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ZZ502 Base

ZZ502 Base

SKU: 19433160

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 110-cc combustion chambers and big, 2.25-inch intake and 1.88-inch exhaust valves.


We rate the ZZ502/502 Base engine at 508 horsepower and 580 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


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

  • Horsepower

    508 HP

  • Torque

    580 LB-FT

  • Tech Specs

    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 four-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 12499255): Aluminum oval port; 110-cc 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: 5800

    Balanced: External

    Ignition Timing: 36-degrees @4,000 rpm

    Maximum Recommended rpm: 6,000

    Balanced: Internal

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