How to Build a 400 Horse Chevy Small Block 350
Looking to unleash the full potential of your Chevy Small Block 350? In this guide, we’ll show you step-by-step how to build a 400 horsepower beast that will take your vehicle to the next level. To achieve this impressive power output, there are a few key components and considerations that you need to keep in mind. Let’s dive in!
Key Takeaways:
- Choose quality cylinder heads, like the Vortec heads from 1996-1998 truck engines, for better airflow and increased compression.
- Select the right camshaft with recommended specifications for optimal power output, including valve opening duration and valve lift.
- Optimize the air induction system by carefully selecting the intake manifold and carburetor, considering the intended engine usage.
- Ensure the lower part of the engine, the short block, can handle the increased power by consulting with an engine machinist for necessary machine services.
- With the right combination of components and thoughtful selection, it is possible to build a 400 horsepower Chevy Small Block 350 engine within a budget of around $2000.
Key Components for Increased Power
To achieve a 400 horsepower output, it’s essential to consider the right components. From cylinder heads to camshafts and the air induction system, each aspect plays a vital role in maximizing the power potential.
Starting with the cylinder heads, opting for a quality set can significantly impact engine performance. The Vortec heads from 1996-1998 truck engines are highly recommended due to their smaller chambers and improved airflow. The smaller chamber size contributes to increased compression, resulting in more power.
The next critical component is the camshaft. Choosing the right camshaft specifications is crucial for optimal power output. Look for a camshaft with a measured effective valve opening duration of around 220 to 235 degrees at 0.050 tappet lift and approximately 0.480-0.500-inch gross valve lift.
Lastly, the air induction system, consisting of the intake manifold and carburetor, should be carefully selected based on the intended usage of the engine. An aftermarket dual-plane intake manifold paired with a carburetor in the 600 to 750 CFM range is a popular choice for maximizing power.
| Component | Recommendation |
|---|---|
| Cylinder Heads | Vortec heads from 1996-1998 truck engines |
| Camshaft | Measured effective valve opening duration of 220-235 degrees at 0.050 tappet lift, and approximately 0.480-0.500-inch gross valve lift |
| Air Induction System | Aftermarket dual-plane intake manifold with a carburetor in the 600-750 CFM range |
It’s important to note that when aiming for increased power, it may be necessary to consult an engine machinist to ensure the lower part of the engine, known as the short block, can handle the higher power outputs. They can provide necessary machine services to reinforce the engine.
With careful consideration of these key components, it is possible to build a 400 horsepower Chevy Small Block 350 engine within a budget of approximately $2000.
Selecting the Right Cylinder Heads
The right choice of cylinder heads can significantly impact the performance of your Chevy Small Block 350 engine. Discover why Vortec heads are a popular option and how their unique design contributes to generating more power.
When it comes to building a 400 horsepower Chevy Small Block 350 engine, the cylinder heads play a crucial role in achieving the desired power output. Vortec heads, which were used in 1996-1998 truck engines, are a popular choice among enthusiasts.
What sets Vortec heads apart is their smaller chambers and better airflow capabilities. The smaller chamber size helps increase compression, resulting in improved power and torque. Additionally, Vortec heads feature optimized intake and exhaust ports, allowing for better airflow and more efficient combustion.
By choosing Vortec heads for your Chevy Small Block 350 engine, you can benefit from their unique design and enjoy the increased power and performance they deliver. Take note, however, that modifications to the engine block may be necessary to ensure compatibility and proper fitment.
| Advantages of Vortec Heads | Considerations |
|---|---|
| – Smaller chambers for increased compression | – Modifications to the engine block may be required |
| – Improved airflow for better combustion | |
| – Optimized intake and exhaust ports |
Choosing the Right Camshaft
The camshaft is a critical component when it comes to achieving the desired power output. Learn how to choose the perfect camshaft specifications that will maximize the performance of your Chevy Small Block 350 engine.
When selecting a camshaft for your engine, it is essential to consider the measured effective valve opening duration and gross valve lift. For optimal power, aim for a camshaft with a measured effective valve opening duration of around 220 to 235 degrees at 0.050 tappet lift and a gross valve lift of approximately 0.480-0.500 inches.
These specifications allow for efficient airflow and fuel delivery, ensuring that your engine reaches its full potential. The right camshaft will have a significant impact on the overall performance and power output of your Chevy Small Block 350.
Remember, finding the perfect camshaft is just one piece of the puzzle. It is crucial to consider the other key components, such as quality cylinder heads and an optimized air induction system, for a well-rounded and powerful engine.
| Camshaft Specifications | Recommended Range |
|---|---|
| Measured Effective Valve Opening Duration (at 0.050 tappet lift) | 220 to 235 degrees |
| Gross Valve Lift | 0.480-0.500 inches |
By carefully choosing the right camshaft specifications, you can unlock the true potential of your Chevy Small Block 350 engine. Remember to consult with experts and gather all the necessary information to make an informed decision. With the right combination of components, you can build a powerful 400 horsepower engine that will exceed your expectations.
Optimizing the Air Induction System
To unleash the full potential of your Chevy Small Block 350 engine, ensuring an efficient air induction system is essential. Discover the best intake manifold and carburetor combination based on your engine’s specific usage requirements.
When it comes to the intake manifold, an aftermarket dual-plane design is a popular choice. This type of manifold helps improve low-end torque and throttle response, making it ideal for street applications. Look for a dual-plane intake manifold that is compatible with your Chevy Small Block 350 engine.
Next, let’s talk about the carburetor. The size of the carburetor is an important consideration, as it directly affects the engine’s performance. For most Chevy Small Block 350 engines, a carburetor in the 600 to 750 CFM range is a good starting point. However, it’s important to carefully evaluate your engine’s specific usage requirements to determine the optimal carburetor size.
Whether you’re building a high-performance street machine or a weekend cruiser, choosing the right intake manifold and carburetor combination is crucial for maximizing power and drivability. Take into account factors such as your desired power output, engine displacement, and intended usage. Consulting with an experienced automotive professional can provide valuable insights and help you make informed decisions.
