Power: 435 HP @ 5600 RPM, 445 ft. lbs. of torque @ 4600 RPM
Displacement: 383 CID
Bore x Stroke: 4.000” x 3.800”
Compression Ratio: 9.6:1
Recommended Fuel: 92 Octane
Block: Cast Iron, 1 piece rear seal, 4-bolt main caps
Crankshaft: 4340 Forged Steel
Connecting Rods: HD Powdered Metal Steel
Pistons: Hypereutectic Aluminum
Camshaft: Steel Hydraulic Roller Tappet
Cam Lift: .509” Intake / .528” exhaust
Cam Duration @ .050”: 222 deg. Intake / 230 deg. Exhaust
Lobe Separation: 112 Degree
Cylinder Heads: GM Fast Burn Aluminum Dual Bolt Pattern, 3/8” screw-in rocker studs
Combustion Chamber: 62cc
Valves: .200” Intake/ 1.55” Exhaust
Rocker Arms: Aluminum Roller, 1.5:1 Ratio
Valve Springs: 12625033 Beehive Style
Maximum GM Recommended RPM: 6000
Chevrolet Performance recommended converter stall 3000-3400
Ignition Timing: Base 10 degrees BTDC, 36 degrees total @ 4000RPM
GM Licensed Black Aluminum Valve Covers
GM Eliminator Single Plane Vortec Intake Manifold
12-3/4” Auto Trans Flexplate
8” Harmonic Balancer
Cast Iron Long Water Pump
Oil Filter Adapter
Passenger Side RH Oil Dipstick and Tube
Chevrolet Performance’s Latest Twist on the Big-Torque 383 Stroker!
When it comes to cranking serious torque from the classic Small-Block, it’s hard to beat the 383 stroker combination, which uses a long, 3.800-inch stroke with 4.000-inch bores to generate exceptional low-end pulling power and surprising high-rpm horsepower.
Chevrolet Performance’s stroker crate engine is part of our range of Street Performance engines and is designed for optimal performance on the street and the occasional trip down the quarter-mile. It features lightweight aluminum cylinder heads based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. Beehive-style valve springs enable great high-rpm performance and durability, allowing the SP383 to rev higher and build more horsepower. The result is 435 exhilarating horsepower and 445 lb.-ft. of seat-tugging torque.
Like all of our crate engines, it is built with a cast-iron block with four-bolt mains. It also features a forged steel crankshaft, an aggressive hydraulic roller camshaft and a high-flow, aluminum intake manifold.