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New heads, rocker arm, etc setup?

This is a discussion on New heads, rocker arm, etc setup? within the Internal Engine forums, part of the LSx Technical Help Section category; I have a '99 Camaro SS with many engine mods. Currently, I have Mike Morgan Sport heads and I am ...

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    1999 Camaro SS

    New heads, rocker arm, etc setup?

    I have a '99 Camaro SS with many engine mods. Currently, I have Mike Morgan Sport heads and I am going to replace them with newly acquired Patriot Perfromance heads.

    I am planning on ordering the Comp Cams 13705 roller rocker arms (1.85 ratio) and install Comp Cams 26921 valves springs.

    Also, replacing all of the hydraulic roller lifters with Comp Cams version.

    Does anyone see any mismatches here? I am doing the above due to multiple broken valve springs which started with the install of the Morgan Motorsport heads with their own valve springs, whereby the inner damper spring broke on about half of the valve springs. I have even broken one of the early 921 springs which were my replacement set.

    EDIT: Also getting 7.40" long push rods.
    Last edited by Doc99SS; 08-28-2006 at 04:27 PM.

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    Senior Member Redphoenix1998's Avatar
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    1998 Pontiac Trans Am

    You might want to double check your pushrod length. Might be too long. Stage II heads sometimes will come decked, so the pushrods might be too long. Broken springs, especially if they are duals can be caused by the wrong pushrods because it's too much tension on the springs causing abnormal spring fatigue. Just get a pushrods length check with the heads and check to make sure your valvetrain geometry is correct.

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