Table of Contents
The Chevy Big Block 396 engine is a classic powerhouse that has captured the hearts of car enthusiasts and racers alike. Known for its impressive torque and horsepower, the 396 is often the foundation for performance builds. One of the key areas to focus on when looking to increase horsepower is the cylinder heads. In this article, we will explore the porting options available for the Chevy Big Block 396 heads and discuss various aftermarket options that can provide a significant boost in horsepower.
Understanding the Chevy Big Block 396 Heads
The Chevy Big Block 396 heads are designed to support the engine’s performance characteristics. These heads come in various configurations and casting numbers, which can affect their performance potential. Understanding the differences between these heads is crucial for maximizing horsepower.
- Factory cast iron heads
- Aluminum aftermarket heads
- Different casting numbers and their implications
Porting the Chevy Big Block 396 Heads
Porting is the process of modifying the intake and exhaust ports of the cylinder heads to improve airflow. This can lead to significant gains in horsepower and torque. Here are some key considerations when porting the Chevy Big Block 396 heads:
- Identify the type of heads you have
- Determine the goals of your build
- Choose between DIY porting or professional services
Diy Porting Techniques
For those looking to save money, DIY porting can be an option. However, it requires a good understanding of the airflow dynamics and the right tools. Here are some common techniques:
- Grinding and shaping the ports
- Polishing the intake and exhaust surfaces
- Matching the ports to the intake manifold and headers
Professional Porting Services
For those who want guaranteed results, hiring a professional to port your heads can be beneficial. Professional porters have the experience and tools necessary to maximize airflow without compromising the integrity of the heads. Benefits of professional porting include:
- Expert analysis of airflow
- Customized port shapes for your specific engine setup
- Increased horsepower and torque potential
Aftermarket Head Options for the Chevy Big Block 396
If porting is not an option or you want to explore other avenues for increasing horsepower, aftermarket heads are a great alternative. These heads are designed with performance in mind and often feature advanced materials and technology.
- Aluminum heads for weight savings
- High-flow designs for increased horsepower
- Compatibility with modern fuel and performance setups
Popular Aftermarket Head Choices
There are several aftermarket head options available for the Chevy Big Block 396. Here are some of the most popular choices among enthusiasts:
- Edelbrock Performer RPM Heads
- AFR (Air Flow Research) Heads
- Brody’s Heads
Comparing Aftermarket Heads
When choosing aftermarket heads, it’s essential to compare the specifications and features of each option. Consider the following factors:
- Flow numbers at various lift points
- Weight and material composition
- Price and availability
Conclusion
Whether you choose to port your existing Chevy Big Block 396 heads or invest in aftermarket options, there are numerous ways to unlock additional horsepower. Understanding the intricacies of the heads and airflow will help you make informed decisions that can lead to impressive performance gains. With the right modifications, achieving 100+ additional horsepower is within reach, allowing you to fully enjoy the power of your classic Chevy Big Block engine.