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The 5.7 HEMI engine has gained a reputation for its performance and power potential. One of the most effective modifications to enhance its capabilities is a camshaft upgrade. In this article, we will explore the real-world results of a cam upgrade on a 5.7 HEMI, focusing on the power gains observed on the dyno.
Understanding the 5.7 HEMI Engine
The 5.7 HEMI engine, introduced by Chrysler, features a unique hemispherical combustion chamber design that optimizes airflow and combustion efficiency. This engine is known for its impressive torque and horsepower, making it a popular choice for performance enthusiasts.
Why Upgrade the Camshaft?
A camshaft upgrade can significantly alter the engine’s performance characteristics. The camshaft controls the timing and duration of the valve openings, which directly affects airflow into and out of the engine. Upgrading to a performance cam can lead to:
- Increased horsepower and torque
- Improved throttle response
- Enhanced engine sound
Choosing the Right Camshaft
When selecting a camshaft for the 5.7 HEMI, it’s essential to consider various factors:
- Intended use of the vehicle (daily driving vs. racing)
- Desired power band and RPM range
- Compatibility with existing components (e.g., headers, intake)
Real World Dyno Results
To evaluate the performance gains from a camshaft upgrade, a 5.7 HEMI equipped with a new cam was tested on a dynamometer. The following parameters were measured:
- Baseline power output
- Post-upgrade power output
- Torque curves
Baseline Power Output
Before the cam upgrade, the 5.7 HEMI produced a baseline power output of approximately 360 horsepower and 390 lb-ft of torque at the crank. This data serves as a reference point for measuring the effects of the cam upgrade.
Post-Upgrade Power Output
After the installation of the performance camshaft, the engine was re-tested on the dyno. The results showed a remarkable increase in power:
- Peak horsepower increased to 400
- Peak torque increased to 420 lb-ft
Torque Curves
The torque curves revealed that the cam upgrade improved low-end torque while enhancing mid-range power. This characteristic makes the vehicle more responsive during everyday driving conditions.
Additional Modifications to Consider
While a camshaft upgrade can yield significant power gains, pairing it with other modifications can further enhance performance. Consider the following:
- Cold air intake systems
- High-performance headers
- Upgraded exhaust systems
- ECU tuning for optimal performance
Conclusion
A camshaft upgrade on a 5.7 HEMI engine can lead to substantial power gains, as demonstrated by real-world dyno results. With careful selection of the camshaft and consideration of additional modifications, enthusiasts can unlock the full potential of their engines, resulting in improved performance and driving enjoyment.