Building a 700 Hp Chevy Ls Swap: Choosing the Right Camshaft and Exhaust System for Max Power

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Building a powerful 700 HP Chevy LS swap requires careful consideration of various components, particularly the camshaft and exhaust system. These elements play a crucial role in maximizing engine performance and ensuring optimal power delivery. In this article, we will explore the factors to consider when selecting the right camshaft and exhaust system for your LS swap.

Understanding Camshaft Selection

The camshaft is one of the most critical components in an engine build, as it controls the timing and duration of the engine’s valves. Choosing the right camshaft for a 700 HP LS swap involves understanding the engine’s intended use, desired power band, and overall performance goals.

Factors to Consider

  • Engine Displacement: The size of the engine affects the choice of camshaft. Larger displacements may require different cam profiles.
  • Intended Use: Street, track, or off-road applications will dictate the camshaft specifications.
  • Power Band: Determine the RPM range where you want maximum power. This will influence the lift and duration of the camshaft.
  • Valve Train Compatibility: Ensure the camshaft is compatible with your valve train components, including lifters and pushrods.
  • Fuel Type: The choice between pump gas and race fuel can affect camshaft selection due to different octane requirements.

Choosing the Right Camshaft Profile

Once you have considered the factors above, it’s time to delve into specific camshaft profiles. Camshaft profiles are typically defined by their lift, duration, and lobe separation angle.

Lift and Duration

Lift refers to how far the valve opens, while duration measures how long the valve stays open. For a 700 HP LS swap, you will generally want a camshaft with:

  • Lift: Typically in the range of 0.600 to 0.700 inches.
  • Duration: Around 230 to 260 degrees at 0.050 inches lift.

Lobe Separation Angle

The lobe separation angle (LSA) affects the engine’s idle quality and power band. A tighter LSA (e.g., 110 degrees) can provide more low-end torque, while a wider LSA (e.g., 114 degrees) may enhance high-end power. For a 700 HP build, an LSA between 112 and 114 degrees is often ideal.

Exhaust System Selection

The exhaust system is another vital aspect of maximizing power in an LS swap. A well-designed exhaust system can improve exhaust flow, reduce back pressure, and enhance the overall efficiency of the engine.

Key Components of an Exhaust System

  • Headers: Long-tube headers are generally preferred for high-performance builds, as they provide better flow and scavenging.
  • Collector Size: Larger collectors can help improve exhaust flow, but be cautious of going too large, which may hurt mid-range torque.
  • Pipe Diameter: A 3-inch diameter is commonly used for 700 HP builds to ensure adequate flow without restriction.
  • Mufflers: Choose mufflers that balance sound and performance. Straight-through designs typically offer the best flow.

Exhaust System Design Considerations

When designing your exhaust system, consider the following:

  • Routing: Ensure the exhaust has a clear path to minimize bends and restrictions.
  • Material: Stainless steel is preferred for durability and resistance to corrosion.
  • Mounting: Proper mounting is essential to avoid vibrations and ensure longevity.

Tuning for Maximum Performance

After selecting the right camshaft and exhaust system, tuning the engine is crucial to achieving maximum performance. A professional tune can help optimize fuel delivery, ignition timing, and other parameters to ensure your 700 HP LS swap runs efficiently.

Benefits of Professional Tuning

  • Improved Power Output: A proper tune can unlock additional horsepower and torque.
  • Better Fuel Economy: Optimizing the air-fuel mixture can lead to improved fuel efficiency.
  • Enhanced Reliability: Tuning can help prevent engine knock and other issues that may arise from improper settings.

Conclusion

Building a 700 HP Chevy LS swap requires careful attention to the camshaft and exhaust system. By understanding the factors that influence your choices and selecting components that work harmoniously together, you can achieve the desired power and performance. Remember that tuning is the final step to ensure your build runs at its best, making it a rewarding experience for any enthusiast.