ZZ427/480
480 HP @6,000 RPM/ 490 LB-FT TORQUE @3,800 RPMprice: $17,687
part number: 19331572
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The classic L88 427 updated for the 21st century 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 ZZ427/480 — including the 480 horsepower rating. 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.
Part Number: 19166393
Engine Type: Chevy Big-Block V-8
Displacement (cu in): 427
Bore x Stroke (in): 4.250 x 3.750
Block: Cast-iron with 4-bolt main caps
Crankshaft: Forged steel
Connecting Rods: Forged steel
Pistons: Forged aluminum
Camshaft Type: Hydraulic roller
Valve Lift (in): .527 intake / .544 exhaust
Camshaft Duration (@.050 in): 224° intake / 234° exhaust
Cylinder Heads: Aluminum oval port, 110cc chambers
Valve Size (in): 2.190 intake / 1.880 exhaust
Compression Ratio: 10.1:1
Rocker Arms: Aluminum roller style
Rocker Arm Ratio: 1.7:1
Distributor: HEI type
Carburetor: 770-cfm
Water Pump: Aluminum short-style
Spark Plugs and Wires: Included
Flexplate: 14"
Recommended Fuel: Premium pump
Ignition Timing: 36° Total at 4,000 rpm
Maximum Recommended rpm: 6,400
Balanced: Internal
Intake Manifold: Dual Plane
• 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