Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine DIY maintenance and service manual

General Information

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 is an 454 in³ (7.44 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 4.25 in × 4 in (10.8 cm × 10.16 cm). This engine was rated 465 hp (346.75 kW) and 612 lbf⋅ft (829.76 N⋅m) of torque. It was used in Chevrolet cars.

Engine Performance Rating

SAE J1349 (SAE Net)

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	465 hp (346.75 kW)
Torque Rating	829.76 N⋅m612 lbf⋅ft612 lbf⋅ft

Specifications

General

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine general specifications.
Parameter	Value
Type	Internal Combustion Reciprocating
Fuel Type	Gasoline
Cylinder Configuration	V8
Engine Displacement	7.44 L454 in³454 in³
Bore	10.8 cm4.25 in4.25 in
Stroke	10.16 cm4 in4 in

Photos

Please help our community. Upload your photos of Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine.

Block, crankshaft and pistons

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine block, crankshaft and pistons specifications.
Parameter	Value
Block Material	Cast Iron

Engine head and valvetrain

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 engine head and valvetrain specifications.
Parameter	Value
Head Material	Cast Iron
Valvetrain Type	OHV
Valves per Cylinder	2

Air Intake

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 air intake specifications.
Parameter	Value
Air Intake Method	Naturally Aspirated

Fuel Injection

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) LS7 fuel injection specifications.
Parameter	Value
Injection Type	Carburetor