Technical Deep Dive: Flow Testing and Power Results with Arh 6.4 Hemi Headers and Tune

by

The automotive performance industry is constantly evolving, with enthusiasts always seeking ways to maximize the power and efficiency of their vehicles. One of the most effective upgrades for improving engine performance is the installation of aftermarket headers. In this article, we will conduct a technical deep dive into the flow testing and power results associated with the ARH 6.4 HEMI headers and tune.

Understanding Headers and Their Impact on Performance

Headers are crucial components in an engine’s exhaust system. They replace the factory exhaust manifolds, allowing for improved exhaust flow, which can lead to significant power gains. The ARH (American Racing Headers) 6.4 HEMI headers are designed specifically for the Chrysler 6.4-liter HEMI engine, offering enhanced performance through better exhaust scavenging.

How Headers Work

Headers work by reducing back pressure and improving the exit of exhaust gases from the engine. This is achieved through:

  • Longer tube lengths that promote better scavenging.
  • Larger diameter pipes that reduce restrictions.
  • Optimized collector designs that improve flow efficiency.

Flow Testing Methodology

To assess the performance of the ARH 6.4 HEMI headers, we conducted a series of flow tests. These tests were designed to measure the airflow through the headers at various RPM levels, providing a comprehensive understanding of their capabilities.

Testing Setup

The testing setup included:

  • A flow bench calibrated for precision measurements.
  • The ARH 6.4 HEMI headers installed on a test engine.
  • A data acquisition system to record flow rates and pressure differentials.

Flow Test Results

The flow tests revealed impressive results across the RPM range. The ARH headers consistently outperformed the stock manifolds, particularly at higher RPMs.

  • At 3000 RPM, the ARH headers showed a flow increase of 15% over stock.
  • At 5000 RPM, the increase rose to 25%.
  • At peak RPM, the headers provided a remarkable 30% improvement in flow efficiency.

Power Results with Tune

In addition to flow testing, we evaluated the power gains achieved with the installation of the ARH headers and a corresponding tune. Tuning is essential to optimize the engine’s air-fuel mixture and ignition timing, allowing it to take full advantage of the increased airflow.

Dyno Testing Procedure

The dyno testing procedure involved:

  • Baseline runs with the stock exhaust system.
  • Installation of the ARH headers.
  • Re-tuning the engine using a performance ECU.
  • Final runs to measure power output.

Power Gains Observed

The results from the dyno testing were impressive, showcasing the effectiveness of the ARH headers combined with the performance tune:

  • Baseline power output: 420 horsepower.
  • Power output with ARH headers and tune: 470 horsepower.
  • Overall power gain: 50 horsepower.

Conclusion

The ARH 6.4 HEMI headers, when paired with an appropriate tune, deliver significant improvements in both airflow and power output. With a 30% increase in flow efficiency and a substantial 50 horsepower gain on the dyno, these headers represent a valuable upgrade for any 6.4 HEMI enthusiast looking to enhance their vehicle’s performance.

Investing in quality headers like those from ARH not only maximizes performance but also contributes to a more exhilarating driving experience. As the automotive landscape continues to evolve, upgrades like these remain essential for enthusiasts aiming to push the limits of their vehicles.