Page 60 of GM Performance Parts 2006 Catalog by GM Parts Direct

CRATE ENGINES CIRCLE TRACK A great racing engine based on our proven ZZ4 small-block crate engine! With the heart of the proven, durable ZZ4 crate engine, the 350/355 Limited Late Model factory-sealed racing engine has all the power to keep you at the front of the pack for Saturday nights feature race. The 350/355 is rated at 355 horsepower and 405 lb.-ft. of torque and has all the tough basics of the ZZ4 street engine, including a forged steel crankshaft, hypereutectic pistons, steel hydraulic roller camshaft and aluminum cylinder heads. The high-performance ZZ4 heads feature D-shaped exhaust ports and high-velocity intake runners to promote fast and unobstructed flow through the engine, providing great high-rpm performance on the racetrack. An 8-quart circle track oil pan, with dual kick-out design, handles the oil storage, along with a valve cover breather kit and special "kool nut" rocker nut design. The assembly also includes a dual-plane high-rise intake manifold, HEI distributor and cast iron water pump. Add your carburetor, starter and exhaust and dont forget to thank GM Performance Parts when giving your winners interview! WHATS HOT? Based on the ZZ4 405 lb.-ft. of torque High-performance heads 88958603 Circle Track 350/355 NOTE: Distributor included with the 350/355 engine has a melonized steel gear P/N 10456413. This MUST be used with engines with steel camshafts, or engine damage will occur. 58 GM Performance Parts does not utilize any used or remanufactured parts in this crate engine. CIRCLE TRACK 350/355 TECH SPECS: Part Number: 88958603 Engine type: Chevy small-block V-8 Displacement (cu in): 350 Bore x stroke (in) 4.00 x 3.48 Block (P/N 10105123): Cast iron with 4-bolt main caps Crankshaft (P/N 12556307): Forged steel Connecting rods (P/N 10108688): Powdered metal steel Pistons (P/N 10159436): Hypereutectic aluminum Camshaft type (P/N 10185071): Steel hydraulic roller Camshaft lift (in): .474 intake .510 exhaust Camshaft duration (@.050 in) 208 intake 221 exhaust Cylinder heads (P/N 12556463): Aluminum; 58cc chambers Valve size (in): 1.94 intake 1.50 exhaust Compression ratio: 10:1 Rocker arms (P/N 10089648): Stamped steel Rocker arm ratio: 1.5:1 Recommended fuel: 92 octane Ignition timing: 10 BTDC 800 rpm 32 total 4000 rpm with vacuum advance disconnected Maximum rpm: 5800

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