Types of LS3 Crate Engines
The LS3 crate engine is available in various configurations to suit different performance needs and applications. Each version offers unique features and power outputs designed for specific uses from daily drivers to high-performance race cars.
Power Output: 430 HP | 6.2L V8
This standard performance model features aluminum cylinder heads and an optimized intake manifold for improved airflow. The lightweight aluminum construction reduces overall weight while maintaining structural integrity.
Best for: Racing cars, sports cars, and performance builds requiring reliable power.
Power Output: 480 HP | 6.2L V8
Features an enhanced camshaft design that significantly improves intake and exhaust stroke efficiency. This upgraded design delivers 50 additional horsepower over the standard model without sacrificing reliability.
Best for: High-performance vehicles and competitive racing applications.
Power Output: 600+ HP | 6.2L V8 Supercharged
This supercharged variant forces additional air into the combustion chamber, dramatically increasing power output. The forced induction system creates substantial performance gains for ultimate acceleration.
Best for: Supercars and professional racing applications requiring maximum power.
Power Output: 430 HP | 6.2L V8 with Air Scoop
Similar to the 19417771 model but includes a Chevrolet Performance intake air scoop that enhances cool air delivery to the engine. This addition improves throttle response and can increase real-world horsepower in certain conditions.
Best for: Performance builds where throttle response and consistent power delivery are priorities.
While not a standalone engine, this controller kit is essential for aftermarket LS3 installations. Includes a controller module, wiring harness, and engine calibration software for managing critical engine parameters.
Features: Controls fuel injection, ignition timing, and variable valve timing
Best for: Custom builds and engine swaps requiring electronic management.
Expert Tip: When selecting between LS3 variants, consider not just peak horsepower but also torque curve characteristics that match your driving style. The 19417770 model's camshaft delivers excellent mid-range torque that's ideal for street performance, while the supercharged 19417773 excels in high-end power delivery better suited for track applications.
LS3 Crate Engine Specifications
Understanding the technical specifications of the LS3 crate engine is essential for determining compatibility and performance potential in your application.
| Specification | Details | Performance Impact |
|---|---|---|
| Displacement | 6.2 liters (376 cubic inches) | Larger displacement allows for greater air/fuel mixture volume, directly contributing to power output |
| Cylinder Configuration | V8 (two rows of four cylinders in V-shape) | Provides optimal balance between compact design and power production |
| Power Output | 430 HP @ 5900 RPM (standard) | Excellent power-to-weight ratio suitable for high-performance applications |
| Torque Rating | 425 lb-ft @ 4600 RPM (standard) | Strong mid-range torque delivery ideal for acceleration and towing |
| Compression Ratio | 10.7:1 | Balanced ratio allowing for premium pump gas without detonation issues |
| Block Material | Cast Aluminum | Reduces weight while maintaining structural integrity |
| Valvetrain | Overhead Valve (OHV) with pushrods | Simple, reliable design that maintains lower center of gravity |
Key Technical Systems
The LS3 utilizes direct fuel injection technology that precisely delivers fuel directly into the combustion chamber. This system optimizes atomization for better combustion efficiency, improved power output, and reduced emissions compared to traditional port injection.
Features an advanced coil-on-plug design that eliminates the distributor and spark plug wires. This individual coil per cylinder arrangement provides more precise ignition timing control and stronger, more consistent spark energy across all RPM ranges.
The liquid cooling system incorporates precise coolant flow paths through the block and heads to maintain optimal operating temperatures. The aluminum construction aids heat dissipation, while the thermostat control ensures quick warm-up and consistent temperature regulation.
Employs a high-volume oil pump with optimized pressure relief to ensure adequate lubrication at all engine speeds. The system includes priority main oil galleries and piston cooling jets for enhanced durability during high-performance operation.
Important Note: While the LS3 crate engine is designed to be compatible with many GM vehicle platforms, additional components such as engine mounts, exhaust headers, and accessory drives may be required for specific applications. Always verify compatibility with your particular chassis before purchase.
LS3 Crate Engine Maintenance
Proper maintenance is crucial for maximizing the performance and longevity of your LS3 crate engine. Following a regular maintenance schedule helps prevent issues before they become serious problems.
Essential Maintenance Procedures
Regular Oil Changes
Change the oil every 3,000-5,000 miles using high-quality synthetic oil with a viscosity rating of 5W-30 or as specified in your application. The LS3's aluminum block and high-performance nature benefit significantly from premium lubricants that maintain their protective properties under high temperatures and RPMs.
Pro Tip: Always replace the oil filter with each oil change and inspect the old filter for metal particles that could indicate internal wear.
Cooling System Maintenance
Flush and replace the coolant every 30,000 miles or 2 years, whichever comes first. Use a 50/50 mix of antifreeze and distilled water to prevent corrosion in the aluminum components. Regularly inspect hoses, connections, and the water pump for leaks or signs of wear.
Important: Only use coolant formulated for aluminum engines to prevent galvanic corrosion.
Air Filter Replacement
Inspect the air filter every 15,000 miles and replace as needed or at least once annually. A clean air filter is critical for maintaining proper air-fuel ratios and preventing contaminants from entering the engine. Performance applications may require more frequent replacement intervals.
Spark Plug Maintenance
Replace spark plugs every 30,000-60,000 miles depending on driving conditions. The LS3's coil-on-plug ignition system requires less frequent maintenance than traditional systems, but regular inspection is still recommended. Use only OEM-recommended iridium or platinum plugs with the correct heat range.
Gap Specification: 0.040" to 0.045" for stock applications
Valve Lash Adjustments
Check and adjust valve clearances every 60,000 miles using the specifications provided by GM. Proper valve adjustment ensures optimal performance, fuel economy, and prevents premature valve train wear. This procedure requires specialized tools and knowledge of engine timing procedures.
Maintenance Schedule Summary:
- Every 3,000-5,000 miles: Oil and filter change
- Every 15,000 miles: Air filter inspection/replacement
- Every 30,000 miles: Coolant flush, spark plug replacement
- Every 60,000 miles: Valve lash adjustment, accessory belt inspection
Following this schedule will help maintain peak performance and extend the life of your LS3 crate engine.
How to Choose the Right LS3 Crate Engine
Selecting the ideal LS3 crate engine requires careful consideration of several factors to ensure it meets your specific needs and performance goals.
Different applications demand specific engine characteristics:
- Street Performance: Consider the standard 430 HP LS3 for reliable daily driving with excellent performance
- Track Racing: The 480 HP variant offers additional power for competitive environments
- Drag Racing: The supercharged 600+ HP model provides maximum acceleration
- Off-Road: Focus on torque characteristics and durability rather than peak horsepower
Determine your horsepower and torque needs based on:
- Vehicle weight and intended use
- Transmission type and gear ratios
- Differential ratio and tire size
- Performance goals (top speed, acceleration, etc.)
Remember that more power isn't always better - match the engine to your specific application for optimal results.
LS3 crate engines range from $7,000 to $15,000+ depending on specifications. Consider these cost factors:
- Base engine cost increases with horsepower ratings
- Installation components add $1,500-$3,000+ (mounts, accessories, etc.)
- Professional installation: $2,000-$4,000 if not DIY
- Supporting modifications: cooling, fuel system, exhaust ($1,000-$5,000)
Establish a realistic total budget before selecting your engine package.
Assess the installation requirements:
- Direct Replacement: Easiest when replacing an existing LS-series engine
- Engine Swap: Requires additional components and possible fabrication
- ECU Compatibility: Consider if you need the controller kit for your application
- Skill Level Required: Honest assessment of your mechanical abilities
Warranty and Support
Consider the following warranty aspects when selecting your LS3 crate engine:
- Manufacturer Warranty: GM Performance offers a 24-month/50,000-mile warranty on most crate engines when installed in accordance with their guidelines
- Aftermarket Warranties: Some retailers offer extended coverage options at additional cost
- Technical Support: Evaluate the availability of installation guidance and troubleshooting assistance
- Documentation: Comprehensive installation manuals and wiring diagrams are essential
Important Consideration: Modifications such as tuning changes, aftermarket parts, or using the engine in racing applications may void manufacturer warranties. Always verify warranty terms before purchase and understand how your intended use may affect coverage.
DIY LS3 Crate Engine Installation Guide
Installing an LS3 crate engine requires mechanical knowledge, proper tools, and careful planning. This guide outlines the general process, but specific applications may require additional steps.
Preparation Phase
Gather Tools and Equipment
- Socket set (metric and standard) with extensions
- Torque wrench capable of 25-100 ft-lbs range
- Engine hoist (minimum 1-ton capacity) and engine stand
- Jack stands and floor jack
- Transmission jack (if applicable)
- Electrical tools (multimeter, wire strippers, crimping tools)
Prepare Work Area
- Ensure adequate workspace with good lighting
- Lay out all components and organize hardware
- Have service manual or installation guides accessible
- Prepare fluid catch pans and disposal containers
Disconnection and Removal
- Disconnect battery and drain all fluids (coolant, oil)
- Label all electrical connections before disconnecting
- Remove accessory components (air intake, radiator, etc.)
- Unbolt and remove exhaust headers/manifolds
- Disconnect transmission from the engine
- Support the engine and remove motor mounts
- Carefully lift the old engine using proper lifting points
Installation Phase
Prepare the New LS3 Engine
- Install any necessary components not included with the crate engine
- Transfer accessories from old engine if compatible
- Install flywheel/flexplate and torque to specifications
- Mount engine to engine stand for easier component installation
Install Engine in Vehicle
- Attach engine to hoist using proper lifting brackets
- Carefully lower engine into engine bay, aligning with mount locations
- Install and torque engine mount bolts to specification
- Align and connect transmission
- Torque transmission bolts in sequence per specifications
Connect Systems and Components
- Install exhaust headers/manifolds
- Connect cooling system components
- Install intake components
- Connect fuel system lines and verify proper routing
- Attach all electrical connections according to labels/diagrams
- Install accessory drive components and belts
Final Connections and Fluids
- Fill engine with recommended oil type and quantity
- Fill cooling system with proper coolant mixture
- Connect battery
- Verify all connections are secure
- Check for proper clearance around all components
Initial Startup and Testing
- Prime the oil system before starting (if possible)
- Start engine and immediately check for oil pressure
- Inspect for fluid leaks while running
- Allow engine to reach operating temperature
- Check all systems for proper operation
- Perform initial ECU calibration if required
Professional Installation Recommendation: If you're unsure about any aspect of the installation process, consider professional installation. The cost of professional installation ($2,000-$4,000) may be well worth avoiding potential damage to your expensive crate engine or vehicle. Many shops also offer partial assistance where you can perform some work yourself under guidance.
Frequently Asked Questions About LS3 Crate Engines
An LS3 crate engine is a complete, ready-to-install 6.2-liter V8 engine assembly manufactured by General Motors. Originally introduced in 2008 for the Chevrolet Corvette and Camaro SS, it's now available as a "crate engine" that can be purchased directly for installation in various vehicles. These engines come fully assembled with intake manifold, exhaust manifolds, ignition system, and other key components, making them ideal for engine swaps and performance builds.
Yes, the LS3 crate engine is widely regarded as an excellent performance engine. With 430 horsepower and 425 lb-ft of torque in its standard configuration, it offers an outstanding power-to-weight ratio. The LS3's aluminum block construction saves weight while maintaining strength, and its efficient overhead valve design provides excellent performance across a wide RPM range. The engine's reliability, parts availability, and tremendous aftermarket support make it one of the most popular choices for performance builds ranging from street cars to dedicated race vehicles.
LS3 crate engine pricing varies based on configuration, included components, and supplier. Current market prices typically range:
- Base LS3 (430 HP): $7,000 - $9,000
- Enhanced LS3 (480 HP): $8,500 - $11,000
- Supercharged LS3 (600+ HP): $12,000 - $15,000+
These prices generally include the base engine assembly but may not include additional components required for installation such as the controller kit, accessory drive, or specific mounting hardware. Always verify what's included in the package before purchase.
The LS3 engine was factory-installed in several high-performance GM vehicles, including:
- 2008-2013 Chevrolet Corvette (base model)
- 2010-2015 Chevrolet Camaro SS
- 2009-2010 Pontiac G8 GXP
- 2014-2017 Chevrolet SS sedan
- 2008-2009 Holden Commodore HSV (Australian market)
- Various limited production vehicles and specialty cars
The LS3 has also become a popular engine swap option for numerous other vehicles including classic muscle cars, trucks, and even some import platforms due to its excellent power delivery and compact dimensions.
The LS3 represents a significant evolution over the earlier LS2 engine with several key differences:
- Displacement: LS3: 6.2L (376ci) vs LS2: 6.0L (364ci)
- Horsepower: LS3: 430 HP vs LS2: 400 HP
- Cylinder Heads: LS3 features redesigned L92-style heads with rectangular intake ports for improved airflow
- Intake Manifold: LS3 uses a higher-flowing intake manifold design
- Fuel Efficiency: LS3 generally offers better fuel economy despite higher power output
- Block Casting: LS3 uses an improved casting with strengthened bulkheads
While both engines share the same basic architecture, the LS3's improvements in displacement, cylinder head design, and intake flow result in significantly better performance potential, making it the preferred choice for most performance applications.