When you think of American performance engines, the 350 Chevy small-block is one that undoubtedly stands out. It’s a symbol of power, longevity, and adaptability, powering a range of vehicles from muscle cars and trucks to boats and industrial equipment. But when you’re working on a project that involves the 350 Chevy motor, there’s one important factor that often gets overlooked: the weight.
The weight of the 350 Chevy motor has a direct impact on a variety of aspects including vehicle handling, installation process, and overall performance. Whether you’re restoring a classic, swapping engines in a project car, or simply curious about this iconic engine’s specifications, understanding the weight of the 350 Chevy motor is essential.
In this article, we will dive deep into the factors that influence the weight of this motor, the different variations over the years, and how its weight affects performance, handling, and more.
What Is a 350 Chevy Motor?
The 350 Chevy motor is a 5.7-liter V8 engine that was first introduced by General Motors in 1967 as part of the small-block engine family. This engine became one of the most popular and versatile engines in automotive history due to its balance of performance, durability, and modification potential. Whether in a muscle car, a truck, or even a boat, the 350 has proven to be a workhorse in many applications.
Key Features of the 350 Chevy Motor:
- Displacement: 350 cubic inches (5.7 liters)
- Configuration: V8 engine with overhead valves (OHV) and 2 valves per cylinder
- Bore and Stroke: 4.00″ x 3.48″
- Block Material: Cast iron (with some versions using aluminum components)
- Fuel Delivery: Initially carbureted, later versions used fuel injection systems depending on the year and application
- Common Uses: Passenger cars, trucks, boats, and industrial machinery
The 350 Chevy engine is known for its power-to-weight ratio, ease of modification, and its incredible durability, which has made it a go-to option for performance enthusiasts and professionals alike. It has been in continuous production for over five decades, proving its reliability across various applications.
Types of 350 Chevy Motors
Over the years, the 350 Chevy engine has gone through various iterations. These engines were built with different materials, specifications, and technologies based on their intended use. Below, we’ll cover the most notable types of 350 Chevy motors.
1. Original Production Engines (1967–2002)
These are the engines that formed the foundation of the 350 small-block V8 and were primarily made from cast iron. The most famous applications were in cars such as the Chevrolet Camaro, Corvette, and various trucks. The 350 small-block was available in different configurations:
- Standard 350: Used in passenger cars and light trucks
- High-Performance 350: Featured in performance models like the Camaro Z28 and Corvette, these engines had higher compression ratios and performance components
- Marine 350: Designed specifically for marine applications, often featuring corrosion-resistant components
These original engines were built to be reliable, but they also became a favorite for enthusiasts looking to modify their vehicles for better performance.
2. Crate Engines (2002–Present)
Due to the increasing demand for performance and customization, GM began offering 350 small-block crate engines in the early 2000s. These engines are sold as complete units, either as remanufactured engines or new, and come in different configurations:
- Base Crate Engine: Typically features standard components, suitable for general applications and street use
- Performance Crate Engine: These engines come with upgraded components like high-performance camshafts, pistons, and fuel systems for enhanced performance
- Marine Crate Engine: Designed for use in boats, these engines come with modifications that make them suitable for marine applications, including corrosion-resistant features
These engines are sold as complete units and are ideal for those undertaking engine swaps, restorations, or custom builds.
3. Aluminum Block Versions
In order to reduce the weight of the 350 Chevy motor, some manufacturers and enthusiasts have turned to aluminum blocks. These engines are typically used in high-performance applications where weight reduction is critical, such as in racing. Aluminum blocks offer similar performance characteristics as their cast iron counterparts but at a much lighter weight.
- Performance Applications: Often seen in racing cars, muscle cars, and high-performance street cars
- Weight Reduction: The aluminum block significantly reduces engine weight while maintaining performance, making it ideal for applications where handling and speed are critical
These engines represent the evolution of the 350 small-block, pushing the limits of performance while considering weight savings.
How Much Does a 350 Chevy Motor Weigh?
The weight of a 350 Chevy motor depends on the version, components, and materials used. Below, we will break down the weight based on different configurations and stages of assembly.
Bare Block Weight:
- Weight (lbs): Approximately 150 pounds
- Weight (kg): Approximately 68 kg
The bare block refers to just the engine block without any internal components like the crankshaft, pistons, or cylinder heads. This is the lightest form of the engine and is typically used when building or rebuilding an engine from scratch.
Short Block Weight:
- Weight (lbs): Around 250–300 pounds
- Weight (kg): Approximately 113–136 kg
The short block includes the engine block, crankshaft, rods, and pistons. It is a more complete assembly but does not yet include the cylinder heads, intake manifold, or other accessories.
Long Block Weight:
- Weight (lbs): Approximately 400–450 pounds
- Weight (kg): Approximately 181–204 kg
A long block adds the cylinder heads, camshaft, timing components, and other essential parts to the short block. It’s nearly ready for installation, with the exception of accessories like the intake manifold, carburetor, and alternator.
Fully Dressed Weight:
- Weight (lbs): Between 500–600 pounds
- Weight (kg): Between 227–272 kg
A fully dressed engine includes all the necessary components for operation, such as the intake manifold, carburetor or fuel injection system, alternator, power steering pump, and water pump. This is the complete engine ready to be installed in a vehicle.
Aluminum Block Version:
- Weight (lbs): 400–500 pounds
- Weight (kg): 181–227 kg
The aluminum block version of the 350 small-block is lighter than the standard cast iron version, providing a significant weight savings while maintaining similar performance characteristics.
Comparison Table: 350 Chevy Motor Weights
| Engine Type | Weight (lbs) | Weight (kg) | Material | Typical Application |
|---|---|---|---|---|
| Bare Block | 150 | 68 | Cast Iron | Engine block only |
| Short Block | 250–300 | 113–136 | Cast Iron | Basic engine assembly |
| Long Block | 400–450 | 181–204 | Cast Iron | Complete engine minus accessories |
| Fully Dressed | 500–600 | 227–272 | Cast Iron/Aluminum | Ready-to-install engine |
| Aluminum Block Version | 400–500 | 181–227 | Aluminum | High-performance applications |
Basics of a 350 Chevy Motor Weight
Understanding the weight of a 350 Chevy motor is crucial for various reasons:
- Installation: Knowing the engine’s weight helps you plan for appropriate lifting equipment (such as hoists or cranes) and ensure that the vehicle’s frame is strong enough to support the engine.
- Performance Tuning: The weight distribution of the engine affects the overall handling and balance of the vehicle. A heavier engine can impact the car’s center of gravity and weight distribution, which can influence cornering, braking, and acceleration.
- Restoration and Authenticity: For those restoring classic cars, it’s essential to use the correct engine weight to ensure the authenticity of the restoration. Using the correct engine helps maintain the vehicle’s original performance specifications.
Factors Influencing the 350 Chevy Motor’s Weight
Several factors contribute to the weight of the 350 Chevy motor:
Block Material:
The material used in the construction of the engine block plays a significant role in the engine’s weight. Cast iron blocks are heavier than aluminum blocks, but they are more durable and cheaper to produce. The decision to use aluminum in high-performance or racing applications is often driven by the need to reduce weight without sacrificing strength.
Cylinder Heads:
Cylinder heads made of cast iron are heavier than aluminum heads. The material and design of the cylinder heads also affect the engine’s overall weight, with performance-oriented heads usually being lighter and more efficient.
Intake Manifold:
Cast iron intake manifolds are generally heavier than their aluminum counterparts. The choice of intake manifold material can also influence the engine’s weight. Aluminum is often used in performance applications to reduce weight and improve airflow.
Accessories:
Accessories like the alternator, air conditioning compressor, power steering pump, and water pump contribute significantly to the overall weight of the engine. These accessories can vary in size and weight, especially in high-performance engines that use lightweight components.
Fuel Delivery System:
Carbureted systems are generally lighter than fuel-injected systems. Modern fuel-injection systems often come with additional components such as electronic sensors, fuel rails, and injectors, which add to the engine’s weight.
Why Does a 350 Chevy Motor’s Weight Matter?
The weight of the 350 Chevy motor affects various aspects of your vehicle’s performance:
Handling:
A heavier engine can affect the handling dynamics of a vehicle. The added weight at the front of the car can make it more prone to understeer and affect the overall balance, especially in high-performance applications.
Performance:
The weight of the engine influences the car’s acceleration, braking, and cornering abilities. A lighter engine can improve these aspects, while a heavier engine may require modifications to compensate for the added weight.
Installation:
Heavier engines require stronger mounts and support systems. Installing a 350 Chevy motor with the correct weight ensures the engine is securely mounted and aligned within the vehicle’s engine bay.
How Much Does a 350 Chevy Motor Cost?
The cost of a 350 Chevy motor can vary based on its condition, configuration, and whether it is used, remanufactured, or new:
- Used Engines: $500–$2,000 depending on condition and mileage
- Remanufactured Engines: $2,000–$4,000
- New Crate Engines: $4,000–$7,000 depending on performance levels and specifications
How Much Does It Cost to Rent a 350 Chevy Motor?
While renting a 350 Chevy motor is not a common practice for most vehicle applications, it may be available in specific cases, such as marine or industrial uses. Rental costs can vary but generally range from $100 to $500 per day based on location and usage.
How Much Fuel Does a 350 Chevy Motor Use?
Fuel efficiency can vary depending on the configuration of the engine, the weight of the vehicle, and how it’s driven:
- Carbureted Engines: 15–20 miles per gallon (mpg) under normal driving conditions
- Fuel-Injected Engines: 18–22 mpg depending on the specific setup
How Fast Can a 350 Chevy Motor Go?
The top speed of a vehicle with a 350 Chevy motor depends on the weight of the vehicle and aerodynamics. Typically, vehicles with the 350 motor can reach speeds of 100–120 mph, and performance modifications can increase these numbers.
Dimensions of a 350 Chevy Motor
The typical dimensions of a 350 Chevy motor are:
- Length: 26–28 inches (660–711 mm)
- Width: 24–26 inches (610–660 mm)
- Height: 28–30 inches (711–762 mm)
These dimensions make the 350 Chevy motor compact enough for a variety of applications but still powerful enough to provide impressive performance.
How Much Weight Can a 350 Chevy Motor Hold?
The 350 Chevy motor doesn’t have a weight capacity per se; however, the vehicle’s Gross Vehicle Weight Rating (GVWR) determines the total weight the vehicle can safely carry, including the engine, passengers, and cargo.
Conclusion
The 350 Chevy motor remains one of the most iconic and widely used engines in automotive history. Whether you’re building a custom project, restoring a classic, or simply curious about its specifications, understanding its weight is essential. The engine’s weight impacts performance, handling, installation, and more, making it an important consideration for enthusiasts and professionals alike.
Fun Facts
- The 350 Chevy 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 is one of the most commonly used engines in motorsports due to its reliability and performance capabilities.