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Thread: 243 LS heads - fully assembled

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  1. #1
    Join Date
    Apr 2006
    Location
    Bellevue, Nebraska
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    1,304
    Went to sleep, woke up, read this and lmao. Yes yes yes, bootlife, you are 100%correct! Continue to look for 243 heads that were only in a 6.0. -_- some people......
    Think of it this way. If they had different bowl sizes, then WTF would they have all the other head casting numbers??????? There'd be no point. 243 cast is a 243 cast no matter what they put it on!!!!

  2. #2
    Join Date
    Oct 2011
    Location
    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 10:22 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.

  3. #3
    Join Date
    Nov 2007
    Location
    Pittsburgh, PA
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    3,581
    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

  4. #4
    Join Date
    Oct 2011
    Location
    San Antonio TX
    Posts
    1,150
    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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