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The Pontiac 400 engine is a classic powerhouse known for its performance and reliability. Many enthusiasts seek to enhance its capabilities through various modifications. One of the most impactful upgrades is the camshaft swap. In this article, we will explore real-world results from a custom cam swap using Comp Cams, focusing on the performance gains and overall experience.
Understanding the Pontiac 400 Engine
The Pontiac 400 engine was produced from 1967 to 1979 and is renowned for its torque and horsepower. It features a cast-iron block and heads, making it robust and capable of handling modifications. The engine’s design allows for significant performance enhancements, particularly through camshaft changes.
Why Upgrade the Camshaft?
Upgrading the camshaft is one of the most effective ways to increase an engine’s performance. The camshaft controls the timing and duration of the engine’s valve openings, which directly affects airflow and power output. A custom camshaft can optimize these parameters for improved performance in specific driving conditions.
Benefits of a Custom Cam Swap
- Increased horsepower and torque
- Improved throttle response
- Enhanced engine sound
- Better overall drivability
Choosing Comp Cams for the Upgrade
Comp Cams is a well-respected brand in the performance camshaft industry. They offer a wide range of camshafts tailored for various applications. For the Pontiac 400, selecting the right cam profile is crucial to achieving the desired performance outcomes.
Factors to Consider When Selecting a Cam
- Engine specifications (compression ratio, cylinder heads)
- Intended use (street, strip, or track)
- Desired power band and RPM range
- Compatibility with other engine modifications
Real-World Results from the Cam Swap
After installing a Comp Cams custom camshaft in a Pontiac 400 engine, the results were impressive. The engine experienced significant performance improvements, which were measured on the dyno and felt on the road.
Dyno Results
The dyno tests showed a remarkable increase in horsepower and torque across the RPM range. The following are the key figures:
- Before cam swap: 320 horsepower, 400 lb-ft torque
- After cam swap: 370 horsepower, 450 lb-ft torque
On-Road Performance
Drivers reported a noticeable difference in throttle response, particularly during acceleration. The engine felt more alive, and the power delivery was smoother. The enhanced sound of the engine also added to the overall driving experience.
Installation Process
Installing a new camshaft requires careful attention to detail. Here’s a brief overview of the installation process:
- Remove the old camshaft and timing cover
- Clean the engine components thoroughly
- Install the new camshaft with proper lubrication
- Reassemble the timing cover and other components
- Set the ignition timing and adjust the carburetor if necessary
Conclusion
The Comp Cams custom cam swap for the Pontiac 400 engine demonstrates the significant performance gains achievable through careful modifications. With increased horsepower, improved throttle response, and a more engaging driving experience, this upgrade is a worthwhile investment for any Pontiac enthusiast looking to enhance their engine’s capabilities.
Whether you’re a seasoned mechanic or a first-time modifier, the process of upgrading your camshaft can be rewarding. With the right parts and proper installation, your Pontiac 400 can transform into a more powerful and enjoyable machine.