Last GM big block V8 rolls off the line

Discussion in 'OT Driven' started by TheWeasel, Dec 22, 2009.

  1. TheWeasel

    TheWeasel Guest

  2. GammaRadiation

    GammaRadiation Active Member

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    Good. It's an outdated design.

    The Chevy 350 was a fantastic small black but no one will argue that LS and LS bassed engines are infinitely better.
     
  3. art_VW_shark

    art_VW_shark OT Supporter

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    why does the LS7 not count?
     
  4. z284pwr

    z284pwr OT Supporter

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    I would assume it's because it's an LS based engine which is considered a 4th Generation Small Block, or at least to some.
     
  5. CJPA

    CJPA New Member

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    Gonna have to agree with you on that one. Advancements in small block tech have obsoleted big blocks for anything other than competition or marine purposes.
    Correct, it's a 427CI SMALL block V8.
     
  6. TriShield

    TriShield Super Moderator® Super Moderator

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    When did GM discontinue to the 8.1L truck V8?
     
  7. dr.zed

    dr.zed DR.ZED OT Supporter

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    Big blocks just mean physically the deck height and heads are different. Its physically a larger block, or taller to be more specific to allow a longer stroke and bore.

    Back in the day the "small" block was limited to 396 reliably but that was bored out to safe limits.

    The "big" block started at (I believe) 396 and went as high as 500 ci from a stock block.

    LSx engines with more meat and liner technologies are allowing for 427 combos very reliably. Actually ARE did somewhat reliable 427s from 346 ci LS1s in 1998.

    LT1s (another small block) could go as large as 415ci somewhat reliably... lol
     
  8. art_VW_shark

    art_VW_shark OT Supporter

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    whats the difference between big block and small block?
     
  9. art_VW_shark

    art_VW_shark OT Supporter

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    :bowdown:
    so would short blocks have shorter strokes?
     
  10. BlazinBlazer Guy

    BlazinBlazer Guy Witness to The De-Evolution of Mankind.

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    You could never get a GMT900 truck with the 8.1L V8, so it ended at the end of the GMT800 run in 2007.
     
  11. BlazinBlazer Guy

    BlazinBlazer Guy Witness to The De-Evolution of Mankind.

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    :mamoru:

    Umm, do you not realize what a short block is?

    Short block = block without heads installed

    Long block = block WITH heads installed



    However with that said, a block with a shorter bore can have a longer stroke with the use of short-skirt pistons.
     
  12. victimizati0n

    victimizati0n New Member

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    no, not really, yes the LS engines are better, but so many people still use big blocks, its not even funny.

    i guess this will give companies like dart, world, etc. more business
     
  13. victimizati0n

    victimizati0n New Member

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    where are you getting this information that says a chevy small block can be safely bored out to 396CI?

    im assuming you are talking about a standard 4" bore small block, and there is no way you could make a SBC 396CI and have it be reliable, that is over a .065" overbore with a 400 crank (which would be 389ci)

    im not aware of any SBC crank back in the day that was bigger than a 3.75" stroke, nor any production SBC that could be bored more than .060" without significantly making the block weak

    the big block started out at 348CI
     
  14. Mitchj

    Mitchj OT Supporter

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    its a enlarged 351 is why, which makes it a small block.
     
  15. GammaRadiation

    GammaRadiation Active Member

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    1.) That was the point.

    People still use Flatheads, that doesn't mean anything.


    2.) My point being, if we can improve the small black so substantially then I'm sure the big block can be improved substantially assuming there is even a need for such a motor anymore with today's small block tech.


    :rofl:
     
  16. art_VW_shark

    art_VW_shark OT Supporter

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    i meant small block :wtc:
     
  17. victimizati0n

    victimizati0n New Member

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    big blocks are king of the drag strip, its going to be 10-15 years before you start seeing ls engines start to become popular.. if they ever do... and im talking about real drag cars, not people taking their 150,000 mile 98 z28 to the track

    in order for them to become popular, there needs to be more choices of installing a distributor and a carb on the engine
     
  18. Mitchj

    Mitchj OT Supporter

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    why do carb engines make better performance cars?
     
  19. art_VW_shark

    art_VW_shark OT Supporter

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    can they jam more air in? a six barrel looks like it could get more air in than an electronic system with a small inlet
     
  20. Mr.Right

    Mr.Right N2O

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    cheaper and easier to work on.
     
  21. Mitchj

    Mitchj OT Supporter

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    what work do you need to do to them?

    Cheaper isnt really that big of a deal when you are going in an all out performance car.
     
  22. victimizati0n

    victimizati0n New Member

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    from what i have seen, a carb works just as good as fuel injection, and there is no difference in power between the two on a same spec engine (there may be a difference, but it is so minuscule, it doesnt count)

    you dont really need to do much work on them other than turning a few screws.
     
  23. GammaRadiation

    GammaRadiation Active Member

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    Just because it's a preference doesn't make it better and there's no replacement for displacement. If the path is laid and the technology is cheap, simple, and available people are going to use it for such activities.

    GM isn't building drag cars, they're building street cars.
     
  24. Mr.Right

    Mr.Right N2O

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    to "tune" a carb, all it takes, are a few simple hand tools, and a set of jets.

    you also dont need the extra wiring and sensors that EFI requires.

    carbs work just as good as EFI at WOT.

    so, for a drag racing application, its just easier and cheaper to run a carb, and get the same results as EFI.
     
  25. GammaRadiation

    GammaRadiation Active Member

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    All you need to tune some EFI systems is a lap top with USB2.0 and you can do it on the fly and your changes are accurate and precise. It also gives me feedback on things like A/F ratios, any misfires, knocking, flow rate, etc... etc... etc...

    Carbs are still used because people are resistant to change. Again, if the path is laid and the technology is cheap and available people are going to use it.
     

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