Chevrolet Performance's COPO crate engines are engineered for NHRA's Stock Eliminator and Super Stock classes, offering sportman racers a range of factory-developed-and-assembled racing engines.
The 350, 396 and 427 naturally aspirated engines make a race car eligible for NHRA Stock Eliminator classes from AA/S to D/S, based primarily on weight and horsepower ratings. The 350 S/C engine makes cars eligible for AAA/S and AA/S classes. Consult the NHRA rule book at nhra.com for class and compliance guidelines.
Chevrolet Performance engineers designed and tested the engines with the same methods used to develop production engines, ensuring their performance and durability; and each engine is hand-assembled in a specially built facility.
COPO 327 4.0L S/C - 550 hp
The most powerful supercharged COPO crate engine is designed for NHRA’s A Super Stock class and uses a large, 4.0L compressor to generate tremendous horsepower. Its foundation is the sturdy LSX cylinder block, with a tough, all-forged rotating assembly and the big-displacement Whipple blower. Like the other COPO crate engines, this one uses the high-flow LSX-LS7 6-bolt heads to move as much air as possible.
Displacement: 327 cu in (5.3L)
Compression Ratio: 10.2:1
Cylinder Block: LSX cast iron
Bore x Stroke (in): 4.065 x 3.150
Crankshaft: Forged steel
Connecting Rods: Forged steel
Pistons: Forged dome
Cylinder Heads: LSX-LS7 aluminum
Supercharger: 4.0L Whipple
Camshaft Type: Hydraulic roller
Camshaft Lift (int./exh.): .640/.640-inch
Camshaft Duration (int./exh.) 244/255 deg. @. 050-inch