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CHEVROLET SP350/357 (Turnkey)

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An affordable small-block performer!

c357 hp @ 5,500 rpm | 407 lb.-ft. @ 4,000 rpm

With 357 horsepower and more than 400 lb.-ft. of torque, the Chevrolet Performance 350/357 Turn-Key offers a great combination of performance and value.

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SP350/357 Turnkey

357 hp @ 5,500 rpm | 407 lb.-ft. @ 4,000 rpm
REQUIRES FUEL SUPPLY LINE TO CARBURETOR

The next 350 evolution — high torque and horsepower from modern valve-train technology

CHEVROLET SP350/357 Turnkey Engine

An affordable small-block performer!

With 357 horsepower and more than 400 lb.-ft. of torque, the Chevrolet Performance 350/357 Turn-Key offers a great combination of performance and value.

Modern valvetrain technology is the key to its high-revving capability, pushing power to 5,500 rpm, while economical iron cylinder heads deliver excellent airflow and help make this potent crate engine more affordable. They’re matched with a friction-reducing roller camshaft that helps optimize performance across the rpm band.

The rest of 350/357 Turn-Key is built with strong, all-new components, including a brand-new four-bolt block, a durable nodular iron crankshaft and more. The Turn-Key Engine comes with the intake manifold and distributor installed. It also includes the carburetor, front-end accessory kit, chrome air cleaner, starter, and spark plug wires (some installation required).

INSTALLATION NOTES: Requires fuel supply line to carburetor

Performance

Horsepower: 357 hp @ 5,500 rpm
Torque: 407 lb.-ft @ 4,000 rpm
Max Rec RPM: 5,600 rpm

Engine Basics

Part Number: 19433034
Engine Type: Chevy Small-Block V-8
Displacement: 350 cu. in. (5.7L)
Block (P/N 19431835): Cast iron with 4-bolt main caps
Balanced: External

Measurements

Bore x Stroke: 4.000 in. x 3.480 in
Valve Lift (in): 0.473 intake / 0.473 exhaust
Camshaft Duration (@ .050 in): 215° intake / 223° exhaust
Compression Ratio: 9.0:1 nominal
Rocker Arm Ratio: 1.5:1

Internal Components

Crankshaft: Forged steel
Connecting Rods: Forged powder metal, shot peened
Pistons: Cast aluminum
Intake Manifold: Dual-plane aluminum
Camshaft Type: Hydraulic roller
Rocker Arms: Stamped steel

Cylinder Head and Valves

Cylinder Heads: Cast iron; as cast with 62cc chambers
Valve Size (in): 1.940 intake / 1.500 exhaust

Fuel and Ignition

Flexplate (P/N 14088765): 12.750”
Ignition Timing: 32° total @ 4,000 rpm
Recommended Fuel: Premium pump

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