502 HO

461 HP @5,100 RPM / 558 LB-FT TORQUE @3,400 RPM
price: $9,176
part number: 12568778
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    Affordable Big-Block performance with huge torque and 461 hp With 461 horsepower and 558 lb-ft of torque, our 502 HO crate engine has power on tap for every need — whether it’s a ’69 Chevelle at the drag strip or the Suburban that towed it there. The 502 HO is all about torque and it hovers at the 558 lb-ft mark at only 3400 rpm and arcs gently above the 500 lb-ft level by 2800 rpm, remaining there through 4200 rpm. All those axle-twisting pound-feet are rooted in a stronger, updated four-bolt cylinder block that houses a forged steel crankshaft, forged and shot-peened rods, and forged aluminum pistons. In other words, it’s a super-stout assembly that is as durable as it is powerful. Iron, rectangular-port cylinder heads keep the 502 HO affordable, and our crate engine assembly includes an aluminum dual-plane intake manifold, a water pump, 14-inch flexplate, balancer, and more. You add the carburetor, starter, and ignition system.

    Part Number: 12568778
    Engine Type: Chevy Big-Block V-8
    Displacement (cu in): 502
    Bore x Stroke (in): 4.470 x 4.000
    Block: Cast-iron with 4-bolt main caps
    Crankshaft: Forged steel
    Connecting Rods: Forged steel, shot peened
    Piston and Ring Kit: Forged aluminum
    Camshaft Type: Hydraulic roller
    Camshaft Lift (in): .510 intake / .540 exhaust
    Camshaft Duration (@.050 in): 211° intake / 230° exhaust
    Cylinder Heads: Iron rectangular port; 118cc chambers
    Valve Size (in): 2.190 intake / 1.880 exhaust
    Compression Ratio: 8.75:1
    Rocker Arms: Stamped steel
    Rocker Arm Ratio: 1.7:1
    Water Pump: Cast-iron, long-style
    Flexplate: 14"
    Recommended Fuel: Regular pump
    Ignition Timing: 32° Total at 4,000 rpm
    Maximum Recommended rpm: 5,500
    Balanced: External
    Intake Manifold: Dual Plane

    • 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 NO 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.

Disclaimer: Vickar Community Chevrolet reserves the right to withdraw, change, modify or cancel this powertrain promotion program, any placed or in progress orders and the prices advertised at any time for any reason without prior written notice. Final decisions in all matters relating to the interpretation of any rule or aspect of this program rest solely with Vickar Community Chevrolet.