Page 48 of 2009 Performance Parts by GM Parts Direct

crate engines big-block zz427/480 crate engines big-block 19166393 a modern interpretation of the legendary l88 427 between 1967 and 1969 the alphanumeric designation that struck fear from main street to the drag strip was l88 it 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 gm performance parts has recreated that classic big-block combination in the zz427/480 rated at 480 horsepower like the original it features an iron block forged steel crankshaft and high-flow aluminum cylinder heads we ve upgraded the camshaft from the original s mechanical flat-tappet design to a more contemporary hydraulic roller giving this 21st-century l88 modern drivability characteristics and a greater rev range a lower 10.1:1 compression ratio makes it pump gas-friendly too the original l88 born in the time of leaded gasoline had 12.5:1 compression the zz427/480 comes complete with high-flow oval-port heads a highlift camshaft 0.510-inch intake/0.540-inch exhaust an aluminum intake manifold 870-cfm holley carburetor an hei distributor aluminum water pump balancer spark plug wires and a 14-inch flexplate 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 updated classic combination high-flow oval-port heads 480 hp 490 lb-ft torque 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 use flywheel p/n 12582964 and 11.5 clutch assembly for manual transmission applications · designed for pre-1976 street vehicles or any off-road vehicle · not intended for marine applications zz427/480 dyno chart possible applications a copo clone camaro your favorite 61 impala a stingray with a big stinger applications have not been validated they are merely suggestions of how you might enjoy your gm performance parts crate engine some applications may affect engine warranty see page 352 for specific warranty information some applications may not be emission-legal check state and local ordinances zz427/480 tech specs part number engine type displacement cu in bore x stroke in block p/n 19170538 crankshaft p/n 19171620 connecting rods p/n 19211226 pistons p/n 19171618 camshaft type p/n 12366543 valve lift in camshaft duration 050 in cylinder heads p/n 19211799 valve size in 19166393 chevy big-block v-8 427 4.25 x 3.75 cast-iron with 4-bolt main caps forged steel forged steel forged aluminum hydraulic roller 224° intake 234° exhaust .527 intake .544 exhaust aluminum oval port 110cc chambers 2.19 intake 1.88 exhaust compression ratio rocker arms p/n 12361323 rocker arm ratio distributor p/n 19212081 carburetor p/n 19170093 water pump p/n 19168602 spark plugs and wires flexplate p/n 12561217 recommended fuel ignition timing maximum recommended rpm balanced 10.1:1 aluminum roller style 1.7:1 hei type 770-cfm aluminum short-style included 14 92 octane base 10° btdc 36° total 6400 internal note distributor with melonized steel gear must be used with long blocks and partial engines with steel camshafts or engine damage will occur available for purchase online at gmperformanceparts.com gm performance parts crate engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty gm performance parts does not utilize any used or remanufactured parts in this crate engine for a complete list of parts to complement and finish this engine turn to page 114 buy online at www.gmperformanceparts.com 93 92 buy online at www.gmperformanceparts.com

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