ZZ383 Engine - Big-block-style power from a small-block engine! If you’re looking for a small-block Chevy that makes big-block power, we’ve got the engine for you! For the ultimate GM Performance Parts small-block crate engine, choose the ZZ383—a combination of Fast Burn aluminum performance heads and a 383" stroker small-block that adds up to 425 horsepower and 449 lb.-ft. of torque. A carefully engineered balance of torque-producing bottom-end power and horsepower-inducing Fast Burn cylinder heads combine for the ZZ383/425’s stellar performance statistics. The Fast Burn heads have large 2.00"/1.55" valves and specially designed chambers that draw in lots of air and fuel, burning the mixture quickly and completely. It’s a combination that generates great mid- and high-rpm power, which, when combined with the 383 cubic inch displacement, creates an awesome all-around performer. The ZZ383 has a specially machined engine block and 3.80"-stroke crankshaft, which produce 383 cubic inches of pure performance. The reciprocating assembly is comprised of heavy-duty components including a 4340, nitrided, and inductionhardened forged crankshaft, and unique, heavy-duty powdered metal rods. It’s 425 horses of bulletproof performance. With the ZZ383/425, you get the power of a big-block with the size and weight of an aluminum-headed small-block.

• Displacement- 383
• Bore x stroke- 4.00 x 3.80
• Block- cast iron with 4-bolt main caps
• Pistons- hypereutectic aluminum
• Camshaft Type- hydraulic roller
• Camshaft Lift- .509 intake/.528 exhaust
• Camshaft Duration(@.050in)- 222 intake/ 230 exhaust
• Cylinder Heads- fastburn aluminum, 62cc chambers
• Valve Size -2.00 intake/1.55exhaust
• Compression- 9.6:1
• Rocker Arms- aluminum roller style
• Rocker Arm Ratio- 1.5:1
• Ignition Timing- base 10 degree bdtc, 32 degree total
• Recommended Fuel -92 octane
• Maximum RPM- 6000
• Balanced- external
• Horsepower- 425 @ 5400rpm
• Torque -449 @ 4500rpm

Notes:

This engine is not designed, nor intended to be used in any marine applications. Engines installed in vehicles registered and normally operated outside of the United States carry no warranty.