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The automotive world is filled with enthusiasts who constantly seek to push the limits of performance and power. One of the most iconic engines in American muscle car history is the Chrysler 340 V8. Known for its robust design and performance potential, the 340 has become a favorite among gearheads looking to modify their Mopar vehicles. In this article, we will explore the real-world results of a 340-powered Mopar that achieved an impressive 350 horsepower and 400 lb-ft of torque after a series of modifications.
Understanding the Chrysler 340 Engine
The Chrysler 340 engine was introduced in 1968 and quickly gained a reputation for its high-revving capabilities and strong performance. It was designed as a lightweight, high-performance engine, making it a popular choice for muscle cars of the era. The 340 features a 4.04-inch bore and a 3.31-inch stroke, with a compression ratio of 10.5:1, allowing it to produce significant power even in stock form.
Modifications That Made a Difference
To achieve the remarkable figures of 350 hp and 400 lb-ft of torque, several key modifications were made to the engine. These upgrades not only enhanced performance but also improved the overall driving experience.
- Intake System Upgrade: A high-performance intake manifold was installed to improve airflow into the engine.
- Carburetor Swap: The stock carburetor was replaced with a larger, more efficient Holley carburetor for better fuel delivery.
- Exhaust System Enhancement: A custom exhaust system was added to reduce back pressure and enhance exhaust flow.
- Camshaft Replacement: A performance camshaft was chosen to optimize valve timing and increase horsepower.
- Ignition System Upgrade: An upgraded ignition system was installed to ensure a strong spark and improve combustion efficiency.
Real-World Testing and Results
After completing the modifications, the Mopar was taken to a local dynamometer for testing. The results were impressive, showcasing the effectiveness of the upgrades. The engine produced a peak horsepower of 350 at 5,800 RPM and a torque output of 400 lb-ft at 4,200 RPM.
Performance Metrics
The performance metrics obtained from the dynamometer provided valuable insights into the engine’s capabilities:
- Peak Horsepower: 350 hp at 5,800 RPM
- Peak Torque: 400 lb-ft at 4,200 RPM
- 0-60 mph Time: Approximately 5.5 seconds
- Quarter Mile Time: 13.5 seconds
Driving Experience and Feedback
With the modifications complete, the driving experience transformed significantly. The engine responded eagerly to the throttle, delivering a thrilling ride that showcased the true potential of the 340 V8. Enthusiasts reported an exhilarating acceleration and a satisfying engine note that made driving the vehicle a joy.
Conclusion
The journey of modifying a Chrysler 340 engine to achieve 350 hp and 400 lb-ft of torque is a testament to the capabilities of this iconic powerplant. With the right upgrades, the 340 can deliver impressive performance that rivals modern engines. For Mopar enthusiasts, these real-world results serve as inspiration to explore the potential of their own vehicles and push the boundaries of performance.