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Chevrolet Performance 12499121 - Chevrolet Performance Ram Jet 502 502ci/502HP Engine



Chevrolet Performance 12499121 - Chevrolet Performance Ram Jet 502 502ci/502HP Engine
Chevrolet Performance 12499121 - Chevrolet Performance Ram Jet 502 502ci/502HP Engine

JEGS Part Number: 809-12499121

Ram Jet 502 502ci Engine
  • 502 HP @ 5100 RPM
  • 565 ft/lbs TQ @ 3200 RPM
  • Calibrated Controller & Wiring Harness Included

    Chevrolet Performance 12499121 Details

    INSTALLATION NOTES:
  • The Ram Jet 502 requires a 12-volt power source (and ground), coolant, exhaust system, fuel feed, and fuel return line (to the fuel tank). An in-tank fuel pump is recommended
  • 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
  • Designed for pre-1976 street vehicles or any off-road vehicle
  • Not intended for marine applications
  • IMPORTANT! For a safe, proper, and trouble-free engine break-in, the MEFI 4 computer has a ''green'' mode that controls rpm during the break-in period. During this period, engine speed is limited to 4000 rpm in the first hour, 4500 rpm in the second hour, and 5500 rpm in the third hour.

  • Chevrolet Performance Ram Jet 502 502ci/502HP Engine

    Outrageous style and fuel-injected drivability - all with Big-Block power!

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    The Chevrolet Performance 502 Ram Jet Engine is unlike any other big block you've experienced. Chevrolet engineers designed the unique large plenum Ram Jet intake that produces a broad torque curve. The Ram Jet 502 blends the legendary torque and performance of the Big-Block with a modern port fuel injection system and tunnel ram-style intake manifold. It's a combination that offers awesome performance in a visually stunning presentation!

    The unique Ram Jet fuel injection system stands 11-inches tall at its highest point and consists of a two-piece manifold/plenum assembly, eight injectors, a throttle body, and an updated MEFI 4 controller. Setup instructions are included, making it a simple ''plug-and-play'' installation.

    Supporting the unique induction system is a robust bottom end with an all-forged rotating assembly and a smooth hydraulic roller camshaft. The heads are high-flow aluminum oval-port parts from Chevrolet Performance.

    Ram Jet 502 TECH SPECS:
  • Engine Type: Chevy Big-Block V-8
  • Displacement: 502ci
  • Bore x Stroke: 4.470'' x 4.000''
  • Block: Cast-iron with four-bolt main caps
  • Crankshaft: Forged steel
  • Connecting Rods: Forged steel, shot-peened
  • Pistons: Forged aluminum
  • Camshaft Type: Hydraulic roller
  • Camshaft Lift: .527'' intake / .544'' exhaust
  • Camshaft Duration (@.050 in.): 224° intake / 234° exhaust
  • Cylinder Heads: Aluminum oval port, 110cc combustion chambers
  • Valve Size: 2.250'' intake / 1.880'' exhaust, stainless steel
  • Compression Ratio: 9.6:1
  • Rocker Arms: Stamped steel
  • Rocker Arm Ratio: 1.7:1
  • Distributor: HEI type
  • Throttle Body: Included
  • Water Pump: Aluminum, short-style
  • Spark Plugs and Wires: Included
  • Flexplate: 14'' diameter
  • Recommended Fuel: 92 octane
  • Ignition Timing: Base 8° BTDC, 30° Total
  • Maximum Recommended RPM: 5800
  • Balanced: External
  • 11" Tall 2-piece Manifold Assembly
  • Includes: MEFI 4 Controller & Wire Harness

    GM Warranty

  • Chevrolet Performance 12499121

    Manufacturer's Part Number:
    12499121
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