Crate Engine - BBC ZZ502/508HP Crate Engine - 502 Cubic Inch - 508 HP - Big Block Chevy The ZZ502/502 is one of the industry’s benchmark crate engines, offering excellent value with a proven combination of performance that is suitable for the street or strip. With more than 500 horsepower and 580 lb.-ft. of torque, it demands your full attention and a chassis that is strong enough to harness its frame-straining twisting power. Thanks to a combination of high-flow aluminum oval-port cylinder heads with 2.25/1.88-inch valves and a hydraulic roller camshaft designed to support low-rpm torque production, this torque monster tops the 500 lb.-ft. mark by approximately 2,500 rpm and doesn’t dip below it until about 5,000 rpm. It also features a latest-generation block casting with four-bolt main caps and an all-forged rotating assembly for exceptional strength and durability. Our Deluxe package comes complete from the oil pan to the carburetor, including an HEI distributor, plug wires, starter, water pump, balancer and an aluminum intake topped with a Holley 870-cfm four-barrel carburetor. TECH SPECSPart Number: 19331579Displacement (cu in): 502Bore x Stroke (in): 4.470 x 4.000Block (P/N 19170540): Cast-iron with 4-bolt main capsCrankshaft (P/N 10183723): Forged steelConnecting Rods (P/N 19170198): Forged steel, shot peenedPistons (P/N 12533507): Forged aluminumCamshaft Type (P/N 12366543): Hydraulic rollerCamshaft Lift (in): .527 intake / .544 exhaustCamshaft Duration (@.050 in): 224° intake / 234° exhaustCylinder Heads (P/N 19418910): Aluminum oval port; 110cc chambersValve Size (in): 2.250 intake / 1.880 exhaust; stainless steelCompression Ratio: 9.6:1Rocker Arms (P/N 12675724): Stamped steelRocker Arm Ratio: 1.7:1Distributor (P/N 93440806): HEI typeCarburetor (P/N 19170094): 870-cfmWater Pump (P/N 19168602): Aluminum, short-styleSpark Plugs and Wires: IncludedStarter (P/N 19302919): IncludedFlexplate (P/N 10185034): 14"Recommended Fuel: Premium pumpIgnition Timing: 32° Total at 4,000 rpmMaximum Recommended rpm: 5,800Balanced: ExternalIntake Manifold (P/N 12363407): Dual Plane INSTALLATION NOTES• Due to crate fitment, the carburetor is shipped in a separate box and needs to be installed by an engine installer• 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• 502 engines now have a mechanical fuel pump boss! NOTE: There is a fuel pump lobe behind the 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 NOTE: Distributor with melonized steel gear MUST be used with long-blocks and Partial engines with steel camshafts, or engine damage will occur.
