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- 2014-2015 427ci COPO Crate Engine
- NHRA Rated At 425 HP
- Equipped with a lighter, custom aluminum oil pan and a 90mm throttle body.
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.
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Factory Engineered Drag Race Performance!
The power behind Chevrolet's winning COPO Camaro program is the factory-engineered racing engines tailored for NHRA's Stock and Super Stock classes. Those engines are now available from Chevrolet Performance for racers to use in homebuilt COPO Camaros and other race cars. The COPO crate engines include a naturally aspirated 427 engine (7.0L) - the same displacement as the original COPO Camaros from 1969 - and two supercharged 327 (5.3L) engines - one using an LSX iron block with a 2.9L supercharger and the other using an LSX iron block and 4.0L supercharger.
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Both of the supercharged engines use Whipple twin-screw blowers. The engines are built to specifications to make them eligible for competition in Stock and Super Stock. Chevrolet Performance engineers designed and tested the engines with the same methods used to develop our production and race engines, ensuring their performance and durability. The COPO 427 for ''A'' Stock competition uses the large-bore cylinder block and high-flow cylinder heads of the LS7 engine and complements them with a high-compression rotating assembly to deliver big power from its large displacement. Its lightweight aluminum block and heads revive the spirit of the original ZL1 all-aluminum 427 big-block that helped forge the COPO legacy in 1969.
2012-2015 COPO 427ci/425hp TECH SPECS:
- Displacement: 427ci (7.0L)
- Bore x Stroke: 4.125'' x 4.000''
- Block: LS7 Cast Aluminum
- Crankshaft: Forged Steel
- Connecting Rods: Forged Steel
- Pistons: Forged Aluminum Dome
- Camshaft Type: Hydraulic Roller
- Camshaft Lift: .630'' intake / .630'' exhaust
- Camshaft Duration (@.050 in.): 233° intake / 276° exhaust
- Cylinder Heads: Aluminum LS7
- Valve Size: Titanium 2.205'' Intake / Sodium-filled 1.615'' Exhaust
- Compression Ratio: 13.5:1
- Rocker Arms: Pedestal Mount Cast Iron, Roller Trunnion
- Rocker Arm Ratio: 1.8:1
- Induction: Natural, Throttle Body with Holley Hi-Ram Intake Manifold
