New GMPP 488 Crate Motor
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New GMPP 488 Crate Motor

  1. #1
    New here Beer:30's Avatar
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    Default New GMPP 488 Crate Motor

    I haven't been able to copy the picture of it, but I'll keep looking. Might have to print the page, scan it in, and launder it that way. The valve covers it comes with has bosses for coil-per-cylinder

    The only main thing I see keeping it from being "better" is the hyper pistons. They did a forged crank and rods, but failed to follow through on the pistons. Weird.

    Vortec 8.0L
    19256938

    Part Number: 19256938
    Engine Type: Chevy Big-Block V-8
    Displacement (Litre): 8.0L
    Displacement (cu in): 488
    Bore x Stroke (in): 4.270x4.250
    Block (P/N 19256820): Tall Deck (10.2")
    Fuel Requirements: LPG/CNG
    Crankshaft (P/N 19300876): Forged steel
    Connecting Rods (P/N 19256831): Forged steel
    Firing Order: 1-8-7-2-6-5-4-3
    Connecting Rod Ratio: 1.58:1
    Pistons (19256829): Hypereutictic w/anodized top ring land
    Camshaft Type (P/N 12556291): Hydraulic Roller
    Cylinder Heads (P/N 19256827): Fast Burn Iron
    Damper (P/N 19256830) Cast Iron
    Valve Train: Fully Adjustable
    Compression Ratio: 9.9:1 nominal
    Crankcase capacity: 8 Qts
    Maximum Recommended rpm: 4,500
    Balanced: Internal

    315 HP @ 4500 rpm (CNG)
    375 HP @ 4200 rpm (gasoline)
    390 LB-FT @ 3500 rpm (CNG)
    475 LB-FT @ 3200 rpm (gasoline

    A Big-Block for your truck – and it’s
    compatible with gasoline, CNG, or LPG!
    When it comes to grunt work – like pulling your car hauler or offshore
    racing boat – Chevrolet Performance’s new, heavy-duty 8.0L Big-Block
    does the job like no other engine.
    This latest edition of the classic Big-Block is all about torque and makes
    up to 475 lb.-ft. (on gasoline) by only 3,200 rpm – and maintains a
    smooth, flat and useful torque band across the entire rpm range. That
    gives your truck the power to pull just about anything and flatten the
    steepest grades.
    The 8.0L is built with a tall-deck (10.2-inch deck height) version of our
    latest Big-Block casting, which features full-length water jackets, thicker
    main bearing webs and four-bolt main caps. It also uses a forged steel
    crankshaft and forged connecting rods for optimum strength. A long,
    4.250-inch stroke helps maximize the torque.
    This modern Big-Block is equipped for a crank-triggered ignition system
    and features a 4X camshaft and 58X crankshaft reluctor wheels to
    support it. The engine can support fuel injection and also has a provision
    for a mechanical fuel pump.* Our assembly comes with heads and a
    balancer installed. An induction system, ignition, starter, water pump
    and other accessories are required to finish the engine.

    NOTE: This engine requires an intake manifold designed for a tall-deck block.
    Chevrolet Performance intake manifold P/N 88961161 was used in development.
    Conventional big-block intake manifolds can be used with spacers (not included).

    *Production 8.0L camshaft does not have a fuel pump lobe.
    *Chevrolet Performance Crate Engines include a 24-month
    or 50,000-mile/80,000-kilometer limited warranty.

    Sale Price: $6,766.18

    List Price: $6,932.56
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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  3. #2
    The member 1bdhondo's Avatar
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    Thats a nice motor for the money but 4500 rpm ? that sucks

  4. #3
    New here Beer:30's Avatar
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    Quote Originally Posted by 1bdhondo View Post
    Thats a nice motor for the money but 4500 rpm ? that sucks
    I agree. Hell, even the 8.1L is (only) 5100!

    Not sure what the whole 4500 thing is about.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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  6. #4
    The member 1bdhondo's Avatar
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    all those parts brand new for 6-7k lol crazy

  7. #5
    gn7
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    Senior Member gn7's Avatar
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    Why would you use forged pistons in an engine that spins 4500, and 475 HP?
    Lot of OEM engines out there making more power, at higher RPM, some even turbo'd with silicon alloy die cast pistons.
    The fact that the same assembly is available as CNG LPG may have played a huge part in that decision



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  8. #6
    Senior Member bp298's Avatar
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    it's a long block for a truck. not a complete engine...

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