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The .7 HEMI cam upgrade has become a popular topic among automotive enthusiasts, especially for those looking to enhance the performance of their vehicles. In this article, we will explore the differences between the stock cam and the .7 HEMI cam upgrade, focusing on power gains and drivability.
Understanding the HEMI Engine
The HEMI engine is known for its unique design and powerful performance. It features hemispherical combustion chambers, which allow for better airflow and more efficient combustion. This design contributes significantly to the engine’s overall power output and efficiency.
Stock Cam Specifications
The stock cam in a HEMI engine is designed for a balance of performance and drivability. It provides adequate power while ensuring smooth operation across a range of driving conditions. Key specifications of the stock cam include:
- Lift: 0.450 inches
- Duration: 204 degrees
- Overlap: 30 degrees
.7 HEMI Cam Upgrade Specifications
The .7 HEMI cam upgrade is designed to maximize performance by increasing lift and duration. This upgrade aims to improve airflow and power output significantly. Key specifications of the .7 HEMI cam include:
- Lift: 0.550 inches
- Duration: 220 degrees
- Overlap: 38 degrees
Power Gains from the .7 HEMI Cam Upgrade
One of the most significant advantages of upgrading to the .7 HEMI cam is the potential for increased horsepower and torque. Many users report substantial gains in both metrics, particularly in the mid to high RPM range.
On average, the .7 HEMI cam upgrade can provide:
- Horsepower gain: 30-50 HP
- Torque gain: 25-40 lb-ft
Drivability Considerations
While the power gains are impressive, it’s essential to consider how the .7 HEMI cam upgrade affects drivability. Some drivers may experience changes in engine behavior and responsiveness, which can be both positive and negative.
Positive Changes
Many users find that the upgrade enhances throttle response and overall engine performance. The increased lift and duration can lead to a more aggressive power band, making the vehicle feel more responsive during acceleration.
Negative Changes
Conversely, some drivers may notice a decrease in low-end torque, which can affect drivability in everyday situations. The engine may feel less responsive at lower RPMs, making it less suitable for stop-and-go traffic.
Installation and Tuning
Installing the .7 HEMI cam upgrade requires careful consideration and expertise. It is recommended to have the upgrade performed by a professional mechanic familiar with HEMI engines. Additionally, proper tuning is crucial to optimize performance and drivability.
- Camshaft installation
- Adjusting valve timing
- Reprogramming the engine control unit (ECU)
Conclusion
The .7 HEMI cam upgrade offers significant power gains, making it an attractive option for performance enthusiasts. However, potential changes in drivability must be considered. Proper installation and tuning are essential to ensure the best results from this upgrade.
Ultimately, whether the .7 HEMI cam upgrade is worth it depends on individual driving preferences and performance goals. For those seeking a more aggressive driving experience, the upgrade may provide the perfect balance of power and excitement.