The DIY Foundation for Big Torque!
It’s simple: We offer the ZZ502/502 Base crate engine for builders who want the super-strong bottom end and high-flow aluminum oval-port cylinder heads, but also want to finish the engine their way.

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 aluminum 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 Chevrolet Performance aluminum intake manifold P/N 12363406 and Holley 870-cfm carburetor P/N 19170094. The other parts you need to complete the engine – including chrome dress-up parts – are available from your dealer and www.Chevrolet.com/Performance.

The ZZ502/502 Base is a great foundation. It’s up to you to make themost of it.

ZZ502/502 BASE TECH SPECS
Part Number: 19331576
Engine Type: Chevy Big Block V8
Displacement (cu in): 502
Weight: 504
Horse Power: 502
Torque: 567
Trans*: C
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 Aluminum
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): Aluminum 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

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
• 502 engines now have a mechanical fuel 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

ZZ502 Base Warranty Detail PDF