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The Pontiac 455 engine has long been a favorite among muscle car enthusiasts for its power and performance. When fully tuned, it can deliver impressive horsepower figures. In this article, we will explore the real-world results of a fully tuned Pontiac 455 that produces an astounding 455 horsepower using Summit Racing parts.
Understanding the Pontiac 455 Engine
The Pontiac 455 was introduced in 1970 and quickly gained popularity due to its large displacement and robust design. This engine was part of the Pontiac V8 family and was known for its torque and horsepower. Here are some key specifications:
- Displacement: 455 cubic inches
- Configuration: V8
- Block Material: Cast iron
- Head Material: Cast iron
Components Used in the Build
To achieve 455 horsepower, specific components are essential for tuning the Pontiac 455. The following Summit Racing parts were utilized in this build:
- Summit Racing Aluminum Cylinder Heads
- Summit Racing Intake Manifold
- Summit Racing Carburetor
- Summit Racing Camshaft
- Summit Racing Headers
Engine Tuning Process
The tuning process is crucial for maximizing the performance of the Pontiac 455. Here’s a breakdown of the steps involved:
- Choosing the right camshaft for optimal lift and duration.
- Installing high-flow cylinder heads to improve airflow.
- Using a performance intake manifold to enhance air-fuel mixture.
- Tuning the carburetor for precise fuel delivery.
- Optimizing ignition timing for maximum power output.
Real-World Dyno Results
After completing the build and tuning process, the Pontiac 455 was taken to a dynamometer for testing. The results were impressive:
- Peak Horsepower: 455 HP at 5,500 RPM
- Peak Torque: 500 lb-ft at 4,000 RPM
- Fuel Type: 93 octane gasoline
Performance on the Road
The real-world performance of the Pontiac 455 is just as impressive as the dyno results. Here are some observations:
- Acceleration: The engine provides strong acceleration from a standstill.
- Throttle Response: Immediate and responsive, allowing for quick overtaking.
- Sound: The exhaust note is deep and aggressive, a hallmark of muscle cars.
Conclusion
The Pontiac 455, when fully tuned with quality parts from Summit Racing, can deliver an impressive 455 horsepower. This build showcases the potential of classic muscle car engines and the effectiveness of aftermarket performance parts. Whether on the dyno or the road, the Pontiac 455 remains a powerful contender in the world of high-performance engines.