12499712 ZZ4 350/355HP TURN KEY GM CRATE ENG

As far as crate engines go, this one is a winner. The ZZ4 350 Turn-Key crate engine has been one of our most popular high performance crate engines since we started GM Performance Parts. Its legendary status is based on an incredible performance level that is stone cold reliable. We've packed the ZZ4 350 crate engine with a forged steel crankshaft, hypereutectic pistons, hydraulic roller camshaft and lifters, and aluminum cylinder heads. The ZZ4's Corvette-derived high-performance heads feature high velocity intake runners and D-shaped exhaust ports to promote efficient and unobstructed flow through the engine, providing strong power and torque at all RPM levels.
Block Part Number:
10105123
Block Type:
Cast iron with 4-bolt main caps
Bore x stroke (in):
4.00 x 3.48
Camshaft duration (@.050 in):
208? intake / 221? exhaust
Camshaft lift (in):
.474 intake / .510 exhaust
Camshaft Part Number:
10185071
Camshaft type:
Steel hydraulic roller
Compression ratio:
10:1
Connecting Rod Part Number:
10108688
Connecting rods Type:
Powdered metal steel
Crankshaft Part Number:
12556307
Crankshaft Type:
Forged steel
Cylinder head Part Number:
12556463
Cylinder head Type:
Aluminum; 58cc chambers
Displacement (cu in):
350
Engine Name:
ZZ4 350:
Engine type:
Chevy small-block V-8
Ignition timing:
10? BTDC @ 800 rpm 32? total @ 4000 rpm with vacuum advance disconnected
Maximum rpm:
5800
NOTE:
Distributor with melonized steel gear MUST be used with long blocks and partial engines with steel camshafts, or engine damage will occur.
Piston Part Number:
10159436
Pistons Type:
High-silicon aluminum with offset pins
Recommended fuel:
92 octane
Rocker arm ratio:
1.5:1
Rocker arms Part Number:
10089648
Rocker arms Type:
Stamped steel
Valve size (in):
1.94 intake / 1.50 exhaust

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