Chevrolet gasoline Big-block Mark IV 427 CID (7.0 L) L36 390 hp
Chevrolet gasoline Big-block Mark IV 427 CID (7.0 L) L36 390 hp is an 427 in³ (7 L) internal combustion reciprocating V8 engine. It has bore/stroke ratio of 4.25 in × 3.76 in (10.8 cm × 9.55 cm), and uses 10.25:1 compression. This engine was rated 390 hp (290.82 kW) at 5400 rpm and 460 lbf⋅ft (623.68 N⋅m) of torque at 3600 rpm. It was used in Chevrolet cars.
Produced from 1967 to 68, had Holley or Q-jet carburetor, nodular iron crankshaft, hydraulic lifters, oval port closed chamber heads, and two-bolt main caps.
| Parameter | Output |
|---|---|
| Power Rating | 390 hp (290.82 kW) at 5400 RPM |
| Torque Rating | 460 lbf⋅ft at 3600 RPM |
| Parameter | Value |
|---|---|
| Type | Internal Combustion Reciprocating |
| Fuel Type | Gasoline |
| Cylinder Configuration | V8 |
| Engine Displacement | 427 in³ |
| Bore | 4.25 in |
| Stroke | 3.76 in |
| Compression Ratio | 10.25:1 |
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| Parameter | Value |
|---|---|
| Block Material | Cast Iron |
| Parameter | Value |
|---|---|
| Valvetrain Type | OHV |
| Valves per Cylinder | 2 |
| Parameter | Value |
|---|---|
| Injection Type | Carburetor |
| Parameter | Value |
|---|---|
| Intake Opens | 44° B.T.D.C. |
| Intake Closes | 92° A.B.D.C. |
| Intake Duration | 316° |
| Exhaust Opens | 86° B.B.D.C. |
| Exhaust Closes | 36° A.T.D.C. |
| Exhaust Duration | 302° |
| Valves Overlap | 258° |
