- Engines & Components
- Engine - Assembled / Ready-to-Run
- Chevrolet Performance SP350/385 Base 350ci/385HP Crate Engine
The Foundation for a High-Revving 350 Small-Block!
The SP350/385 crate engine incorporates modern technologies such as a beehive-type valve springs to take the classic 350 Small-Block to new levels of high-rpm performance - without sacrificing the signature torque that has made it the benchmark of V-8 engines for nearly half a century.
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In fact, the 385 horsepower rating of the engine is complemented by excellent low-rpm torque, with the SP350/385 generating 405 lb.-ft. of torque at 3,600 rpm. It's all due to the high-flow, lightweight aluminum cylinder heads. They're based on the proven Fast Burn design, with large intake runners and 2.00/1.55-inch valves. The beehive valve springs enable greater high-rpm performance and durability, allowing the engine to rev higher to make the most of every cubic foot of air drawn through it.
As with all of Chevrolet Performance's Small-Block crate engines, the SP350/385 is built with a cast-iron block with four-bolt mains. It also features a forged steel crankshaft, an aggressive hydraulic roller camshaft and durable, high silicon pistons. In this value-driven ''Base'' crate engine package, it also includes the intake manifold, distributor, water pump, damper and flexplate.
SP350/385 BASE TECH SPECS:
- Engine Type: Chevy Small-Block V-8
- Displacement: 350ci
- Bore x Stroke: 4.000'' x 3.480''
- Block: Cast-iron with four-bolt main caps
- Crankshaft: Forged steel, 1-piece rear main seal
- Connecting Rods: Powdered metal
- Pistons: Hypereutectic aluminum
- Camshaft Type: Hydraulic roller
- Camshaft Lift: .474'' intake / .510'' exhaust
- Camshaft Duration (@.050 in.): 208° intake / 221° exhaust
- Cylinder Heads: 'Fast Burn' aluminum, 62cc combustion chambers
- Valve Size: 2.000'' intake / 1.550'' exhaust
- Compression Ratio: 9.6:1
- Rocker Arms: Stamped steel
- Rocker Arm Ratio: 1.5:1
- Distributor: HEI type
- Water Pump: Cast-iron, long-style
- Flexplate: 12.75'' diameter, 153-tooth
- Recommended Fuel: Premium pump
- Ignition Timing: 36° Total @ 4000 rpm
- Maximum Recommended RPM: 5800
- Balanced: External
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