Chevrolet Performance SP383 EFI Turnkey Crate Engine – 19433046 – 450 HP

The Ultimate SP383 EFI Crate Engine for Classic Performance with Modern Convenience

The Chevrolet Performance SP383 EFI turnkey crate engine (19433046) is the perfect blend of classic small-block torque and contemporary electronic fuel injection convenience . As part of our extensive Small Block Chevy collection, this 383 cubic inch stroker V8 produces an impressive 450 horsepower and 436 lb-ft of torque—making it the ideal choice for enthusiasts who want the ground-pounding torque of a stroker with the drivability of modern EFI .

Whether you’re restoring a classic Chevelle, Camaro, or hot rod, this SP383 EFI crate engine delivers the power, reliability, and modern convenience that serious builders demand. This turnkey assembly is delivered with most of the engine accessories required to get the engine running in your project vehicle .

What Makes the SP383 EFI the Ultimate Small-Block Crate Engine?

The SP383 EFI is engineered for enthusiasts who want the strong pull of the proven 383 “stroker” combination and the contemporary convenience of electronic fuel injection . Chevrolet Performance’s stroker crate engine is part of their Street Performance range, designed for optimal performance on the street and the occasional trip down the quarter-mile .

SP383 EFI Horsepower and Torque Figures

This 383 stroker crate engine produces impressive output that makes it a favorite among classic car builders:

• 450 horsepower – dyno tested and verified 

• 436 lb-ft torque – stout low-end and mid-range power 

• 9.72:1 compression ratio – pump gas friendly 

• Hydraulic roller cam – low maintenance, excellent durability 

• 6,000 RPM maximum recommended engine speed 

Complete SP383 EFI Engine Specifications

Engine Block and Rotating Assembly

The foundation of this 383 stroker crate engine is a cast iron block with 4-bolt main caps featuring :

• 4-bolt main caps for exceptional bottom-end strength

• 1-piece rear main seal for leak-free operation

• 4.005-inch bore x 3.800-inch stroke 

• External engine balance 

• Forged steel crankshaft for durability 

• Heavy-duty forged steel connecting rods 

• Hypereutectic aluminum pistons 

• 9.72:1 compression ratio 

Fast Burn Aluminum Cylinder Heads

The SP383 EFI is topped with Fast Burn aluminum cylinder heads—some of the best-flowing production heads GM ever produced :

• 62cc combustion chambers 

• 2.000-inch intake valves 

• 1.550-inch exhaust valves 

• Beehive-style valve springs for high-rpm performance and durability 

• Aluminum roller-style rocker arms with 1.5:1 ratio 

Steel Hydraulic Roller Camshaft Specifications

Port-Style EFI System

The SP383 EFI incorporates a port-style injection system with a unique design :

• Injectors plumbed in a carburetor-style intake manifold 

• Throttle body mounted in the conventional position of the carburetor 

• Allows for a traditional air cleaner and classic appearance 

• Vintage look with contemporary drivability 

What’s Included with Your Turnkey SP383 EFI Crate Engine

The 19433046 is a comprehensive turnkey assembly with the following components included :

Important Note: For manual transmission applications, an externally balanced flywheel is required (not included) . The included flexplate is designed for automatic transmission applications .

SP383 EFI Crate Engine Installation Notes

Important Considerations Before Installation

Before installing your Chevrolet Performance SP383 EFI crate engine, review these critical notes:

• Not intended for marine applications 

• Designed for pre-1976 street vehicles or off-road applications 

• Requires premium pump fuel for optimal performance 

• 36° total timing at 4,000 RPM is recommended 

• 6,000 RPM maximum recommended engine speed 

• Distributor with melonized steel gear MUST be used with steel camshaft applications, or engine damage will occur 

ECU and EFI System Notes

The SP383 EFI includes a pre-programmed, self-learning control system . This means:

• The ECU comes pre-programmed for the engine

• The system is self-learning and will adapt to your specific vehicle

• All necessary sensors and wiring are included

Emissions and Warranty Information

Emissions Compliance: This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for closed competition racing .

Warranty: Chevrolet Performance crate engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty .

Important Supercession Information

Part number 19433046 replaces 19432113, 19420597, and 19419199 . It has been superseded by 19435454 .

SP383 EFI vs SP383 Deluxe – Understanding the Difference

Chevrolet Performance offers multiple SP383 variants:

The SP383 EFI (19433046) is the premium option with the complete EFI system, ECU, wiring harness, and all accessories included for a true turnkey experience.

SP383 EFI Crate Engine FAQs

How much does the SP383 EFI crate engine cost?

The 19433046 has been superseded by 19435454 . Pricing for the current version is approximately $14,312 . Contact NH Race Engine for current European pricing and availability.

What’s included with the SP383 EFI turnkey engine?

The SP383 EFI comes as a comprehensive turnkey package including the long block, EFI system, ECU, wiring harness, distributor, water pump, harmonic balancer, flexplate, starter, alternator, A/C compressor, front accessory drive system, spark plugs, wires, and more .

Is the SP383 EFI a good engine?

The SP383 EFI is widely regarded as one of the best value crate engines on the market. Its cast iron block with 4-bolt mains, forged steel crankshaft, Fast Burn aluminum heads, and self-learning EFI deliver reliable performance backed by Chevrolet Performance engineering and a 2-year warranty .

What fuel does the SP383 EFI require?

Premium pump fuel is recommended for optimal performance and drivability .

Does the SP383 EFI include an ECU?

Yes. The SP383 EFI includes a pre-programmed, self-learning engine controller and wiring harness .

What is the difference between 19433046 and 19435454?

19433046 has been discontinued and superseded by 19435454 . Both engines have identical specifications, but 19435454 is the current production part number.