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The Mopar 440 engine has long been a favorite among automotive enthusiasts, known for its power and performance. In this article, we will delve into performance testing of the Mopar 440, comparing stock and modified versions, and showcasing dyno results that highlight the differences.
Understanding the Mopar 440 Engine
The Mopar 440, also known as the Chrysler 440, is a big-block V8 engine that was produced from 1966 to 1978. It was part of Chrysler’s B engine family and is renowned for its robust design and impressive output. The engine has a displacement of 440 cubic inches and was used in various Chrysler, Dodge, and Plymouth vehicles.
Stock vs Modified Mopar 440
When it comes to performance, the distinction between stock and modified engines is significant. Stock engines are built to factory specifications, whereas modified engines have undergone various enhancements to improve performance. Below, we explore the key differences between these two setups.
Stock Mopar 440 Specifications
The stock Mopar 440 typically features a compression ratio of 10.1:1, producing around 375 horsepower and 480 lb-ft of torque. Key components include:
- Cast iron block
- Cast iron heads
- Single four-barrel carburetor
- Exhaust manifolds
Modified Mopar 440 Specifications
Modified versions of the Mopar 440 can significantly enhance performance through various upgrades. A typical modified engine may achieve:
- Higher compression ratios (up to 12.5:1)
- Aluminum heads
- Aftermarket intake manifold
- High-performance carburetor
- Headers instead of exhaust manifolds
Dyno Testing Methodology
To accurately compare the performance of stock and modified Mopar 440 engines, we conducted dyno tests under controlled conditions. The following methodology was employed:
- Both engines were tested on the same dynamometer.
- Testing was performed at wide-open throttle (WOT).
- Engine temperatures were monitored to ensure consistency.
- Results were recorded for horsepower and torque at various RPMs.
Dyno Results Comparison
The dyno results for the stock and modified Mopar 440 engines reveal stark differences in performance. Below are the findings:
Stock Mopar 440 Results
The stock Mopar 440 engine produced the following results:
- Peak Horsepower: 375 hp at 4,600 RPM
- Peak Torque: 480 lb-ft at 3,200 RPM
Modified Mopar 440 Results
The modified Mopar 440 engine yielded impressive results:
- Peak Horsepower: 525 hp at 5,800 RPM
- Peak Torque: 600 lb-ft at 4,200 RPM
Analysis of Results
The performance testing clearly demonstrates the advantages of modifying the Mopar 440 engine. The modified version not only produces more horsepower but also provides increased torque, which translates to better acceleration and overall performance.
Conclusion
In conclusion, the Mopar 440 engine, whether in stock or modified form, remains a powerful option for automotive enthusiasts. The modifications significantly enhance performance, making it a popular choice for those seeking higher horsepower and torque. Understanding the differences between stock and modified engines is crucial for anyone looking to maximize their vehicle’s potential.