Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 engine DIY maintenance and service manual

General Information

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 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), and uses 7.9:1 compression. This engine was rated 230 hp (171.51 kW) at 3600 rpm and 385 lbf⋅ft (521.99 N⋅m) of torque at 1600 rpm. It was used in Chevrolet cars.

Engine Performance Rating

SAE J1349 (SAE Net)

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 engine performance rating according to SAE J1349 (SAE Net) standard.
Parameter	Output
Power Rating	230 hp (171.51 kW) at 3600 RPM
Torque Rating	521.99 N⋅m385 lbf⋅ft385 lbf⋅ft at 1600 RPM

Specifications

General

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 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
Compression Ratio	7.9:1

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Block, crankshaft and pistons

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 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) L19 engine head and valvetrain specifications.
Parameter	Value
Valvetrain Type	OHV
Valves per Cylinder	2

Air Intake

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 air intake specifications.
Parameter	Value
Air Intake Method	Naturally Aspirated

Fuel Injection

Chevrolet gasoline Big-block Mark IV 454 CID (7.4 L) L19 fuel injection specifications.
Parameter	Value
Injection Type	Multi Point