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Thread: 243 LS heads - fully assembled

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  1. #1
    Join Date
    Oct 2011
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    San Antonio TX
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    243s on a 4.8 equal 9.1 compression ratio.
    Last edited by RS/SS 4.8; 01-04-2013 at 09:22 PM.


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

  2. #2
    Join Date
    Nov 2007
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    Pittsburgh, PA
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    Quote Originally Posted by RS/SS 4.8 View Post
    243s on a 4.8 equal 9.1 compression ratio.
    8.8 going by gm listing for 2010 4.8
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  3. #3
    Join Date
    Oct 2011
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    I knew it the one I looked up was 9.1 for a 09 but I had posted 8.8 then changed it to 9.1. Free bump. GLWS


    4.8, TSP 220, 6L90 swap, 3400 Stall, 4.10s w/30" drag radial and T76 @ 16lbs.
    Best ET 11.54@114 w 1.52 60ft
    Raceweight 4905 lbs.

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