1. Introduction
When upgrading a 6.7 Cummins engine, a common topic of discussion among owners is whether to delete the EGR system or upgrade the intake horn.
The issue of carbon deposits has become increasingly serious, with many owners facing the challenge of effectively solving this problem.
This article will focus on the 2019 RAM 3500 6.7 Cummins, analyzing how upgrading the intake system or deleting the EGR system, or combining both, can help solve the carbon deposit problem. Additionally, we will explore the legality, effects, and pros and cons of each option.
2. Formation of the Carbon Deposit Problem: Causes and Impact
The formation of carbon deposits is primarily due to the working principle of the EGR system. In the 6.7 Cummins engine, the EGR system recirculates some exhaust gases back into the intake system to reduce nitrogen oxide (NOx) emissions.
However, these exhaust gases contain oil vapors, soot, and other contaminants, which gradually accumulate in the intake system, affecting airflow, lowering engine efficiency, and even causing serious engine failures.
For example, many owners of the 2019 RAM 3500 6.7 Cummins have reported an increasing problem of carbon buildup. One forum user shared: "My vehicle showed a noticeable decrease in power, slower engine response, and eventually, due to excessive carbon buildup, the engine was damaged." The root cause of this problem is the carbon deposits generated by the EGR system.
3. SPELAB Solutions Provided
SPELAB offers four solutions for solving the carbon deposit problem in the 2007-2024 6.7 Cummins engines. These include EGR deletion, intake horn upgrades (SPELAB intake horn), a combination of both (EGR deletion + SPELAB intake horn), and EGR deletion + intake manifold upgrade + removal of the heat shield. Below, we will analyze the characteristics, legality, and effectiveness of each option.
3.1 EGR Delete
The EGR delete option can significantly improve the engine's airflow. After deleting the EGR, exhaust gases are no longer mixed into the intake system, and all air entering the combustion chamber is fresh. This not only increases the oxygen content in the air but also improves combustion efficiency, reduces carbon buildup, and boosts power output.
One forum user mentioned: "If you plan to install an intake horn like the Banks Monster Ram, you must also delete the EGR system; otherwise, exhaust gases will spread all over the engine bay." This statement highlights how EGR delete can improve airflow and prevent exhaust issues.
Legality: However, deleting the EGR system may have legal implications. In certain areas, removing the EGR system can cause a vehicle to fail emission tests, potentially resulting in fines. Therefore, when considering EGR deletion, owners must thoroughly check local emission regulations.
SPELAB PRO EGR Delete Kit For 2010-2024 6.7L Cummins Dodge Ram 2500 3500
High Performance 6.7L Cummins EGR Delete Kit
Fits 2010-2024 Ram 2500 and 3500 equipped with the 6.7L Cummins engine
$399.99
Buy Now3.2 Intake Horn Upgrade (SPELAB 6.7 Cummins Intake Horn)
The main purpose of upgrading the SPELAB 6.7 Cummins intake horn is to improve intake efficiency. This unique intake horn reduces intake restrictions, increases airflow velocity, and thereby enhances combustion efficiency and engine power output. This upgrade can be done without deleting the EGR system, allowing owners to maintain the original emission control features.
"I replaced the intake horn with a SPELAB model during my repair, and the throttle response was noticeably faster, and the power output was much smoother," shared one owner, demonstrating the effectiveness of upgrading the intake horn.
Legality: Upgrading the intake horn while retaining the EGR system is completely legal and will not affect emission testing, allowing owners to perform this upgrade with peace of mind.
6.7 Cummins Intake Horn
High Performance Intake Horn for 6.7L Cummins
Enhance airflow and performance for your 6.7L Cummins engine
$589
Buy Now3.3 Combining Both (EGR Deletion + SPELAB 6.7 Cummins Intake Horn)
Combining EGR deletion and the upgrade of the SPELAB intake horn is a popular choice among many truck owners. A common issue for users is sluggish throttle response, poor acceleration, or insufficient power. By deleting the EGR system, the intake system can completely avoid the mixing of exhaust gases, and the SPELAB intake horn improves intake efficiency, reducing intake restrictions, resulting in higher power output and faster throttle response.
One forum user mentioned: "I installed the SPELAB intake horn and deleted the EGR. The throttle response improved a lot, and the power output exceeded my expectations." This combination produces results far beyond the benefits of individual upgrades, essentially creating a 1+1 > 2 effect.
Legality: It is important to note that EGR deletion combined with intake upgrades may not comply with emission regulations in certain regions. Owners must confirm whether such modifications are allowed in their area.
3.4 EGR Delete + Intake Manifold Upgrade + Heat Shield Removal (Best Solution)
Combining EGR deletion, intake manifold upgrades, and heat shield removal is a comprehensive performance enhancement solution. This approach optimizes airflow, reduces exhaust gas recirculation, lowers intake temperatures, and reduces carbon buildup, significantly improving engine performance, fuel efficiency, and durability. By adopting these modifications, owners can enhance performance while also gaining better cooling performance and more efficient combustion.
- Airflow Improvement: After EGR deletion, the air entering the combustion chamber no longer contains exhaust gases, resulting in higher oxygen concentration and more efficient combustion. Airflow increases by 5%-10%.
- Improved Intake Efficiency: Upgrading the intake manifold reduces intake resistance, increases power output by 5%-8%, and improves throttle response.
- Temperature Control Optimization: Removing the heat shield reduces intake temperature by 10-15°C, increasing air density and further enhancing combustion efficiency and power output.
- Fuel Efficiency Improvement: With improved combustion efficiency and reduced exhaust gases, fuel consumption decreases by 5%-8%, especially during highway driving.
- Reduction in Carbon Build-Up and Maintenance Costs: By reducing exhaust gas recirculation and optimizing airflow, carbon buildup in the engine and turbocharger is minimized, extending maintenance intervals by 10%-15%.
SPELAB Intake Horn and Manifold Grid Heater for 6.7 Cummins
2007-2024 Dodge Ram 2500/3500
$667
Buy NowComparison Summary:
| Solution | Performance Boost | Throttle Response | Carbon Buildup Issue | Legality Concerns | Ideal User |
|---|---|---|---|---|---|
| EGR Delete | High | High | Significantly Reduced | May Violate Emissions Regulations | Enthusiasts Seeking Maximum Performance in Areas with Loose Emissions Rules |
| Upgraded Intake Pipe | Medium | Medium | Issue Remains | Legal | Drivers Wanting a Performance Boost While Staying Emissions Compliant |
| EGR Delete + Upgraded Intake Pipe | High | High | Significantly Reduced | May Violate Emissions Regulations | Car Owners Looking for a Simple Performance Upgrade |
| EGR Delete + Upgraded Intake Manifold + Heat Shield Removal | Highest | Highest | Completely Eliminated | May Violate Emissions Regulations | High-Performance Seekers Willing to Invest |
4. Conclusion:
When dealing with carbon buildup, car owners have four options: deleting the EGR system, upgrading the intake pipe, or combining both. I personally recommend the 6.7 Cummins intake manifold upgrade + EGR delete for the best results. However, each option has its own pros and cons, and local emissions laws should be a key factor in your decision.
Would you choose EGR delete, intake pipe upgrade, or both? Your choice will depend on your performance goals, legal considerations, and long-term costs. Share your thoughts and experiences in the comments! 🚗💨
