Discover how an EGR delete can improve fuel efficiency and horsepower in diesel engines. Learn real-world test results on MPG gains and performance enhancements from EGR removal.
What is the EGR System and How Does It Work?
The EGR system is an emissions control technology that reduces NOx (nitrogen oxide) emissions in diesel engines. By recirculating a portion of the engine's exhaust gases back into the combustion chamber, the EGR system lowers combustion temperatures, which reduces the formation of NOx. However, this process also leads to less efficient combustion, which can affect engine performance over time.
EGR System's Purpose:
· Emissions Reduction: The primary function of the EGR system is to reduce NOx emissions, which are harmful pollutants.
· Fuel Economy Impact: While the EGR helps with emissions control, it can reduce fuel efficiency by introducing exhaust gases into the combustion process, leading to incomplete combustion.
Common Issues with EGR:
EGR systems can become clogged with soot and carbon buildup, reducing engine performance and efficiency. This can result in:
· Decreased fuel economy.
· Poor engine performance.
· Increased exhaust temperatures.
The Impact of EGR Deletion on MPG
How EGR Deletion Improves Fuel Economy
When you delete the EGR system, the engine no longer recirculates exhaust gases. This means only clean, fresh air enters the combustion chamber, allowing for more efficient combustion. With improved combustion, the engine burns fuel more efficiently, resulting in better fuel economy.
Real-World Data: User Test Results on MPG Improvement
In a practical test conducted by a diesel truck owner, after performing an EGR delete alongside other modifications, the vehicle saw a significant improvement in fuel economy. The test was conducted on a 2016 Ram 2500HD with the following modifications:
· K&N Air Filter
Test Results:
· Before modification: 15-16 MPG.
· After modification: 19-22 MPG.
This real-world data showcases a clear MPG improvement, particularly on highways where the truck achieved 25-28 MPG.
For a detailed look at the test, including speed variations, road conditions, and the sound changes in the vehicle, you can refer to the YouTube video where the user has shared the full test results and experience: Watch the video here.
Note: This video is used under fair use for educational and informational purposes, with attribution to the original creator. All content in the video belongs to the creator, and we encourage viewers to watch the full video for an in-depth understanding of the test process and results.
Factors Affecting MPG Post-Modification:
While the EGR delete improved fuel economy in this case, several other factors influence the final result, including:
· Driving habits: Speeding, hard acceleration, and braking can reduce fuel economy.
· Vehicle load: Hauling heavy loads or towing increases fuel consumption.
· Weather conditions: Cold weather can reduce MPG due to the engine working harder to warm up.
The Impact of EGR Deletion on Horsepower
Theoretical Explanation: How EGR Deletion Increases Horsepower
The EGR system dilutes the air-fuel mixture by introducing exhaust gases into the combustion chamber. This reduces combustion efficiency, leading to a slight decrease in power output. Deleting the EGR system removes this dilution, allowing for a more efficient burn of fuel and increasing engine power.
Performance Data and Power Gains
While the test data discussed in the previous section didn't directly measure horsepower, improvements in fuel economy often correlate with more efficient combustion and thus more power. Many truck owners report feeling a noticeable increase in engine responsiveness and acceleration after performing an EGR delete.
On average, EGR deletes in combination with other performance upgrades can result in a 10%-20% increase in power depending on the engine and additional modifications, such as diesel delete kits or EFI live tunes.
EGR Deletion and Power Delivery:
By improving combustion efficiency, the engine can produce more power without increasing fuel consumption. This is especially noticeable when the vehicle is under load, such as during towing or high-speed driving.
Other Impacts and Considerations of EGR Deletion
Noise Changes After EGR Deletion
While many owners report no significant increase in cabin noise, the external noise may be noticeably louder, especially at higher speeds. The engine may emit a distinct sound due to changes in the exhaust flow. It's something to keep in mind, especially if you're used to a quieter driving experience.
Impact on the Exhaust System
After EGR deletion, the exhaust temperature may rise, which can stress your exhaust system and other components such as the turbocharger and intercooler. If you are considering an EGR delete, it's essential to ensure that your vehicle's exhaust system can handle the increased heat.
Recommended Upgrades:
· High-performance exhaust systems to withstand increased temperatures.
· Turbocharger upgrades to ensure consistent performance.
Maintaining the Turbocharger Post-Deletion
Turbochargers are crucial to a diesel engine's performance. After performing an EGR delete, regular maintenance becomes even more important. Users have reported needing to replace parts like the turbo actuator after extended use. Ensuring that your turbo system is properly maintained will prevent costly repairs down the line.
Conclusion
Is EGR Deletion Worth It?
Based on the data and user reports, EGR deletion can significantly improve MPG and horsepower, making it a worthwhile modification for many diesel truck owners. However, before proceeding, here are a few key factors to consider:
1. Environmental Regulations: EGR deletes increased emissions, potentially violating local environmental laws. In regions with strict emissions standards, it’s crucial to ensure that your vehicle can still pass emissions tests.
2. Long-Term Effects: While the EGR delete improves fuel efficiency and power in the short term, the long-term impact on engine components (especially the exhaust system and turbocharger) should be closely monitored.
3. Vehicle Type and Usage: If you frequently tow or drive at high speeds, EGR deletion may provide noticeable benefits. However, for everyday city driving, the benefits may be less significant.
Maintenance Recommendations
· Regular System Checks: Ensure that your exhaust system, cooling system, and turbocharger are maintained regularly to avoid any issues that may arise from higher exhaust temperatures.
· Legal Compliance: Always check your local emission regulations to ensure that EGR deletion will not affect your vehicle’s legality.
EGR deletion is an effective way to increase fuel economy and horsepower for diesel truck owners, especially those who drive long distances or frequently haul loads. While it offers significant performance benefits, it's essential to weigh the potential legal and maintenance considerations before deciding to modify your vehicle.
FAQs
Q1: What is an EGR delete and how does it work?
A1: An EGR (Exhaust Gas Recirculation) delete involves removing the EGR system from a diesel engine. It prevents exhaust gases from being recirculated into the combustion chamber, improving engine efficiency.
Q2: Does an EGR delete really improve MPG in diesel trucks?
A2: Yes, deleting the EGR can improve fuel economy by allowing for more efficient combustion. Without exhaust gases being recirculated, the engine burns fuel more effectively, often leading to MPG improvements.
Q3: How much MPG can I expect to gain with an EGR delete?
A3: MPG improvements vary, but many diesel truck owners report increases of 3-7 MPG, with some achieving up to 10-12 MPG higher depending on driving conditions and other modifications.
Q4: Will an EGR delete increase the horsepower in my diesel truck?
A4: Yes, an EGR delete can increase horsepower by improving combustion efficiency. This leads to better engine performance, with many users reporting noticeable gains in power, especially during heavy loads or towing.
Q5: Are there any downsides to doing an EGR delete?
A5: While an EGR delete can improve performance, it may increase emissions and potentially violate local emissions laws. It can also cause higher exhaust temperatures, which may affect other engine components over time.
Q6: Can I legally delete my EGR system?
A6: EGR deletion is illegal in some regions with strict emissions regulations, especially in the U.S. and Canada. Always check your local laws before proceeding with this modification to ensure compliance.
Q7: Do I need any other modifications to benefit from an EGR delete?
A7: While an EGR delete can improve performance on its own, combining it with other modifications such as a cold air intake, EFI live tuning, or a high-flow exhaust can further enhance power and fuel efficiency.
Q8: Will my truck sound different after an EGR delete?
A8: Yes, after an EGR delete, you may notice a slight increase in engine noise, especially from the exhaust. However, the sound is typically more noticeable from outside the truck, with minimal change inside the cabin.
Q9: How much does an EGR delete kit cost?
A9: The cost of an EGR delete kit typically ranges from $150 to $500 depending on the make and model of your truck. Professional installation costs can add another $200 to $500.
Q10: How long does it take to install an EGR delete?
A10: The installation of an EGR delete typically takes between 2-4 hours, depending on the complexity of your vehicle and whether you’re doing it yourself or hiring a professional mechanic.
