The 350 motor is more than just an engine; it’s a cornerstone of American automotive history. Known for its power, versatility, and incredible performance, the 350 small-block V8 is a favorite among car enthusiasts, whether they’re restoring a classic, building a custom vehicle, or simply seeking to understand one of the most iconic engines ever produced. However, understanding the weight of the 350 motor is a crucial element for any project.
The engine’s weight impacts many aspects of vehicle handling, installation, and overall performance. In this article, we will dive deep into the specifics of the 350 motor’s weight, explore the different configurations over the years, and analyze the factors that influence its weight. We will also look at how its weight affects overall vehicle dynamics and performance, providing you with all the information you need to make informed decisions when working with this engine.
What Is a 350 Motor?
The 350 motor, commonly known as the small-block V8, is a 5.7-liter engine produced by General Motors. The name “350” comes from its displacement—350 cubic inches (or 5.7 liters), and this engine has been one of the most used in automotive applications since its introduction in 1967. Its versatility, balance of power, ease of modification, and durability have made it a go-to engine for a variety of vehicles, from muscle cars like the Chevrolet Camaro and Corvette to trucks and even boats.
Key Specifications of the 350 Motor:
- Displacement: 350 cubic inches (5.7 liters)
- Configuration: V8 engine, OHV (overhead valve) with two valves per cylinder
- Bore x Stroke: 4.00″ x 3.48″
- Block Material: Cast iron (though some versions feature aluminum components)
- Fuel Delivery: Carbureted or fuel-injected depending on the model and year
The 350 motor’s simplicity and robust design made it an ideal starting point for performance modifications, and over the years, improvements to internal components, such as camshafts, pistons, and cylinder heads, have made the 350 a highly tunable engine.
Types of 350 Motors
The 350 motor has been produced in various configurations over the years, each with unique features, material variations, and specifications. These differences affect not only the engine’s performance but also its weight.
1. Original Production Engines (1967–2002)
The early versions of the 350 engine were cast iron and widely used in a variety of GM vehicles. They ranged from standard configurations to high-performance versions. The most common uses were in:
- Passenger Cars: Like the Chevrolet Camaro, Impala, and Corvette
- Trucks: Primarily in Chevrolet and GMC trucks
- Marine Applications: In boats and other marine vehicles
These engines were built to last and were designed for both everyday driving and high-performance applications.
- Standard 350: Common in base models of cars and trucks, providing a solid performance for daily use.
- High-Performance 350: Found in performance vehicles such as the Camaro Z28 and Corvette, featuring higher compression ratios, more powerful camshafts, and stronger internal components.
- Marine 350: Designed to handle the challenges of marine environments, including corrosion resistance.
2. Crate Engines (2002–Present)
As demand for high-performance and custom builds grew, GM began offering crate engines, including the 350, for installation in custom vehicles and classic car restorations. These engines are typically new or remanufactured and come in various configurations:
- Base Crate Engine: Standard components suitable for general applications.
- Performance Crate Engine: Features upgraded components such as camshafts, pistons, and cylinder heads to increase horsepower and torque.
- Marine Crate Engine: Specifically designed for boating, with added features to handle the conditions of marine use.
These crate engines have been a game-changer for enthusiasts, offering factory-new engines with warranty coverage for custom and performance applications.
3. Aluminum Block Versions
To reduce the weight of the 350 motor, some versions of the engine have been made with aluminum blocks, primarily for high-performance and racing applications. Aluminum blocks offer the same performance characteristics as cast iron but with a lighter weight, which helps in improving vehicle handling and acceleration. These versions are commonly used in:
- Racing Cars: Where every pound counts.
- Performance Builds: In custom vehicles where weight reduction is a priority.
How Much Does a 350 Motor Weigh?
The weight of a 350 motor can vary significantly based on several factors including the configuration, materials used, and whether it’s a bare block or fully dressed. Here’s a breakdown of the approximate weight for each stage of the engine assembly:
Bare Block (Engine Block Only)
- Weight: Approximately 150 pounds (68 kg)
This is the weight of the motor block without any internal components or external accessories.
Short Block (Block, Crankshaft, Rods, Pistons)
- Weight: 250–300 pounds (113–136 kg)
The short block includes the engine block, crankshaft, connecting rods, and pistons but doesn’t include the cylinder heads, camshaft, or timing components.
Long Block (Short Block Plus Heads, Camshaft, Timing Components)
- Weight: 400–450 pounds (181–204 kg)
The long block includes the short block along with the cylinder heads, camshaft, and timing components. It’s ready for assembly with accessories like the intake manifold.
Fully Dressed (Includes Intake Manifold, Carburetor, Accessories)
- Weight: 500–600 pounds (227–272 kg)
A fully dressed 350 motor includes all necessary components for a running engine, such as the intake manifold, carburetor or fuel injection system, alternator, water pump, and power steering pump. This is the engine ready to be installed into a vehicle.
Aluminum Block Version
- Weight: 400–500 pounds (181–227 kg)
The aluminum block version is lighter than the cast-iron version, offering a weight-saving of approximately 100 pounds, which is crucial for high-performance applications.
Comparison Table: 350 Motor Weights
| Engine Type | Weight (lbs) | Weight (kg) | Material | Performance Level | Price Range (USD) |
|---|---|---|---|---|---|
| Bare Block | 150 | 68 | Cast Iron | Base Engine | $150–$500 |
| Short Block | 250–300 | 113–136 | Cast Iron | Standard Engine | $500–$1,500 |
| Long Block | 400–450 | 181–204 | Cast Iron | Performance Upgrade | $1,500–$3,000 |
| Fully Dressed | 500–600 | 227–272 | Cast Iron/Aluminum | Complete, Ready to Install | $3,000–$5,000 |
| Aluminum Block Version | 400–500 | 181–227 | Aluminum | High-Performance Builds | $4,000–$6,000 |
Basics of a 350 Motor Weight
Understanding the weight of a 350 motor is essential for several practical reasons:
Installation
The weight of the motor affects the type of lifting equipment required for installation. A heavier motor may require additional support, stronger hoists, and more preparation to install properly. This is especially important for custom builds or vehicle modifications where the engine may need to be lifted into place.
Vehicle Handling
The weight distribution of an engine can have a significant impact on vehicle handling. A heavier motor can shift the vehicle’s center of gravity, affecting braking, acceleration, and cornering. For performance vehicles, the 350 motor’s weight can alter how the car behaves on the road, especially in terms of balance and handling dynamics.
Restoration Projects
For car enthusiasts restoring classic vehicles, having the correct motor weight ensures the project remains authentic. Classic car restorations often require specific components to be used, and keeping the weight consistent with original factory specifications helps maintain the vehicle’s value and performance.
Factors Influencing a 350 Motor’s Weight
Several factors can contribute to the overall weight of a 350 motor. These include the material used for components, engine configuration, and the presence of additional accessories.
Block Material
- Cast Iron: The traditional and heavier material used for the engine block. Cast iron is known for its durability, which contributes to the weight.
- Aluminum: Lighter than cast iron, aluminum is used in high-performance and racing applications to reduce the engine’s overall weight.
Cylinder Heads
- Cast Iron Heads: These are heavier and are typically found in standard 350 motors. They are strong and durable but contribute to the overall weight.
- Aluminum Heads: Lighter than cast iron, aluminum heads are used in performance applications to reduce the weight of the motor and improve airflow.
Intake Manifold
- Cast Iron Intake: These are heavier and are typically used in standard applications.
- Aluminum Intake: Lighter and more efficient, aluminum intake manifolds are often found in high-performance setups.
Accessories
Accessories such as the alternator, air conditioning compressor, water pump, and power steering pump add significant weight to the motor. These components can vary in size and weight depending on the model and application.
Fuel Delivery System
- Carbureted Systems: These are lighter than fuel-injected systems, which require additional components such as fuel rails, injectors, and electronic sensors.
Why Does a 350 Motor’s Weight Matter?
The weight of the 350 motor plays a role in various aspects of vehicle performance, from handling to installation.
Handling
The weight distribution of the engine can impact how the vehicle handles on the road. A heavier engine may make the vehicle more prone to understeering, while a lighter engine could improve cornering ability.
Performance
The engine’s weight affects the power-to-weight ratio, which is critical for acceleration, braking, and overall performance. Lighter engines tend to perform better in terms of acceleration and fuel efficiency.
Installation
A heavier engine requires more support and stronger mounts to ensure proper installation. Additionally, larger engines may require more space in the vehicle’s engine bay.
How Much Does a 350 Motor Cost?
The cost of a 350 motor can vary greatly depending on its configuration, condition, and whether it is new, remanufactured, or used. Here’s an estimated price range:
- Used Engines: $500–$2,000, depending on condition and mileage
- Remanufactured Engines: $2,000–$4,000, typically sold with warranties
- New Crate Engines: $4,000–$7,000, depending on specifications and performance levels
How Much Does It Cost to Rent a 350 Motor?
While renting a 350 motor is uncommon for most personal use, certain industrial or marine applications may offer rental options. Rental costs generally range from:
- Daily Rental: $100 to $300 per day
- Weekly Rental: $500 to $1,500 per week
How Much Fuel Does a 350 Motor Use?
Fuel consumption depends on the engine configuration and how it’s tuned. Typically, a 350 motor in a standard vehicle will achieve:
- Carbureted Engines: Around 15–20 miles per gallon (mpg)
- Fuel-Injected Engines: Around 18–22 mpg, depending on the tuning and vehicle setup
How Fast Can a 350 Motor Go?
The top speed of a 350-powered vehicle depends on the vehicle’s design and modifications. With stock setups, the vehicle can reach speeds between 100–120 mph. However, performance upgrades can significantly increase this speed.
Dimensions of a 350 Motor
The 350 motor’s dimensions are crucial for fitting it into a vehicle’s engine bay, especially in restoration and custom projects:
- Length: 26–28 inches (660–711 mm)
- Width: 24–26 inches (610–660 mm)
- Height: 28–30 inches (711–762 mm)
How Much Weight Can a 350 Motor Hold?
The weight capacity of a 350 motor is determined by the vehicle’s Gross Vehicle Weight Rating (GVWR). The GVWR defines the maximum weight a vehicle can safely carry, including the engine, passengers, and cargo.
Conclusion
The 350 motor continues to be a staple in the automotive world due to its impressive performance, durability, and versatility. Whether you’re restoring a classic car, building a custom project, or just curious about this engine’s specifics, understanding the weight of the 350 motor is essential for making informed decisions. The motor’s weight affects everything from handling to installation and can play a significant role in the overall performance of your vehicle.
Fun Facts
- The 350 motor has been in continuous production since 1967.
- Over 100 million small-block engines, including the 350, have been produced by General Motors.
- The 350 motor has powered everything from performance cars to trucks, and even marine vehicles, making it one of the most adaptable engines in history.