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Thread: has anyone used L92 heads on older 6.0 yet

  1. #1
    Join Date
    Feb 2007
    Location
    wtby ct
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    41

    has anyone used L92 heads on older 6.0 yet

    saw an article about the heads and wondering if anyone has swapped them on an older motor.im wondering if you use the intake also how to get around the 3 bolt and 4 bolt throttle bodys.and is there a big horepower gain.

  2. #2
    Join Date
    Dec 2007
    Location
    wichita falls, tx
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    3,067
    i too would like to know whos using the l92's on a 6.0, how well will they flow on a factory 4" bore?
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
    Intro Radicalli's

  3. #3
    Join Date
    Oct 2008
    Location
    Houston
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    807
    Going to lose lot of low end with those heads, even on a 6.0L

    Those huge intake runners are great up top but really going
    to zap low end intake velocity which is where you're low end torque comes from.

    Boosted motor would love em.
    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  4. #4
    Join Date
    Jan 2009
    Location
    Victoria, Tx
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    91
    Here is a 6.0 with L92 heads and Ls3 intake.

    LS1TECH - View Single Post - LS2 with L92 heads makes 460rwhp/446rwtq
    67 Camaro SS 350 and a 67 Camaro back half car
    99 Z28 Camaro (Old motor - 585rwhp / 602 rwtq)
    97 Nissan Maxima
    00 Chevy Tahoe
    21 Model T Roadster Pickup
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  5. #5
    Join Date
    Dec 2006
    Posts
    4,033
    Quote Originally Posted by r.barn View Post
    Going to lose lot of low end with those heads, even on a 6.0L

    Those huge intake runners are great up top but really going
    to zap low end intake velocity which is where you're low end torque comes from.

    Boosted motor would love em.
    you sure about that? i run 440 + torque and 450 + rwhp

    running the stock short block and ls3 heads with the l92 truck intake
    Simple: 408 on steroids!
    single digits coming soon!

  6. #6
    Join Date
    Oct 2008
    Location
    Houston
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    807
    Quote Originally Posted by skeet View Post
    you sure about that? i run 440 + torque and 450 + rwhp

    running the stock short block and ls3 heads with the l92 truck intake

    I'd love to see before and after dyno graphs and compare the WHOLE curve.

    There is top end torque
    There is low end toruqe
    There is avg. torque.

    Top end sounds great on the internet
    Low end gets you off the line
    Avg. is what wins the race.
    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  7. #7
    Join Date
    Dec 2006
    Posts
    4,033
    to the OP: heres my dyno charts with the ls3 heads and l92 truck intake, vs the vic jr with 5.3 heads

    http://www.ls1truck.com/forums/dynod...5-numbers.html
    Last edited by skeet; 06-21-2009 at 07:58 PM.
    Simple: 408 on steroids!
    single digits coming soon!

  8. #8
    Yup looks like the 5.3 had more peak HP and the L92s Made more AVG HP.

  9. #9
    Join Date
    Dec 2007
    Location
    wichita falls, tx
    Posts
    3,067
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
    Intro Radicalli's

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