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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 @ 5300 RPM
  • 568 ft/lbs TQ @ 3600 RPM
  • Calibrated Controller & Wiring Harness Included

    Chevrolet Performance 12499121 Details

    Ram Jet 502

  • 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: Premium pump (92 octane)
  • Ignition Timing: 35° Total @ 4000 rpm
  • Maximum Recommended RPM: 5800
  • Balanced: External
  • 11" Tall 2-piece Manifold Assembly
  • Includes: MEFI 4 Controller & Wire Harness

    GM Warranty

  • Chevrolet Performance 12499121

    Flywheel Included
    Engine Balance
    Wiring Harness Included
    Air Cleaner Included
    Carburetor Included
    Computer Included
    Crate Engine Cylinder Head Material
    Cylinder Heads Included
    Distributor Included
    Engine Assembly Style
    Long block
    Flexplate Included
    Harmonic Balancer Included
    Intake Manifold Included
    Oil Pan Included
    Sold individually
    Spark Plug Wires Included
    Spark Plugs Included
    Throttle Body Included
    Timing Cover Included
    Valve Covers Included
    Water Pump Included
    Rear Main Seal Style
    Manufacturer's Part Number:
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