224 w 918s, shims?

  1. 04-13-2011 12:48 PM #1
    01silverado
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    TR224 w 918s, shims?

    01 5.3l silverado
    I have a TR224 .563 lift cam. I am about to install some new 918 springs. Assuming my install height is 1.8, should I shim? Comp Cams told me not to shim. Others have said shim .030
    Any help is appreciated

    Jason
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  2. 04-13-2011 01:14 PM #2
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    beingblueeyes
    beingblueeyes is offline Senior Member
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    shimming hurts heat exchange from the valve springs to the heads, so unless its necessary its not recommended

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  3. 04-13-2011 01:34 PM #3
    RedHeartbeat
    RedHeartbeat is offline WTH JUST HAPPENED?
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    Really? That GD HKE shimmed mine. 030".
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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  4. 04-13-2011 01:55 PM #4
    GraniteBlueNNBS
    GraniteBlueNNBS is offline Senior Member
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    to my knowledge shims are used to ensure that the valve spring has the proper load at installed height. Some may need them some may not.
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  5. 04-13-2011 03:26 PM #5
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    Frenchy
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    Quote Originally Posted by GreenMonster View Post
    to my knowledge shims are used to ensure that the valve spring has the proper load at installed height. Some may need them some may not.
    This. Guys to do it to make sure all the springs are the same, or to eek a bit more life out of them after they've began to weaken.
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