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Chevrolet Performance 12499120 - Chevrolet Performance Ram Jet 350 350ci/350HP PFI Engine

Chevrolet Performance 12499120 - Chevrolet Performance Ram Jet 350 350ci/350HP PFI Engine

JEGS Part Number: 809-12499120

Ram Jet 350 350ci Engine
  • 350 HP @ 5200 RPM
  • 400 ft/lbs Torque @ 3500 RPM

    Chevrolet Performance 12499120 - Chevrolet Performance Ram Jet 350 350ci/350HP PFI Engine Details

  • Comes with externally balanced, manual transmission flywheel; change to externally balanced flexplate for automatic transmission applications
  • Installer to supply 12-volt power source and fuel
  • See installation instructions for fuel pump recommendation
  • 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.

  • Vintage Style and Modern Performance

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    Chevrolet Performance's unique Ram Jet 350 combines the classic look of the original Rochester mechanical injection system with the dependability and optimized performance of contemporary electronic port fuel injection.

    They took their proven 350 Small-Block and topped it with an exclusive port fuel-injection system that emulates the look of Chevy's factory fuel-injection systems from the 1950s and '60s. It's the perfect choice for a resto-mod hot rod from the original Rochester era.

    A brand-new engine block is matched with a durable rotating assembly that delivers a pump-gas friendly 9.0:1 compression ratio, as well as a smooth hydraulic roller camshaft that complements power delivery with a great idle quality. The engine's unique intake manifold and plenum is 9-3/4'' tall, offering plenty of clearance to fit under the hood of most vehicles without modifications.

    The Ram Jet 350 crate engine kit includes a MEFI 4 engine controller, wiring harness and a detailed instruction guide to make adding this retro-style EFI system a complete DIY project. Some additional components are required, including a high-pressure fuel pump and front accessory drive system.

  • Engine Type: Chevy Small-Block V-8
  • Displacement: 350ci
  • Bore x Stroke: 4.000'' x 3.480''
  • Block: Cast-iron with two-bolt main caps
  • Crankshaft: Cast-iron, 1-piece rear main seal
  • Connecting Rods: Powdered metal steel
  • Pistons: Hypereutectic aluminum
  • Camshaft Type: Hydraulic roller
  • Camshaft Lift: .460'' intake / .481'' exhaust
  • Camshaft Duration (@.050 in.): 196° intake / 206° exhaust
  • Cylinder Heads: Vortec cast-iron, 64cc combustion chambers
  • Valve Size: 1.940'' intake / 1.500'' exhaust
  • Compression Ratio: 9.0:1
  • Rocker Arms: Aluminum roller rockers
  • Rocker Arm Ratio: 1.6:1
  • Water Pump: Cast-iron, long-style
  • Distributor: HEI type
  • Spark Plugs and Wires: Included
  • Flywheel: 14'' diameter, 168-tooth (11.000''; 11.850'' clutch diameter)
  • Recommended Fuel: 92 octane
  • Ignition Timing: Base 10° BTDC, 32° Total
  • Maximum Recommended RPM: 5500
  • Balanced: External
  • GM Warranty

    Chevrolet Performance 809-12499120

    Manufacturer's Part Number:
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