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The 455 Pontiac engine has long been a favorite among muscle car enthusiasts, known for its power and performance. In this article, we will explore the real-world results of upgrading a 455 Pontiac with an MSD ignition system and Flowmaster exhaust, showcasing how these modifications can lead to significant horsepower gains.
Understanding the 455 Pontiac Engine
The Pontiac 455 engine, produced from 1970 to 1976, is a big-block V8 that delivers impressive torque and horsepower. Originally designed for performance, this engine can be further enhanced with modern upgrades.
- Displacement: 455 cubic inches
- Configuration: V8
- Stock horsepower: Approximately 360 hp
- Stock torque: Approximately 500 lb-ft
Benefits of MSD Ignition Systems
MSD (Multi-Spark Discharge) ignition systems are known for their ability to improve engine performance and reliability. Here are some key benefits:
- Increased spark energy for better combustion
- Improved throttle response
- Enhanced fuel efficiency
- Reduced emissions
Installation of MSD Ignition
The installation process for an MSD ignition system typically involves replacing the stock ignition components with MSD parts, including the ignition box, coil, and distributor. This upgrade can be completed in a few hours with basic tools.
Flowmaster Exhaust Systems
Flowmaster exhaust systems are renowned for their performance and distinctive sound. Upgrading to a Flowmaster system can significantly improve exhaust flow and reduce back pressure, leading to enhanced horsepower.
- Improved exhaust flow
- Enhanced engine sound
- Durable construction
- Variety of options for different applications
Installation of Flowmaster Exhaust
Installing a Flowmaster exhaust system involves removing the stock exhaust components and replacing them with the Flowmaster system. This upgrade can often be completed in a few hours and requires minimal modifications to the vehicle.
Real-World Results: Performance Gains
After upgrading the 455 Pontiac with both the MSD ignition system and Flowmaster exhaust, we conducted performance tests to measure the gains. The results were impressive, showcasing an increase of 80 horsepower.
- Stock horsepower: 360 hp
- Post-upgrade horsepower: 440 hp
- Torque improvements: Significant increase in low-end torque
Testing Methodology
The performance testing was conducted on a dynamometer, ensuring accurate measurements of horsepower and torque. The vehicle was tested before and after the upgrades to provide a clear comparison of the gains achieved.
Conclusion
Upgrading a 455 Pontiac with an MSD ignition system and Flowmaster exhaust can yield significant performance improvements. With an increase of 80 horsepower, these modifications not only enhance the engine’s performance but also make driving more enjoyable. For muscle car enthusiasts looking to boost their engine’s capabilities, these upgrades are highly recommended.