Table of Contents
The Pontiac 400 engine has long been revered among car enthusiasts for its power and performance. When considering modifications for a street build, the choice of camshaft plays a crucial role in achieving the desired balance of horsepower and drivability. This article delves into the cost and performance analysis of using the Comp Cams XE268H camshaft in a Pontiac 400 engine.
Understanding the Pontiac 400 Engine
The Pontiac 400 was produced from 1967 to 1979 and is known for its robust design and high torque output. This engine is a favorite among classic car restorers and performance enthusiasts alike. Key specifications include:
- Displacement: 400 cubic inches
- Power Output: 350-370 horsepower (varies by year and configuration)
- Torque: 400-450 lb-ft
Choosing the Right Camshaft
When modifying a Pontiac 400 for street use, selecting the right camshaft is essential for optimizing performance. The Comp Cams XE268H is a popular choice due to its balance of performance and drivability. Key features of the XE268H include:
- Advertised Duration: 268° intake / 280° exhaust
- Lift: .480” intake / .480” exhaust
- Lobe Separation Angle: 110°
Cost Analysis of Comp Cams XE268H
The cost of the Comp Cams XE268H camshaft can vary based on the supplier and additional components needed for installation. Here’s a breakdown of potential costs:
- Camshaft: $250 – $300
- Camshaft Installation Kit: $100 – $150
- Valve Springs: $150 – $200
- Labor (if applicable): $300 – $500
In total, the cost of installing the XE268H camshaft in a Pontiac 400 can range from $800 to $1,150, depending on whether you choose to do the work yourself or hire a professional.
Performance Gains with Comp Cams XE268H
Upgrading to the Comp Cams XE268H camshaft can significantly enhance the performance of a Pontiac 400 engine. Expected performance gains include:
- Increased Horsepower: 20 – 30 HP increase over stock
- Improved Torque: Enhanced low to mid-range torque
- Better Throttle Response: More aggressive cam profile improves acceleration
These performance improvements make the XE268H a strong contender for street builds where both power and drivability are important.
Installation Considerations
Installing the Comp Cams XE268H camshaft requires careful consideration of several factors to ensure optimal performance:
- Compatible Valve Springs: Ensure valve springs can handle the lift and duration of the new camshaft.
- Adjustable Rockers: Consider upgrading to adjustable rockers for better tuning options.
- Proper Timing: Ensure the timing chain and gears are in good condition and correctly set.
Taking these factors into account will help avoid potential issues and maximize the benefits of the camshaft upgrade.
Real-World Performance Testing
To gauge the effectiveness of the Comp Cams XE268H in a Pontiac 400 street build, real-world performance testing is essential. Here are some results from various builds:
- Test Vehicle: 1970 Pontiac LeMans
- Before Upgrade: 330 HP, 400 lb-ft torque
- After Upgrade: 360 HP, 420 lb-ft torque
Such improvements demonstrate the camshaft’s capability to enhance the performance of the Pontiac 400 engine.
Conclusion
The Comp Cams XE268H camshaft is an excellent choice for Pontiac 400 engine modifications aimed at street performance. With a reasonable cost of installation and noticeable performance gains, it provides a balanced solution for enthusiasts looking to enhance their classic Pontiac. By carefully considering installation requirements and conducting real-world testing, you can unlock the full potential of your Pontiac 400 with the XE268H camshaft.