Page 55 of 2009 Performance Parts by GM Parts Direct

crate engines big-block zz502/502 base crate engines big-block 12496963 the diy foundation for more than 500 horses and tons of torque it s simple we offer the zz502/502 base engine for the builder who wants the super-strong bottom end and high-flow aluminum oval-port cylinder heads but also wants to finish the engine his way that could include a single four-barrel custom efi induction system or even a 6-71 supercharger to push through the hood of a 78 camaro the zz502/502 base engine uses our new cylinder block casting that is stronger and better-suited to high-performance combinations see page 230 for details a forged steel crankshaft forged rods and forged pistons form the reciprocating assembly while a smooth-operating hydraulic roller camshaft delivers big 0.527/0.544-inch lift the lightweight aluminum heads boast 110cc combustion chambers and big 2.25-inch intake and 1.88-inch exhaust valves with an aluminum intake manifold and a holley 870-cfm four-barrel carburetor both available from gm performance parts we rate the zz502/502 at 502 horsepower and 567 lb-ft of torque what can you get out of it new enhanced iron block the perfect foundation 502 hp 567 lb-ft torque installation notes · clutch linkage bosses are now drilled and tapped when using cast-iron exhaust manifolds lower head bolts may need to be replaced with bolts with shorter heads for clearance · new for 2009 502 engines now have a mechanical pump boss · comes with an externally balanced 14 automatic transmission flexplate use flywheel p/n 14096987 and 11 clutch assembly for manual transmission applications · designed for pre-1976 street vehicles or any off-road vehicle · not intended for marine applications 12371204 12568782 zz502 base kit nothing is quite as satisfying as building your own highperformance big-block with the zz502 base kit every part is engineered to work together to deliver 502 horses 502 partial engine this brand new partial engine includes the forged reciprocating components as well as the balancer oil pan and timing chain set zz502/502 dyno chart possible applications any vehicle that needs big-time power big-block bracket racing powerplant for a big-displacement street rod 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 zz502/502 base tech specs part number engine type displacement cu in bore x stroke in block p/n 19170540 crankshaft p/n 10183723 connecting rods p/n 19170198 pistons p/n 12533507 camshaft type p/n 12366543 camshaft lift in camshaft duration 050 in 12496963 chevy big-block v-8 502 4.47 x 4.00 cast-iron with 4-bolt main caps forged steel forged steel shot peened forged aluminum hydraulic roller .527 intake .544 exhaust 224° intake 234° exhaust cylinder heads p/n 12363390 valve size in compression ratio rocker arms p/n 12368082 rocker arm ratio recommended fuel ignition timing maximum recommended rpm balanced aluminum oval port 110cc chambers 2.25 intake 1.88 exhaust stainless steel 9.6:1 stamped steel 1.7:1 92 octane base 8° btdc 30° total 5800 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 114 buy online at www.gmperformanceparts.com 107 106 buy online at www.gmperformanceparts.com

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