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  1. 06-28-2009, 07:09 PM #1
    Customta98
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    Flame Red / Orange Custom
    1998 Trans Am

    Question Need help with commpression Test.

    Hello everyone,
    I am rebuilding my LS1 I got a new rotating assembly (stock stroke & stock 3.898in bore) and I port and polished my heads and valves just to clean them up it was a minor port and Polish. I did change out the stock cam for a comp cam (size Lift in/ex .522/.529 duration @.050 in/ex .212/.218) Xtreme RPM XR265HR Cam and comp cam's 1.85 roller rockers I just finished the bottom end and installed the heads torqued to spec, now I want to do a compression test to see how each cylinder is doing before I reinstall it with the new front suspension, that is why I am starting this thread I would like to know the stock compression of a 346 LS1 but I'm having a hard time finding it anywhere, any help would be greatly appreciated.
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  2. 06-29-2009, 11:56 PM #2
    mark21742
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    hugger orange
    2004

    you should have between 180-220 psi in all cylinders
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  3. 06-30-2009, 11:35 PM #3
    Customta98
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    Flame Red / Orange Custom
    1998 Trans Am

    Quote Originally Posted by mark21742 View Post
    you should have between 180-220 psi in all cylinders
    Cool thanx for the help
    98 Trans Am Custom Paint, Ghost Skuls On Racing Stripe + Custom Front Lip, :MODs Tubular K-member, Tubular Upper and lower A-arms, Tubular Control Arms, 4:10's, Cam L-.567/.575 D@.05-.212/.218,1.85 Roller Rockers, P&P Heads, ARH Headers & HF Cats & Y-Pipe, SLP loudmouth catback, +'s
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