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GM Performance ZZ427/480 Crate Engine


GM Performance ZZ427/480 Crate Engine GM Performance Parts
    Parts #: 19166393
    Quantity in Basket: None

    Parts #19166393

    Between 1967 and 1969, the legendary L88 was the ultimate expression of Chevy's Big-Block power, combining a rigid iron cylinder block with lightweight aluminum cylinder heads and a single four-barrel carburetor. That raspy rat engine was rated at 480 horsepower, although the figure was generally thought to be on the conservative side.

    Chevrolet Performance has recreated that classic Big-Block combination in the Z427/480 — including the 480 horsepower rating (and it just might be a little on the conservative side, too). Like the original, it features a forged steel crankshaft and high-flow, oval-port aluminum cylinder heads. We've upgraded the camshaft from the original's mechanical flat-tappet design to a smoother hydraulic roller, which delivers great drivability characteristics and a broader rev range. A 10.1:1 compression ratio means it will perform great on pump gas, too.

    Whether you're building a '69 COPO Camaro resto-mod tribute, a modified mid-year Corvette, or a street-tire class winner, the ZZ427/480 is the heritage-inspired crate engine that delivers the performance that built the Big-Block's legendary reputation.

    GM Performance ZZ427


    Part Number: 19166393
    Engine Type: Chevy Big-Block V-8
    Displacement (cu. in.): 427
    Bore x Stroke (in.): 4.250 x 3.750
    Block (P/N 19170538): Cast-iron with four-bolt main caps
    Crankshaft (P/N 19171620): Forged steel
    Connecting Rods (P/N 19211226): Forged steel
    Pistons (P/N 19171618): Forged aluminum
    Camshaft Type (P/N 12366543): Hydraulic roller
    Camshaft Lift (in.): .527 intake / .544 exhaust
    Camshaft Duration (@.050 in.): 224° intake / 234° exhaust
    Cylinder Heads (P/N 19211799): Aluminum oval port, 110-cc chambers
    Balanced: Internal Valve Size (in.): 2.190 intake / 1.880 exhaust
    Compression Ratio: 10.1:1
    Rocker Arms (P/N 19210726): Aluminum roller style
    Rocker Arm Ratio: 1.7:1
    Distributor (P/N 19212081): HEI type
    Carburetor (P/N 19170093): 770-cfm
    Water Pump (P/N 19168602): Aluminum short-style
    Spark Plugs and Wires: Included
    Flexplate (P/N 12561217): 14"
    Recommended Fuel: 92 octane
    Ignition Timing: Base 10° BTDC, 36° Total
    Maximum Recommended rpm: 6400
    Balanced: Internal

    Installation Notes

    • Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installer
    • Requires addition of starter and fuel pump (not included)
    • Clutch linkage bosses are drilled and tapped. When using cast-iron exhaust manifolds, lower head bolts may need to be replaced with bolts with shorter heads for clearance
    • Comes with an internally balanced 14" automatic transmission flexplate. Requires flywheel designed for internally balanced engines
    • Designed for pre-1976 street vehicles or any off-road vehicle
    • Not intended for marine applications

    This is a Chevrolet Performance product.

    Price: $9,999.69