
396ci COPO Long Block Replacement Long Block Engine For Factory COPO 396ci
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- 396ci COPO Long Block
- Replacement Long Block Engine For Factory COPO 396ci
Engine Break-In Procedure
Use only engine oil that meets dexos1 specifications. For track events or competitive driving, use Mobil 1 15W-50 engine oil. Fill the engine with oil and follow the proper engine priming procedure. Also check and fill as required any other necessary fluids such as coolant, power steering fluid, etc.
Start the engine and listen for any unusual noises. If no unusual noises are noted, run the engine at approximately 1000 RPM until normal operating temperature is reached. The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle (WOT) or sustained high RPM accelerations. Run five or six medium throttle (50%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear. Run two or three hard throttle (WOT 100%) accelerations to about 4000 RPM and back to idle (0% throttle) in gear.
Change the engine oil and filter. Inspect the oil and the oil filter for any foreign particles to ensure that the engine is functioning properly. Drive the next 500 miles (12 to 15 engine hours) under normal conditions. Do not run the engine at its maximum rated engine speed. Also, do not expose the engine to extended periods of high load. Change the oil and filter again, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning properly.
Chevrolet Performance's COPO crate engines are engineered for NHRA's Stock Eliminator and Super Stock classes, offering sportsman racers a range of factory-developed-and-assembled racing engines. This 396ci COPO crate engine offers the displacement of a classic Chevrolet Big-Block, but with the new age lightweight of all-aluminum. Providing power reminiscent of vintage muscle cars, this crate engine gives modern high-rpm capability and vehicle balance dynamics that only an LS engine can deliver. The all-forged rotating assembly makes it a durable performer, suitable for racing applications. Chevrolet Performance engineers design and test all crate engines with the same methods used to develop production engines, ensuring their performance and durability. Each engine is hand-assembled in a specialty build facility.
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Note: This 396ci naturally aspirated crate engine makes a race car eligible for NHRA Stock Eliminator classes from AA/S to D/S, based primarily on curb weight and horsepower ratings. Consult the NHRA rule book for class and compliance guidelines.
Specifications:
- NHRA Rated at 390 HP
- Displacement: 396ci (6.5L)
- Compression Ratio: 10.5:1
- Cylinder Block: LS3 cast-aluminum
- Bore x Stroke: 4.065" x 3.825"
- Crankshaft: Forged steel
- Connecting Rods: Forged steel
- Pistons: Forged flat top
- Cylinder Heads: LS3 aluminum
- Induction: Natural
- Intake Manifold: Holley Hi-Ram
- Camshaft Type: Hydraulic roller
- Camshaft Lift: .595" intake / .595" exhaust
- Camshaft Duration: 233 intake / 276 exhaust deg. @ .050"
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