Value-Priced Power, Great Durability, and Easy Power Upgrades This GM Performance engine uses the ZZ4 short block and adds to it the Fast Burn cylinder heads for 385 horsepower. The Fast Burn uses stamped steel 1.5 rocker arms and the same camshaft as the ZZ4, but these heads are hungry for more. Approximately 425 horsepower at 6000 RPM is achievable by adding a little more camshaft and 1.6 rocker arms (see More Details link below). The Fast Burn is an excellent choice for the basis of a custom engine. Its forged steel crankshaft and forged PM connecting rods are proven to 500 horsepower.
385 HP @ 5600 RPM385 ft/lbs TQ @ 4000 RPM (Max Recommended RPM: 5800) 9.6:1 Compression Ratio Cast Iron 4-Bolt Block with One-Piece Rear Main Seal Forged Steel Crankshaft High Silicon Aluminum Pistons w/Offset Pins PM Steel Connecting Rods Aluminum 62cc Fast Burn Chamber Cylinder Heads w/ 2.00'' Int./ 1.55'' Exh. Valves Steel Hydraulic Roller Cam, Lift: .474'' Int./ .510'' Exh., Duration @ .050: 208° Int./ 221° Exh. 1.5 Ratio Rocker Arms Aluminum Dual Plane Intake Manifold HEI Distributor 8'' High-RPM Torsional Damper Cast Iron Water Pump 12.75'' FlexplateRecommended spark plug: Accel #111-526 or any spark plug with 14mm .460" reach, 5/8" hex & tapered seatWarranty Information
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