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The Chevy 350 engine has long been a favorite among car enthusiasts and performance builders alike. Known for its versatility and potential for power, the 350 is often the starting point for many builds. In this article, we will explore the real-world results of achieving 350 horsepower using the Comp Cams XE270HR camshaft on a stock Chevy 350 engine.
Understanding the Chevy 350 Engine
The Chevy 350 is a small-block V8 engine that has been in production since 1967. It has a displacement of 350 cubic inches (5.7 liters) and is known for its robust design and ease of modification. The engine is commonly found in a variety of GM vehicles, including trucks, cars, and performance models.
Key Specifications of the Chevy 350
- Displacement: 350 cubic inches (5.7L)
- Bore x Stroke: 4.00 in x 3.48 in
- Compression Ratio: Typically 8.5:1 to 9.0:1
- Stock Horsepower: Approximately 145-250 hp (depending on the model year)
Introducing Comp Cams XE270HR
The Comp Cams XE270HR is a high-performance camshaft designed for small-block Chevy engines. It is known for its ability to provide a significant boost in horsepower and torque while maintaining a smooth idle. The XE270HR camshaft features a unique design that enhances airflow and improves engine efficiency.
Specifications of the XE270HR Camshaft
- Duration at .050: 224° intake / 230° exhaust
- Lift: .480 in intake / .480 in exhaust
- LSA (Lobe Separation Angle): 110°
- Recommended RPM Range: 2,000 to 6,500 RPM
Installation Process
Installing the XE270HR camshaft in a stock Chevy 350 involves several steps. It is important to have the right tools and a basic understanding of engine assembly. Below is a general overview of the installation process.
Tools Required
- Socket set
- Torque wrench
- Camshaft installation tool
- Engine oil
Steps to Install the XE270HR Camshaft
- Remove the valve covers and intake manifold.
- Remove the stock camshaft and lifters.
- Clean the camshaft journals and ensure proper lubrication.
- Install the XE270HR camshaft using a camshaft installation tool.
- Reinstall the lifters and adjust the valve train.
- Reassemble the intake manifold and valve covers.
Performance Results
After installing the Comp Cams XE270HR camshaft on a stock Chevy 350, we conducted a series of tests to measure the performance gains. The results were impressive, showcasing the potential of this camshaft in a relatively untouched engine.
Dyno Testing Results
- Peak Horsepower: 350 hp at 5,800 RPM
- Peak Torque: 400 lb-ft at 4,500 RPM
- Idle Quality: Smooth with a slight lope
Comparative Analysis
To understand the impact of the XE270HR camshaft, we compared the performance results with a stock Chevy 350 engine without any modifications. The differences were significant and highlighted the advantages of upgrading the camshaft.
Stock vs. Modified Performance
- Stock Horsepower: Approximately 250 hp
- Modified Horsepower: 350 hp
- Stock Torque: Approximately 350 lb-ft
- Modified Torque: 400 lb-ft
Conclusion
The installation of the Comp Cams XE270HR camshaft on a stock Chevy 350 engine resulted in a remarkable increase in horsepower and torque. Achieving 350 hp is a testament to the effectiveness of this camshaft and its ability to transform a standard engine into a powerful performance machine. For enthusiasts looking to enhance their Chevy 350, the XE270HR is an excellent choice that delivers real-world results.