Page 112 of GM Performance Parts 2006 Catalog by GM Parts Direct

WHATS HOT? Modern Fuelie big-block Exceptional throttle response Forged crank CRATE ENGINES BIG-BLOCK 12499121 Ram Jet 502 110 GM Performance Parts does not utilize any used or remanufactured parts in this crate engine. GM Performance Parts crate engines include a twelve-month, 12,000-mile warranty. W RAM JET 502 TECH SPECS: Part Number: 12499121 Engine type: Chevy big-block V-8 Displacement (cu in): 502 Bore x stroke (in): 4.47 x 4.00 Block (P/N 10237292): Cast iron with 4-bolt main caps Crankshaft (P/N 10183723): Forged steel Connecting rods (P/N 10198922): Forged steel, shot peened Pistons (P/N 12533507): Forged aluminum Camshaft type (P/N 12366543): Hydraulic roller Camshaft lift (in): .527 intake .544 exhaust Camshaft duration (@.050 in): 224 intake 234 exhaust Cylinder heads (P/N 12363390): Aluminum oval port; 110cc chambers Valve size (in): 2.25 intake 1.88 exhaust; stainless steel Compression ratio: 9.6:1 Rocker arms (P/N 12368082): Stamped steel Rocker arm ratio: 1.7:1 Distributor (P/N 1104060): HEI type Throttle body (P/N 17113524): Included Water pump (P/N 14058915): Aluminum, short-style Spark plugs wires: Included Starter (P/N 9000852): Included Flexplate (P/N 10185034): 14" Recommended fuel: 92 octane Ignition timing: 8 BTDC 800 rpm; 36 total 5000 rpm Maximum rpm: 5800 With an 11" fuel-injected intake manifold flexing out of the top of a 502" big-inch Rat, the GMPP Ram Jet 502 is just plain cool. Not only attractive, the Ram Jet intake adds a significant amount of function to the big-block with amazing throttle response that you just have to experience to believe. Combining our aluminum-headed 502 with a modern fuel-injected intake results in 502 horsepower and 565 lb.-ft. of neck-snapping torque. With the Ram Jet intake, you also have over 500 lb.-ft. of torque available from 2200 rpm on up. Without question, that big, fuel injection intake stands out the most on the Ram Jet 502. Functional as it is attractive, the Ram Jet intake system enhances the already impressive torque band of the 502. The intake gobbles up air and stuffs it into the awaiting cylinders with incredible efficiency. The impressive intake only sits a half-inch taller than a comparable carbureted system with a high-rise intake manifold, Holley four-barrel carb and air cleaner. The Ram Jet 502 features a 4.00" forged crankshaft, 4.47" forged aluminum pistons, forged rods, and a roller camshaft. The aluminum heads are our highly efficient oval-port intake design, and they utilize 2.25" intake and 1.88" exhaust valves. Underhood clearance at the throttle body should be checked for interference.

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