Page 29 of 2009 Performance Parts by GM Parts Direct

crate engines small-block zz383 crate engines small-block 12498772 big-block performance in a small-block stroker package whether you re building a vintage camaro for cruise-night duty a mid1970s g-body for the strip or early full size car in need of some serious grunt the zz383 delivers big-block-style performance using the sturdy 383 bottom end including four-bolt mains a forged crankshaft and heavyduty rods we topped it with fast burn cylinder heads to enable 425 horsepower and 449 lb-ft of torque when finished with high-rise intake p/n 12496822 and a holley 770-cfm four barrel p/n 19170093 the fast burn heads use high-flow intake runners 2.00/1.55-inch valves and a unique combustion chamber design to process air quickly and efficiently a roller camshaft with more than 0.500-inch lift on both the intake and exhaust sides helps this potent engine maximize airflow it is complemented by friction-reducing aluminum roller-tip rocker arms the zz383 comes in base crate engine form with the aluminum fast burn heads installed as well as a cast-iron water pump and balancer the induction system ignition system and other accessories must be purchased separately your gm performance parts dealer has everything you need to build the complete engine with the zz383 you get the best of both worlds big-block power with small-block efficiency classic small-block `stroker sturdy bottom end four-bolt mains high-flow fast burn heads installation notes · requires addition of carburetor ignition intake manifold fuel pump water pump and starter not included · 425-horsepower rating achieved during gm testing with high-rise single-plane intake manifold p/n 12496822 and a 770-cfm carburetor with vacuum secondaries · gmpp dual-plane intake manifold p/n 12366573 may be used to avoid hood clearance problems but peak power may decrease by approximately 15-20 horsepower · comes with 12.75-inch automatic transmission flexplate requires 1986-1999 350-style externally balanced flywheel for manual transmission see chart on page 175 · designed for pre-1976 street vehicles or any off-road vehicle · not intended for marine applications 12499106 383 partial engine it comes with 4.00-inch bore/3.80inch stroke reciprocating assembly already installed including a forged steel crankshaft heavy-duty connecting rods and durable aluminum-alloy pistons zz383 dyno chart possible applications the perfect small-block for your 55 57 shoebox an 11-second starting point for your street/strip car a street car deserving big power a weekend race car that sees a lot of action 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 zz383 tech specs part number 12498772 engine type chevy small-block v-8 displacement cu in 383 bore x stroke in 4.00 x 3.80 block p/n 88962516 cast-iron with 4-bolt main caps crankshaft p/n 12489436 4340 forged steel connecting rods p/n 12497624 heavy-duty pm steel pistons p/n 12499103 hypereutectic aluminum camshaft type p/n 12370846 hydraulic roller camshaft lift in .509 intake .528 exhaust camshaft duration 050 in 222° intake 230° exhaust cylinder heads p/n 12464298 fast burn aluminum 62cc chambers valve size in 2.00 intake 1.55 exhaust compression ratio 9.6:1 rocker arms p/n 12367345 aluminum roller style rocker arm ratio 1.5:1 recommended fuel 92 octane ignition timing base 10° btdc 32° total maximum recommended rpm 6000 balanced external 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 56 buy online at www.gmperformanceparts.com 55 54 buy online at www.gmperformanceparts.com

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