The ZZ502/502 Base Engine uses our new cylinder block casting that is stronger and better suited to high-performance combinations. A forged steel crankshaft, forged rods and forged pistons form the reciprocating assembly, with a smooth-operating hydraulic roller camshaft delivering big 0.527/0.544-inch lift. The lightweight aluminium heads boast 110cc combustion chambers and big, 2.25-inch intake and 1.88-inch exhaust valves. We rate the ZZ502/502 Base engine at 502 horsepower and 567 lb.-ft. of torque when it is finished with GMPP aluminium intake manifold P/N 12363406 (not supplied) and Holley 870-cfm carburettor (not supplied) P/N 19170094. The ZZ502/502 Base is a great foundation. It's up to you to make the most of it.

• Part Number: 12496963
• Engine Type: Chevy Big-Block V-8
• Displacement (cu in): 502
• Bore x Stroke (in): 4.470 x 4.000
• Block (P/N 19170540): Cast-iron with 4-bolt main caps
• Crankshaft (P/N 10183723): Forged steel
• Connecting Rods (P/N 19170198): Forged steel, shot peened
• Pistons (P/N 12533507): Forged aluminium
• Camshaft Type (P/N 12366543): Hydraulic roller
• Camshaft Lift (in): .527 intake / .544 exhaust
• Camshaft Duration (@.050 in): 224° intake / 234° exhaust
• Cylinder Heads (P/N 12363390): Aluminium oval port;
• 110cc chambers
• Valve Size (in): 2.250 intake / 1.880 exhaust;
• stainless steel
• Compression Ratio: 9.6:1
• Rocker Arms (P/N 12368082): Stamped steel
• Rocker Arm Ratio: 1.7:1
• Recommended Fuel: 92 octane
• Ignition Timing: Base 8° BTDC, 30° total
• Maximum Recommended rpm: 5,800
• Balanced: External

Product Reviews for GM12496963 - GM