How Much Horsepower Will A Cam Add

How Much Horsepower Will a Camshaft Add?

Adding a performance camshaft is a popular modification among car enthusiasts looking to boost their engine's power. But the question many ask is: how much horsepower will a cam add? The answer, unfortunately, isn't a simple number. The horsepower gain from a camshaft swap depends on several interconnected factors. Let's delve into the details.

Factors Affecting Horsepower Gains from a Camshaft

Several crucial elements determine the ultimate horsepower increase you'll see after installing a new camshaft. These include:

1. The Camshaft Itself:

• Duration: This refers to how long the valves stay open. Longer duration cams generally allow for more airflow, leading to higher potential horsepower at higher RPMs. However, this often comes at the cost of low-end torque.
• Lift: This measures how far the valves lift from their seats. Greater lift usually translates to more airflow and, consequently, more power. Again, this often impacts low-end performance.
• Lobe Separation Angle (LSA): This influences the overlap between the intake and exhaust valve opening. Different LSAs affect power delivery and engine characteristics. A tighter LSA generally improves low-end torque but can restrict high-end power. Conversely, a wider LSA typically favors high-end horsepower at the expense of low-end torque.
• Cam Profile: The shape of the cam lobe directly impacts the valve lift profile, determining how aggressively the valves open and close. Different profiles are optimized for different RPM ranges and driving styles.

2. Your Engine and Vehicle:

• Engine Type: The inherent design of your engine significantly influences the potential gains from a camshaft upgrade. Naturally aspirated engines will respond differently than forced induction (turbocharged or supercharged) engines.
• Existing Modifications: Other modifications, such as headers, exhaust systems, intake manifolds, and engine tuning, can dramatically influence how much power a new camshaft adds. A camshaft upgrade is often just one piece of a larger performance puzzle.
• Engine Condition: A well-maintained engine will see greater gains than one with worn components.

3. Installation and Tuning:

• Proper Installation: Incorrect installation can lead to poor performance or even engine damage. Professional installation is highly recommended, particularly for more aggressive camshaft profiles.
• Engine Tuning: After installing a new camshaft, engine tuning (via a reprogrammable ECU or professional dyno tuning) is often crucial to optimize the engine's performance and ensure reliable operation. This is where you truly unlock the camshaft's potential.

Realistic Expectations

Instead of focusing on a specific horsepower number, consider these realistic expectations:

• Moderate Gains: For a street-driven vehicle with moderate camshaft upgrades, you might see gains in the range of 10-30 horsepower. This is often accompanied by a noticeable improvement in throttle response and higher RPM performance.
• Significant Gains: More aggressive camshafts paired with supporting modifications and professional tuning can yield considerably higher gains – 50 horsepower or more – but often come with trade-offs in drivability, especially at lower RPMs. These are more commonly found in dedicated performance vehicles.

Conclusion

The question of "how much horsepower will a cam add" simply doesn't have a one-size-fits-all answer. The increase depends heavily on several intertwined factors. Careful consideration of these factors and realistic expectations are crucial for maximizing the benefits of a camshaft upgrade without compromising your engine's reliability and overall driving experience. Always research camshaft options specific to your vehicle and consult with experienced professionals for guidance and installation.