CHEVROLET HT383 Stroker

HT383 Stroker

Serious pulling power for the non-stock truck rebuild.

Upgrade your small-block’s torque!

323 hp @ 4,200 rpm | 444 lb.-ft. @ 3,000 rpm

Ready for a replacement? Forget the rebuild and take your vehicle’s capability to the next level with our big-torque HT383 crate engine. Its extra displacement and unique parts are designed to deliver a wide, flat torque curve that maintains at least 400 lb.-ft. between 2,500 and 4,000 rpm, with peak torque of 444 lb.-ft.!

That’s serious pulling power—and power that won’t come with a stock-type rebuild. The HT383 features a brand-new engine block with four-bolt mains (a strength-enhancing upgrade for most production engines, which came with two-bolt mains) along with a forged steel crankshaft (which includes a 4X crankshaft position sensor), and more. We deliver the HT383 with an aluminum intake manifold, ready for you to swap over the accessories from your tired engine. It’s also backed by a 24-month/50,000-mile (80,000 km) limited warranty.

INSTALLATION NOTES: Requires Carburetor, Fuel Pump, Ignition System and Starter.

Tech Specs

Performance Horsepower: 323 hp @ 4,200 rpm
Torque: 444 lb.-ft. @ 3,000 rpm
Max Rec RPM: 5,000

Engine Basics

Part Number: 19433036
Engine Type: Chevy Small-Block V-8
Displacement: 383 cu. in. (6.3L)
Block: Cast iron with 4-bolt main caps
Balanced: External

Measurements

Bore x Stroke: 4.005 in. x 3.800 in.
Valve Lift (in): .431 intake / .451 exhaust
Camshaft Duration (@.050 in): 196° intake / 206° exhaust
Compression Ratio: 9.1:1
Rocker Arm Ratio: 1.5:1

Internal Components

Crankshaft: 4340 forged steel; includes 4X crankshaft position sensor
Connecting Rods: Heavy-duty forged steel
Pistons: Hypereutectic aluminum
Intake Manifold: Dual plane aluminum
Camshaft Type: Hydraulic roller
Rocker Arms: Stamped steel

Cylinder Head and Valves

Cylinder Heads: Vortec iron; 62cc chambers
Valve Size (in.): 1.940 intake / 1.500 exhaust
Water Pump: Cast iron

Fuel and Ignition

Ignition Timing: 32° Total @ 4,000 rpm
Flexplate: 12.750”
Recommended Fuel: Regular pump