Exhaust Gas Recirculation (EGR) is a technology that has become prevalent in modern diesel engines. It is a system that recirculates some of the engine’s exhaust gases back into the combustion chamber, which can reduce the formation of harmful nitrogen oxides (NOx) during combustion. However, like DPFs, EGRs have their issues, including the potential for blockages and increased fuel consumption. As a result, some people have turned to EGR deletes, remapping, and tuning as a solution. In this article, we will explore each of these topics in detail and discuss their pros and cons.
What is Exhaust Gas Recirculation (EGR)?
Exhaust Gas Recirculation (EGR) is a system that recirculates some of the engine’s exhaust gases back into the combustion chamber. The recirculated exhaust gases displace some of the air in the combustion chamber, which reduces the amount of oxygen available for combustion. This, in turn, reduces the temperature of the combustion process, which can reduce the formation of NOx.
While EGRs have their benefits, they also come with some issues. One of the most common issues with EGRs is the potential for blockages. Over time, the recirculated exhaust gases can leave deposits in the EGR system, which can impede its ability to function properly. Additionally, EGRs can increase fuel consumption, as the recirculated exhaust gases displace some of the air that would otherwise be used for combustion.
Like DPF deletes, some people have turned to EGR deletes as a solution to the issues associated with EGRs. An EGR delete involves removing the EGR system from the engine altogether. This is often done by replacing the entire intake manifold with a custom intake manifold that does not include an EGR system. Alternatively, some people choose to have the EGR physically removed from the engine while leaving the original intake manifold intact.
Pros and Cons of EGR Deletes
The main advantage of an EGR delete is that it eliminates the potential for blockages in the EGR system. This can be particularly beneficial for people who use their diesel engines in off-road or agricultural applications where the engine may be exposed to harsh conditions. Additionally, an EGR delete can increase the performance of the engine by improving airflow and reducing the amount of recirculated exhaust gases, which can reduce fuel consumption.
Another solution to the issues associated with EGRs is EGR remapping. EGR remapping involves modifying the engine’s control module to alter the way the EGR operates. Specifically, EGR remapping can adjust the amount of exhaust gas recirculated back into the engine or change the timing of the recirculation process.
Pros and Cons of EGR Remapping
The primary advantage of EGR remapping is that it can reduce the potential for blockages in the EGR system while still maintaining the benefits of the technology. Additionally, EGR remapping can improve engine performance by optimizing the way the EGR operates.