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The 5.7 HEMI engine has gained popularity among car enthusiasts for its power and performance. When combined with aftermarket components like Hedman Headers, the potential for increased horsepower becomes significant. In this article, we will explore the power testing results of a 5.7 HEMI engine equipped with Hedman Headers, showcasing the journey from stock performance to achieving over 520 horsepower.
Understanding the 5.7 HEMI Engine
The 5.7 HEMI engine, part of Chrysler’s HEMI family, is known for its distinctive hemispherical combustion chamber design, which enhances airflow and combustion efficiency. This engine is commonly found in various Dodge and Chrysler vehicles, making it a popular choice for performance upgrades.
Stock Performance of the 5.7 HEMI
Before modifications, the stock 5.7 HEMI engine produces approximately 360 horsepower and 390 lb-ft of torque. While these numbers are impressive for a factory engine, many enthusiasts seek to push the limits further.
Upgrading with Hedman Headers
Hedman Headers are designed to improve exhaust flow, which can lead to significant power gains. By replacing the factory exhaust manifolds with Hedman Headers, the engine can expel exhaust gases more efficiently, reducing back pressure and increasing horsepower.
Installation Process
The installation of Hedman Headers on a 5.7 HEMI involves several steps:
- Disconnect the battery and remove any necessary components to access the exhaust manifolds.
- Remove the stock exhaust manifolds and gaskets.
- Install the Hedman Headers with new gaskets, ensuring a secure fit.
- Reassemble any components that were removed during the process.
- Reconnect the battery and start the engine to check for leaks.
Power Testing Results
After installing the Hedman Headers, the 5.7 HEMI was taken to a dynamometer for power testing. The results were impressive, showcasing a significant increase in horsepower compared to the stock configuration.
Before and After Comparisons
Here are the power figures recorded during testing:
- Stock 5.7 HEMI: 360 horsepower and 390 lb-ft of torque.
- 5.7 HEMI with Hedman Headers: 520 horsepower and 485 lb-ft of torque.
The addition of Hedman Headers resulted in a remarkable increase of 160 horsepower, demonstrating the effectiveness of this upgrade.
Additional Modifications for Maximum Performance
While Hedman Headers provide substantial gains, further enhancements can push the 5.7 HEMI’s performance even higher. Consider the following modifications:
- High-performance intake systems to improve airflow.
- Upgraded camshafts for better valve timing and lift.
- ECU tuning to optimize fuel and ignition settings.
- Performance exhaust systems to complement the headers.
Conclusion
Power testing the 5.7 HEMI with Hedman Headers has shown that significant horsepower gains are achievable with the right modifications. From a stock configuration of 360 horsepower to an impressive 520 horsepower, the results speak for themselves. For enthusiasts looking to enhance their HEMI engines, Hedman Headers represent a valuable investment in performance.