Product Description
The ATK HP94C Chevrolet 383ci Stroker Fully Dressed Crate Engine is a high-performance small-block V8 engineered for classic Chevrolet enthusiasts, automotive restoration specialists, professional engine builders, and custom vehicle projects requiring powerful naturally aspirated performance.
Delivering 415 horsepower and 460 lb-ft of torque, this premium crate engine combines the legendary Chevrolet small-block architecture with increased 383 cubic-inch displacement for substantial power and torque.
The HP94C features a carefully selected combination of premium performance components, including a SCAT nodular iron crankshaft, SCAT I-beam connecting rods, hypereutectic pistons, hydraulic roller camshaft, aluminum cylinder heads, and billet aluminum roller rocker arms.
Its 383ci stroker configuration uses a 4.040-inch bore and 3.750-inch stroke to provide additional displacement compared with a conventional Chevrolet 350ci engine.
This additional displacement helps deliver strong torque characteristics, making the HP94C an attractive engine option for compatible muscle cars, classic Chevrolet restorations, performance vehicles, and custom automotive builds.
The ATK high-performance aluminum cylinder heads feature 2.020-inch intake valves and 1.600-inch exhaust valves, supporting efficient airflow through the engine.
A hydraulic roller camshaft with performance-oriented valve timing contributes to the engine’s power delivery while working with the included roller rocker configuration.
The fully dressed engine package includes major components such as the intake manifold, carburetor, distributor, valve covers, timing cover, water pump, harmonic balancer, flexplate, spark plugs, and ignition wires.
These included components make the HP94C a convenient solution for customers seeking an assembled performance engine rather than purchasing every major engine component separately.
The ATK HP94C 383 Stroker Crate Engine provides an excellent combination of American V8 performance, proven Chevrolet engine architecture, quality internal components, and a comprehensive engine package.
Key Features
415 Horsepower Performance
Delivers an advertised 415HP, providing powerful naturally aspirated performance for compatible Chevrolet V8 applications.
460 lb-ft of Torque
Produces 460 lb-ft of torque, offering substantial performance for compatible automotive projects.
Chevrolet 383ci Stroker Architecture
Features increased engine displacement through a 4.040-inch bore and 3.750-inch stroke configuration.
High-Performance Aluminum Cylinder Heads
Equipped with aluminum cylinder heads featuring large performance intake and exhaust valves.
Hydraulic Roller Camshaft
Includes a performance hydraulic roller camshaft designed for the engine’s high-output configuration.
SCAT Performance Crankshaft
Features a SCAT nodular iron crankshaft with a mixed internal/external balancing arrangement.
SCAT I-Beam Connecting Rods
Uses 5.7-inch SCAT I-beam connecting rods with ARP 8740 bolts.
9.7:1 Compression Ratio
Combines hypereutectic pistons with a 9.7:1 compression ratio.
Fully Dressed Engine Package
Includes major intake, ignition, cooling, and engine-mounted components.
Four-Bolt Main Engine Block
Built using a Chevrolet OE roller block with four-bolt main construction and a one-piece rear main seal.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | ATK High Performance |
| Model | HP94C |
| Engine Family | Chevrolet Small Block V8 |
| Product Category | Fully Dressed Crate Engine |
| SKU | ATK-HP94C-383V8-1851 |
| Displacement | 383ci |
| Engine Configuration | V8 |
| Horsepower | 415 HP |
| Torque | 460 lb-ft |
| Block | 1996–2000 OE Roller Block |
| Main Bearing Configuration | 4-Bolt Main |
| Rear Main Seal | One-Piece |
| Bore | 4.040 Inches |
| Stroke | 3.750 Inches |
| Compression Ratio | 9.7:1 |
| Crankshaft | SCAT Nodular Iron |
| Connecting Rods | SCAT I-Beam, 5.7 Inches |
| Rod Bolts | ARP 8740 |
| Pistons | Hypereutectic |
| Piston Rings | Moly |
| Camshaft | Hydraulic Roller |
| Cam Duration @ .050 | 220° Intake / 224° Exhaust |
| Camshaft Lift | .528″ Intake / .536″ Exhaust |
| Lobe Separation Angle | 110° |
| Timing Chain | Double Roller |
| Cylinder Head Material | Aluminum |
| Cylinder Head Chamber | 64cc |
| Intake Runner Volume | 195cc |
| Intake Valve Size | 2.020 Inches |
| Exhaust Valve Size | 1.600 Inches |
| Rocker Arms | Billet Aluminum Roller |
| Rocker Ratio | 1.6:1 |
| Oil Pan | Rear Sump, 5 Quart |
| Oil Pump | Melling Standard Volume |
| Intake Manifold | ATK Dual Plane |
| Distributor | HEI |
| Carburetor | Quick Fuel Four-Barrel |
| Carburetor Capacity | Approximately 670–680 CFM, depending on supplied configuration |
| Recommended Fuel | 91+ Octane |
| Condition | Brand New |
| Warranty | 2-Year Limited Manufacturer Warranty |
Engine Block / Internal Configuration
| Component | Details |
|---|---|
| Engine Architecture | Chevrolet Small Block V8 |
| Displacement | 383ci |
| Engine Block | Four-Bolt Main OE Roller Block |
| Rear Main Seal | One-Piece |
| Bore × Stroke | 4.040″ × 3.750″ |
| Crankshaft | SCAT Nodular Iron |
| Connecting Rods | SCAT 5.7″ I-Beam |
| Connecting Rod Bolts | ARP 8740 |
| Pistons | Hypereutectic |
| Piston Rings | Moly |
| Compression Ratio | 9.7:1 |
| Timing Chain | Double Roller |
Cylinder Head / Valvetrain Configuration
| Component | Details |
|---|---|
| Cylinder Heads | ATK High-Performance Aluminum |
| Combustion Chamber | 64cc |
| Intake Runner | 195cc |
| Intake Valve Diameter | 2.020 Inches |
| Exhaust Valve Diameter | 1.600 Inches |
| Camshaft Type | Hydraulic Roller |
| Intake Duration @ .050 | 220° |
| Exhaust Duration @ .050 | 224° |
| Intake Cam Lift | .528 Inches |
| Exhaust Cam Lift | .536 Inches |
| Lobe Separation | 110° |
| Rocker Arms | Billet Aluminum Roller |
| Rocker Ratio | 1.6:1 |
The advanced valvetrain configuration supports the engine’s advertised horsepower and torque output while maintaining the proven design of the Chevrolet small-block V8.
Fuel / Intake Configuration
| Component | Details |
|---|---|
| Fuel System | Carbureted |
| Carburetor | Quick Fuel Four-Barrel |
| Carburetor Capacity | Approximately 670–680 CFM |
| Secondary Operation | Vacuum Secondary |
| Choke | Electric |
| Intake Manifold | ATK Dual Plane |
| Fuel Pump | Mechanical |
| Recommended Fuel | Premium Gasoline, 91+ Octane |
Ignition / Electrical Configuration
| Component | Details |
|---|---|
| Ignition Type | HEI |
| Distributor | HEI Distributor with Iron Gear |
| Spark Plugs | Autolite 3923 |
| Spark Plug Wires | 8 mm |
| Engine Management | Carbureted Ignition Configuration |
| ECU Included | No |
| Wiring Harness Included | No |
Cooling / Lubrication Configuration
| Component | Details |
|---|---|
| Water Pump | OE Long Water Pump |
| Oil Pan | Rear Sump |
| Oil Capacity | 5 Quarts |
| Oil Pump | Melling Standard Volume |
| Recommended Break-In Oil | Conventional 10W-30 |
| Timing Cover | Included |
| Harmonic Balancer | Included |
Engine Balance / Drivetrain Configuration
| Component | Details |
|---|---|
| Crankshaft Balance | Internal Front / External Rear |
| Harmonic Balancer | Internally Balanced Configuration |
| Flexplate | Externally Balanced Configuration |
| Flywheel | Not Included |
| Rear Main Seal | One-Piece |
| Transmission Compatibility | Application-Specific |
What’s Included
| Included Component | Details |
|---|---|
| ATK HP94C 383ci Crate Engine | 1 Complete Engine |
| Engine Block & Internal Assembly | Included |
| SCAT Crankshaft | Installed |
| SCAT Connecting Rods | Installed |
| Hypereutectic Pistons | Installed |
| Aluminum Cylinder Heads | Installed |
| Hydraulic Roller Camshaft | Installed |
| Roller Rocker Arms | Installed |
| ATK Dual-Plane Intake Manifold | Included |
| Quick Fuel Carburetor | Included |
| HEI Distributor | Included |
| Mechanical Fuel Pump | Included |
| Engine Valve Covers | Included |
| Timing Cover | Included |
| Water Pump | Included |
| Harmonic Balancer | Included |
| Flexplate | Included |
| Oil Pan | Included |
| Spark Plugs | Included |
| Spark Plug Wires | Included |
| Flywheel | Not Included |
| Air Cleaner | Not Included |
| Manufacturer Documentation | As Supplied |
Vehicle / Installation Compatibility
The ATK HP94C 383ci Stroker Engine is intended for compatible Chevrolet small-block V8 applications.
| Vehicle Application | Compatibility Considerations |
|---|---|
| Classic Chevrolet Cars | Engine Mounting and Drivetrain Compatibility |
| Chevrolet Muscle Cars | Transmission and Engine-Bay Clearance |
| Classic Chevrolet Trucks | Cooling, Mounting and Exhaust Requirements |
| Custom Performance Vehicles | Chassis and Drivetrain Requirements |
| Restoration Projects | Vehicle-Specific Installation Compatibility |
| Automotive Performance Builds | Supporting Components and Legal Requirements |
The rear-sump oil pan may not fit certain Chevrolet applications, including some Chevelles, Corvettes, and 1962–1967 Chevy II vehicles.
Ideal Applications
Classic Chevrolet Restoration: Suitable for compatible vintage Chevrolet vehicles requiring a performance-oriented small-block V8 engine.
Muscle-Car Projects: Ideal for appropriate American muscle-car applications where powerful naturally aspirated V8 performance is desired.
Custom Automotive Builds: A complete engine foundation for professionally planned performance vehicle projects.
Classic Truck Projects: Suitable for compatible classic Chevrolet trucks with appropriate drivetrain and installation components.
Professional Engine Replacement: Useful for performance workshops and automotive restoration businesses.
Product Advantages
The ATK HP94C provides an attractive combination of increased 383ci displacement, 415HP, 460 lb-ft of torque, high-performance aluminum cylinder heads, premium SCAT rotating components, and a comprehensive fully dressed engine package.
Its Chevrolet small-block architecture offers a familiar foundation for compatible classic automotive projects, while the performance components support the increased output of the stroker configuration.
Safety & Installation Notice
Installation should be performed by qualified automotive professionals following the manufacturer’s specifications.
Vehicle compatibility, drivetrain requirements, engine mounting, fuel system, cooling, exhaust clearance, and emissions regulations should be verified before purchase. This performance engine should not be assumed legal for emissions-controlled street vehicles.
Warranty Information
2-Year Limited Manufacturer Warranty
Warranty coverage is subject to ATK’s official warranty terms, including eligibility requirements, installation conditions, maintenance obligations, and exclusions.
Product Highlights
ATK HP94C High-Performance Crate Engine Chevrolet 383ci Stroker V8 415 Horsepower 460 lb-ft Torque SCAT Nodular Iron Crankshaft SCAT I-Beam Connecting Rods 9.7:1 Compression Ratio High-Performance Aluminum Cylinder Heads Hydraulic Roller Camshaft Fully Dressed Engine Package Quick Fuel Four-Barrel Carburetor ATK Dual-Plane Intake Manifold 2-Year Limited Manufacturer Warranty
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