ZZ4 flywheel teeth
Racer
Joined: May 2002
Posts: 280
Likes: 0
From: Poughkeepsie New York
see Salle Chevrolet Website
ZZ4 ENGINE ASSEMBLY FEATURES
Intake Manifold: A new low-profile dual-plane aluminum intake manifold (#10185063) produces the same horsepower as previous high-rise designs, but provides increased hood clearance and more versatility. The new manifold has a dual-pattern flange that accommodates both standard-flange Holley and spread-bore Quadrajet four-barrel carburetors. It also has provisions for all late-model accessory brackets, EGR (exhaust gas re circulation), and an integral hot air choke. (Block-off plates are installed on the EGR and choke stove on H.O. 350 engines.)
Camshaft: A new hydraulic roller camshaft (#10185071) bolsters mid-range torque and improves drivability without sacrificing peak horsepower. This dual-pattern profile has .474” intake lift and .510” exhaust lift. Intake duration is 208 degrees (at .050” tappet lift), and exhaust duration is 221 degrees.
Valvetrain: The H.O. 350 valvetrain has been updated with light weight valve spring retainers that have half the mass of the previous design. Valve stem seals have been added to the exhaust valves to enhance oil control, and the aluminum cylinder heads are now outfitted with radiused valve seat inserts.
Rocker Covers: The H.O. engine’s stamped steel rocker covers orient the PCV valve properly for most applications.
Accessories: The 5.7-liter High Output engine assembly also includes a torsional damper, a cast iron water pump (standard rotation, long-style), a 12 3/4” diameter automatic transmission flexplate (153 tooth ring gear), and a dipstick. It does not include spark plug wires, pulleys, exhaust manifolds, a starter motor, an oil filter adapter, a fuel pump, or external accessories. Note: Service with eight AC FR5LS, 904, or MR43LTS spark plugs. If colder heat range is required, use FR3LS.
ZZ4 ENGINE ASSEMBLY FEATURES
Intake Manifold: A new low-profile dual-plane aluminum intake manifold (#10185063) produces the same horsepower as previous high-rise designs, but provides increased hood clearance and more versatility. The new manifold has a dual-pattern flange that accommodates both standard-flange Holley and spread-bore Quadrajet four-barrel carburetors. It also has provisions for all late-model accessory brackets, EGR (exhaust gas re circulation), and an integral hot air choke. (Block-off plates are installed on the EGR and choke stove on H.O. 350 engines.)
Camshaft: A new hydraulic roller camshaft (#10185071) bolsters mid-range torque and improves drivability without sacrificing peak horsepower. This dual-pattern profile has .474” intake lift and .510” exhaust lift. Intake duration is 208 degrees (at .050” tappet lift), and exhaust duration is 221 degrees.
Valvetrain: The H.O. 350 valvetrain has been updated with light weight valve spring retainers that have half the mass of the previous design. Valve stem seals have been added to the exhaust valves to enhance oil control, and the aluminum cylinder heads are now outfitted with radiused valve seat inserts.
Rocker Covers: The H.O. engine’s stamped steel rocker covers orient the PCV valve properly for most applications.
Accessories: The 5.7-liter High Output engine assembly also includes a torsional damper, a cast iron water pump (standard rotation, long-style), a 12 3/4” diameter automatic transmission flexplate (153 tooth ring gear), and a dipstick. It does not include spark plug wires, pulleys, exhaust manifolds, a starter motor, an oil filter adapter, a fuel pump, or external accessories. Note: Service with eight AC FR5LS, 904, or MR43LTS spark plugs. If colder heat range is required, use FR3LS.
