Details

ZZ4 350 Turn-Key Engine
405 lb.-ft. @ 3,600 rpm 355 hp @ 5,400 rpm

Affordable high-performance with everything you need to get running!

The ZZ4 350 crate engine is GMPP’s original affordable crate engine. In Turn-Key form, it comes with everything you need to get it running in your project vehicle.

High-flow aluminium heads are the keys to the ZZ4's robust 355hp and 405 lb.-ft. of torque. They boast 163cc intake runners, raised exhaust ports and tight, 58cc combustion chambers that enhance compression and power. The heads feature 1.94/1.50-inch valves for efficient performance.

The rest of the ZZ4 350 is comprised of premium materials, including a brand-new, four-bolt block, forged steel crankshaft, high-silicon pistons and a hydraulic roller camshaft. It also includes an aluminum intake, Holley four-barrel carburetor and HEI distributor, as well as a starter, water pump, fuel pump and front-end accessory drive kit – including an air conditioning compressor, alternator and more!

If you want to finish off the engine yourself, try the ZZ4 350 Base engine (P/N 24502609) at a lower price. It includes only the intake manifold, distributer, water pump, damper and flexplate.

ZZ4 350 Turn- Key Installation Notes

Comes with 12.75-inch externally balanced 153-tooth automatic transmission flexplate. Change to externally balanced flywheel for manual transmission application.

Requires fuel line from fuel pump to carburetor

Fuel pump pressure is pre-set; fuel pressure regulator not required

Some assembly and minor engine tuning required

Designed for pre-1976 street vehicles or any off-road vehicle

Not intended for marine applications

 

Specification

Tech Specs

ZZ4 350 Tech Specs 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 steel Pistons (p/n 10159436): High-silicon aluminum with offset pins 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): 1.940 intake / 1.500 exhaust Compression ratio: 10:1 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: 5,800 Balanced: External

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