Description
The Chevy LS1 engine is part of General Motors' Gen III small-block V8 engine family, known for its performance and versatility. Here are the detailed specifications for the LS1 engine:
### General Information:
- **Engine Type:** 5.7L V8
- **Engine Family:** Gen III small-block
- **Displacement:** 5.7 liters (346 cubic inches)
- **Block Material:** Aluminum
- **Cylinder Head Material:** Aluminum
- **Production Years:** 1997 to 2004
### Dimensions:
- **Bore:** 3.898 inches (99.0 mm)
- **Stroke:** 3.622 inches (92.0 mm)
- **Deck Height:** 9.240 inches (234.6 mm)
- **Rod Length:** 6.098 inches (154.9 mm)
### Performance:
- **Compression Ratio:** 10.1:1
- **Horsepower:** 305-350 hp (227-261 kW) depending on the model year and vehicle application
- **Torque:** 335-365 lb-ft (454-495 Nm)
### Fuel System:
- **Fuel Type:** Gasoline
- **Fuel Delivery:** Sequential fuel injection (SFI)
- **Fuel Injection Pressure:** 58 psi (400 kPa)
### Induction System:
- **Intake Manifold:** Composite, multi-piece
- **Throttle Body:** Drive-by-wire or cable-operated, depending on the model year
### Internal Components:
- **Crankshaft:** Nodular iron
- **Connecting Rods:** Powdered metal
- **Pistons:** Hypereutectic aluminum
- **Camshaft:** Hydraulic roller
- **Lifters:** Hydraulic roller
### Valvetrain:
- **Valvetrain Configuration:** Overhead valve (OHV)
- **Valves per Cylinder:** 2 (1 intake, 1 exhaust)
- **Valve Diameter:**
- **Intake:** 2.00 inches (50.8 mm)
- **Exhaust:** 1.55 inches (39.4 mm)
- **Rocker Arms:** Investment-cast, roller-type
### Ignition System:
- **Ignition Type:** Coil-near-plug
- **Firing Order:** 1-8-7-2-6-5-4-3
### Lubrication:
- **Oil Type:** SAE 5W-30
- **Oil Capacity:** 5.5 quarts (5.2 liters)
- **Oil System:** Wet sump
### Cooling System:
- **Cooling Type:** Water-cooled
- **Coolant Capacity:** 11.3 quarts (10.7 liters)
### Emissions:
- **Emissions Control:** EGR (exhaust gas recirculation), catalytic converters, and OBD-II
The LS1 engine was used in a variety of GM vehicles, including the Chevrolet Corvette (C5), Chevrolet Camaro, and Pontiac Firebird, among others. It is renowned for its reliability, performance potential, and the vast aftermarket support available for modifications and enhancements.