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The Chevy 396 big block engine is a classic American powerhouse that has captivated car enthusiasts for decades. Known for its performance and reliability, this engine can be built to produce impressive horsepower. In this article, we will explore a complete build of the Chevy 396 big block, taking it from stock to a remarkable 550 horsepower. We will also break down the costs involved and the results of the build.
Understanding the Chevy 396 Big Block
The Chevy 396 was introduced in 1965 and quickly became a favorite among muscle car fans. Originally designed for high-performance vehicles, this engine features a robust design that allows for substantial power upgrades. Understanding its components and potential is crucial for any build.
- Engine Displacement: 396 cubic inches
- Configuration: V8
- Production Years: 1965-1972
Stock Specifications
A stock Chevy 396 typically produces around 325 to 360 horsepower, depending on the specific model and year. The engine features a cast iron block, a standard compression ratio of about 10.25:1, and a Holley carburetor. Understanding these specs is essential before diving into modifications.
Key Components of a Stock 396
- Block: Cast iron
- Crankshaft: Forged steel
- Cylinder Heads: Closed chamber
- Camshaft: Hydraulic flat tappet
Modifications for Increased Power
To achieve 550 horsepower from a Chevy 396, several modifications are necessary. These adjustments will enhance airflow, increase compression, and improve fuel delivery. Below are the key components to consider when building your engine.
Performance Upgrades
- Aftermarket Cylinder Heads: Upgrading to aluminum heads can significantly improve airflow.
- High-Performance Camshaft: A more aggressive cam profile will increase lift and duration for better performance.
- Upgraded Intake Manifold: A high-rise manifold allows for better airflow and fuel distribution.
- Holley Carburetor: A larger carburetor will provide the necessary fuel for increased power.
- Headers: Upgrading to long-tube headers can improve exhaust flow and reduce back pressure.
Cost Breakdown
Building a Chevy 396 big block to 550 horsepower involves various costs. Below is a general breakdown of expenses associated with the build:
- Engine Block Rebuild: $1,500 – $2,500
- Aftermarket Cylinder Heads: $1,200 – $2,000
- Camshaft Upgrade: $300 – $600
- Intake Manifold: $200 – $500
- Carburetor: $500 – $800
- Exhaust Headers: $300 – $600
- Miscellaneous Parts (gaskets, bolts, etc.): $300 – $500
Results of the Build
After completing the modifications, the performance improvements are significant. The following results were achieved on a dynamometer:
- Peak Horsepower: 550 hp at 6,000 RPM
- Peak Torque: 550 lb-ft at 4,500 RPM
- Improved Throttle Response: Noticeable increase in responsiveness at lower RPMs.
- Enhanced Engine Sound: A more aggressive exhaust note that many enthusiasts appreciate.
Conclusion
The Chevy 396 big block engine is a versatile platform that can be transformed into a high-performance powerhouse with the right modifications. By investing in quality parts and understanding the engine’s potential, enthusiasts can achieve impressive results. Whether for racing or cruising, a 550 hp Chevy 396 can deliver thrilling performance and an unforgettable driving experience.