All-New ZZ5 and Updated ZZ383 Crate Engines Pull Harder with New Fast Burn Heads and Beehive Valvetrain
By the way: You can spot the new crate engines at a glance, thanks to new Bowtie insignias on the ends of the heads – and all-new valve covers.
When it comes to Small-Block power, Chevrolet Performance's engineers keep finding new ways to add muscle to the iconic American V-8. For 2014, they've developed new Fast Burn cylinder head castings that incorporate beehive-style valve springs and complementing valvetrain components. The result is greater high-rpm range and durability – and power. The heads are the stars of an all-new ZZ5 350 crate engine and an updated version of the big-torque ZZ383 stroker engine.
The ZZ5 is rated at an impressive 400 horsepower, which is more than any small block 350 offered in a production car. The ZZ383 is rated at 450 horsepower. Both engines complement those high-rpm horses with low-rpm torque – at least 300 lb.-ft. by only 1,500 rpm – for that unmistakable feeling of immediate power that comes only from the Small-Block.
Chevrolet Performance offers the engines in Base, Deluxe and Turn-Key systems, allowing you to select the crate engine package that fits your budget and project plans.
Building on the strength and power of the legendary ZZ4 Small-Block, Chevrolet Performance engineers have upped the ante with a revised cylinder head design, new valvetrain components and more to create the all-new ZZ5 – a 400-horsepower 350 with loads of low-end torque. In fact, the new ZZ5 produces at least 300 lb.-ft. of torque by only 1,500 rpm, for a thrilling feeling of immediate performance.
The new, lightweight aluminum cylinder head casting is based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. New beehive-style valve springs enable greater high-rpm performance and durability, as the egg-shaped springs have less reciprocating mass in motion, require less spring pressure for greater valve control and handle valvetrain stresses more efficiently.
As with all of Chevrolet Performance's Small-Block crate engines, the ZZ5 is built with a brand-new block with four-bolt mains. It also features a forged steel crankshaft, an aggressive hydraulic roller camshaft and durable, high-silicon pistons. Unique valve covers distinguish this new crate engine at a glance, too.
The Base crate engine package includes an aluminum intake manifold, distributor, water pump, damper, flexplate and more.
Part Number: 19301293
Engine Type: Chevy Small-Block V-8
Displacement (cu in): 350
Bore x Stroke (in): 4.000 x 3.480
Block (P/N 10105123): Cast-iron with 4-bolt main caps
Crankshaft (P/N 12556307): Forged steel
Connecting Rods (P/N 10108688): Powdered metal
Pistons (P/N 10159436): Hypereutectic aluminum
Camshaft Type (P/N 10185071): Hydraulic roller
Camshaft Lift (in): .474 intake / .510 exhaust
Camshaft Duration (@.050 in): 208° intake / 221° exhaust
Cylinder Heads (P/N 19300955): Fast Burn aluminum; 62cc chambers
Valve Size (in): 2.000 intake / 1.550 exhaust
Compression Ratio: 9.72:1 nominal
Rocker Arms (P/N 10089648): Stamped steel
Rocker Arm Ratio: 1.5:1
Recommended Fuel: 92 octane
Ignition Timing: Base 10° BTDC, 32° Total
Maximum Recommended 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.