Crate Engine, GM, 502 HO 461HP GM # 19433157

Chevrolet Performance 502 HO 461-HP Big Block Crate Engine Genuine GM®

461-hp 502 HO delivers 558 lb-ft with forged internals and a hydraulic-roller valvetrain.

Genuine GM® Chevrolet Performance 502 HO delivers 461 hp and 558 lb-ft from 502ci with 8.75:1 compression. The four-bolt cast-iron Big Block uses a forged-steel crankshaft and rods, forged-aluminum pistons, 118cc iron rectangular-port heads and a hydraulic-roller cam (.510/.540 lift; 212/230° at .050). The assembly includes dual-plane intake, water pump, flexplate and balancer.

Additional Technical Specifications • 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 • Piston and Ring Kit (P/N 12533507): Forged aluminum • Camshaft Type (P/N 24502611): Hydraulic roller • Camshaft Lift (in): .510 intake / .540 exhaust • Camshaft Duration (@.050 in): 211° intake / 230° exhaust • Cylinder Heads (P/N 12562920): Iron rectangular port; 118cc chambers • Valve Size (in): 2.190 intake / 1.880 exhaust • Compression Ratio: 8.75:1 • Rocker Arms (P/N 19260993): Stamped steel • Rocker Arm Ratio: 1.7:1 • Water Pump (P/N 19168606): Cast-iron, long-style • Flexplate (P/N 10185034): 14" • Recommended Fuel: Regular pump • Ignition Timing: 32° Total at 4,000 rpm • Maximum Recommended rpm: 5,500 • Balanced: External • Intake Manifold (P/N 19131359): Dual Plane • INSTALLATION NOTES • Requires addition of carburetor, fuel pump, starter, distributor and ignition system (not included) • 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