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Thread: 4.8 5.3 bore questions

  1. #1

    4.8 5.3 bore questions

    I have a 4.8 and can get a 5.3 if I want to spend the money. Question is: Arent the block on the 4.8 and 5.3 the exact same? the 4.8 just wasnt bored out as much? why couldnt I bore out the 4.8 to the 5.8 bore or even more? then I would have a larger bore and a quick spinning assembly.

  2. #2
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    Same block different stroke and the 4.8 has flat top pistons.
    2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s

    2004 Buell XB12s

    Quote Originally Posted by LamboDoNoMo View Post
    "Never give up, NEVER BACK DOWN!!!"

  3. #3
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    5.3/6.0 crank in a 4.8=high compression 5.3
    2006 Silverado
    Little Black Bitch

  4. #4
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    arent the 4.8 pistons dished and the 5.3s are flat tops?

    Edit: Never mind your rite. lol
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    Last edited by casey.shoemake; 02-07-2010 at 09:31 PM.
    LS6, 222/224, Yank ss3600, 4.10s, Thorleys, HP tuned

  5. #5
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    it would be a 335

    you could do it but i don't think there is an off the shelf piston that would give you enough compression
    01 ecsb 5.3 4x4 z71
    Avalanche 17s and a pant load of miles

    61 Corvette
    350, 4 speed, 4.56's

    32 Ford 4 door sedan
    keeping it "stockish"

  6. #6
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    I think hes gonna buy my LS6 flat tops and do an iron LS1
    2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s

    2004 Buell XB12s

    Quote Originally Posted by LamboDoNoMo View Post
    "Never give up, NEVER BACK DOWN!!!"

  7. #7
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    or buy my 5.3 and use his flat tops!
    2006 Trailblazer SS RWD

  8. #8
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    Quote Originally Posted by MYSHTBX View Post
    or buy my 5.3 and use his flat tops!
    True story.
    2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s

    2004 Buell XB12s

    Quote Originally Posted by LamboDoNoMo View Post
    "Never give up, NEVER BACK DOWN!!!"

  9. #9
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    so many options!!!!
    5.3 and a 228r cam and have 400 bucks in it!
    2006 Trailblazer SS RWD

  10. #10
    Join Date
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    Someones a good salesman.
    2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s

    2004 Buell XB12s

    Quote Originally Posted by LamboDoNoMo View Post
    "Never give up, NEVER BACK DOWN!!!"

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