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In the world of performance engines, the debate between LS and HEMI configurations continues to be a hot topic among enthusiasts. This article delves into a performance analysis of building a 550 horsepower LS engine equipped with an LS7 cam and Fast 102 intake, compared to a HEMI engine paired with an Edelbrock supercharger.
Overview of the LS and HEMI Engines
The LS engine family, known for its lightweight design and high-revving capabilities, has gained immense popularity in the performance community. The HEMI, with its distinctive hemispherical combustion chamber, offers unique advantages in power delivery and torque. Understanding the specifications and capabilities of both engines is essential for a fair comparison.
LS Engine Specifications
- Engine Type: V8
- Displacement: 5.7L to 7.0L
- Power Output: Varies by configuration, up to 650 hp with modifications
- Torque: High torque at low RPMs
HEMI Engine Specifications
- Engine Type: V8
- Displacement: 5.7L to 6.4L
- Power Output: Varies by configuration, up to 800 hp with supercharging
- Torque: Strong mid-range torque
Building the 550 HP LS Engine
To achieve 550 horsepower from an LS engine, specific components and modifications are essential. The LS7 cam and Fast 102 intake manifold are critical in maximizing airflow and performance.
Key Components for LS Build
- LS7 Camshaft: Designed for high RPMs, improving valve timing and lift.
- Fast 102 Intake: Increases airflow and enhances throttle response.
- High-Performance Headers: Reduces exhaust back pressure.
- ECU Tuning: Optimizes fuel mapping and ignition timing.
Building the HEMI with Edelbrock Supercharger
The HEMI engine can also achieve impressive horsepower numbers, especially when paired with an Edelbrock supercharger. This setup enhances the engine’s forced induction capabilities, providing significant power gains.
Key Components for HEMI Build
- Edelbrock Supercharger: Increases air intake and boosts power significantly.
- High-Performance Camshaft: Enhances engine breathing and performance.
- Cold Air Intake: Improves air density for better combustion.
- ECU Tuning: Essential for managing increased airflow and fuel delivery.
Performance Comparison
Now that we have established the builds for both the LS and HEMI engines, it’s time to compare their performance metrics. Factors such as horsepower, torque, and overall drivability will be analyzed.
Horsepower and Torque
- LS Engine: 550 hp and approximately 500 lb-ft of torque.
- HEMI Engine: 650 hp and around 600 lb-ft of torque with supercharger.
Drivability and Performance Characteristics
The LS engine, while slightly lower in torque, provides a linear power band that is ideal for high RPM performance. The HEMI, on the other hand, delivers robust low-end torque, making it feel powerful during acceleration.
Cost Considerations
When building a performance engine, cost is always a consideration. The price of components and labor can significantly impact the overall investment. Below is a breakdown of estimated costs for each build.
Estimated Costs for LS Build
- LS7 Camshaft: $1,200
- Fast 102 Intake: $800
- Headers: $600
- ECU Tuning: $500
- Total Estimated Cost: $3,100
Estimated Costs for HEMI Build
- Edelbrock Supercharger: $5,000
- Performance Camshaft: $1,000
- Cold Air Intake: $300
- ECU Tuning: $500
- Total Estimated Cost: $6,800
Conclusion
Both the LS engine with LS7 cam and Fast 102 intake, and the HEMI with Edelbrock supercharger offer unique advantages and performance characteristics. The choice between the two ultimately depends on individual preferences regarding power delivery, cost, and intended use. Each engine has the potential to provide exhilarating performance on the road or track.