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The performance of HEMI engines has long been a topic of interest among automotive enthusiasts. In this article, we will compare the stock HEMI engine’s performance with that of a HEMI engine that has undergone a MDS (Multi-Displacement System) delete. We will focus specifically on 0-60 speeds and quarter-mile times, two critical metrics for assessing vehicle performance.
Understanding the HEMI Engine and MDS
The HEMI engine, known for its hemispherical combustion chamber design, has been a staple in the Chrysler lineup for decades. The introduction of the MDS technology was aimed at improving fuel efficiency by deactivating half of the engine’s cylinders under light load conditions. While this system can enhance fuel economy, it may also impact performance metrics like acceleration and quarter-mile times.
Stock HEMI Performance
The stock HEMI engine, depending on the model year and configuration, typically produces between 370 and 485 horsepower. This power output allows for impressive acceleration and performance figures.
0-60 Speeds
In stock form, the HEMI engine can achieve 0-60 mph times ranging from approximately 4.5 to 6 seconds, depending on the vehicle’s weight, drivetrain configuration, and tire choice.
Quarter Mile Times
Quarter-mile performance for a stock HEMI-equipped vehicle typically falls between 12.5 and 14 seconds. This variance is influenced by similar factors as the 0-60 times.
MDS Delete HEMI Performance
When the MDS is deleted from a HEMI engine, the vehicle is expected to perform differently. Many enthusiasts opt for this modification to maximize power and responsiveness, especially under full throttle conditions.
0-60 Speeds
With the MDS delete, 0-60 mph times can improve, typically falling in the range of 4.0 to 5.5 seconds. This improvement is largely due to the engine’s ability to deliver full power at all times, without the interruption of cylinder deactivation.
Quarter Mile Times
Quarter-mile times for HEMIs with the MDS delete can also show significant improvement, often reaching times between 11.5 and 13.5 seconds. This enhancement in performance is a result of better throttle response and increased power delivery.
Performance Comparison
Now that we have established the performance metrics for both stock and MDS delete HEMIs, let’s summarize the findings.
- 0-60 mph Times: Stock: 4.5 – 6 seconds; MDS Delete: 4.0 – 5.5 seconds
- Quarter Mile Times: Stock: 12.5 – 14 seconds; MDS Delete: 11.5 – 13.5 seconds
Factors Affecting Performance
Several factors can influence the performance of both stock and MDS delete HEMI engines. These include:
- Vehicle Weight: Lighter vehicles generally achieve better acceleration.
- Tire Choice: High-performance tires can significantly enhance grip and reduce 0-60 times.
- Transmission Type: Automatic vs. manual transmission can affect shifting speed and performance.
- Weather Conditions: Temperature and humidity can impact engine performance and traction.
Conclusion
In conclusion, the comparison between stock and MDS delete HEMI engines reveals notable differences in performance metrics. While stock HEMIs deliver impressive acceleration and quarter-mile times, those with an MDS delete show enhanced performance characteristics. Ultimately, the choice between the two will depend on the driver’s priorities—whether they value fuel efficiency or maximum performance.