ATK HP101C 383 Stroker Crate Engine – 470 HP Small Block Chevy

The Ultimate 383 Stroker Crate Engine for Serious Street Performance

The ATK High Performance HP101C 383 stroker crate engine delivers race-proven, street-friendly performance in a complete long block package ready to transform your classic Chevy, hot rod, or custom build. As part of our extensive Small Block Chevy collection, this 383 cubic inch V8 produces an impressive 470 horsepower and 455 lb-ft of torque—making it one of the most formidable stroker engines in ATK’s high-performance lineup. Whether you’re building a weekend warrior, a street machine, or a track-day monster, this ATK 383 stroker crate engine delivers the power and reliability that Chevy enthusiasts demand.

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What Makes the ATK 383 Stroker the Ultimate SBC Crate Engine?

The HP101C is engineered for enthusiasts who demand maximum performance without sacrificing drivability. ATK High Performance, a division of ATK North America, has been a leader in the performance engine industry for decades, combining over 40 years of remanufacturing expertise with cutting-edge technology . Each ATK engine is dynamometer tested and run-in before shipment to ensure optimal performance and reliability . Every engine comes with its own dyno sheet so you can see exactly how much power your engine produced before it left the facility .

383 Stroker Horsepower and Torque Figures

This 383 stroker crate engine produces staggering output that puts most performance engines to shame:

• 470 horsepower at 5,600 RPM

• 455 lb-ft torque at 4,300 RPM

• 9.8:1 compression ratio – pump gas friendly

• Hydraulic roller cam – low maintenance, excellent durability

• 6,500 RPM maximum recommended engine speed

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Complete 383 Stroker Engine Specifications

Engine Block and Rotating Assembly

The foundation of this ATK 383 stroker is a seasoned 4-bolt main block, machined and built to exacting standards . Key block features include:

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

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

• 4.030-inch bore x 3.750-inch stroke

• Internal engine balance

• Cast steel 3.75-inch stroke crankshaft

• High-performance 5.700-inch connecting rods with ARP bolts

• Hypereutectic pistons

• Moly piston rings for superior sealing

ATK Aluminum Cylinder Heads

The HP101C is topped with ATK’s high-performance aluminum cylinder heads, featuring:

• 64cc combustion chambers

• 2.02-inch intake valves

• 1.60-inch exhaust valves

• 195cc intake runners

• 65cc exhaust runners

• 1.5:1 ratio rocker arms

Hydraulic Roller Camshaft Specifications

What’s Included with Your ATK HP101C Crate Engine

The HP101C comes as a complete long block assembly with the following components included :

Important Note: This is a long block assembly. The following components are not included and must be sourced separately :

• Intake manifold

• Carburetor or fuel injection system

• Distributor and ignition system

• Water pump

• Spark plugs and wires

• Starter

• Front accessory drive components

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ATK Engine Building Excellence

The ATK Difference

ATK High Performance distinguishes itself through an unwavering commitment to quality and testing. Each engine is individually assembled in the USA by master engine builders with decades of experience . Every engine undergoes:

• Complete disassembly and inspection of all components

• CNC honing and surfacing for precision fitment

• Blueprinted assembly to exacting tolerances

• Dynamometer testing and run-in before shipment

• Comprehensive leak and pressure testing

Quality Control Standards

ATK’s quality control process ensures that every HP101C meets the highest standards of performance and reliability :

• Cylinders honed to within .0002″ straightness and roundness

• Main bearing bore align-honed for precision

• Square and parallel deck surfaces

• All engines hot-tested and run-in before shipment

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383 Stroker Engine Installation Notes

Important Considerations Before Installation

Before installing your ATK HP101C crate engine, review these critical notes :

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

• 91-93 octane pump gas recommended

• 32-36° total timing at 3,500 RPM recommended

• Initial timing 10-14° at idle

• Firing order: 1, 8, 4, 3, 6, 5, 7, 2

• Oil capacity: 5 quarts with filter

Emissions and Warranty Information

Emissions Compliance: This engine is intended for off-road and competition use only. Verify emissions compliance for your specific application and jurisdiction.

Warranty: ATK High Performance backs the HP101C with a comprehensive 3-year / unlimited mileage warranty .

Break-In Recommendations

ATK recommends :

• Use break-in oil with zinc additive for the first 500 miles

• Avoid hard acceleration for sustained periods

• Periodically change engine speed while driving to help seat rings

• Monitor oil pressure and coolant temperature closely

• Change oil and filter after break-in period

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ATK 383 vs Competitor 383 Options

Within our Small Block Chevy category, the ATK HP101C stands out for several reasons:

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383 Stroker Engine Swap – Compatibility and Considerations

The ATK HP101C is a drop-in replacement for any vehicle originally equipped with a small-block Chevy. Compatible applications include :

• Chevrolet Camaro, Nova, Chevelle, Malibu, El Camino

• Chevrolet Corvette

• Chevrolet and GMC trucks

• Street rods and custom builds

• Classic cars requiring a 1-piece rear main seal configuration

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Why Choose NH Race Engine for Your SBC Crate Engine?

As a Netherlands-based specialist serving performance enthusiasts across Europe, NH Race Engine brings unmatched expertise to your small-block Chevy project. We understand the unique requirements of European builds—from shipping logistics to regional considerations. Browse our Small Block Chevy collection and other crate engine offerings to find the perfect solution for your build.

Contact NH Race Engine today to discuss your ATK 383 stroker engine requirements. Our expert team can help you navigate compatibility, shipping, and installation considerations for your European build.