Ameer Randolph
Cummins is a brand that is synonymous with diesel engines, having invented the diesel engine as we know it back in the 1930s. One way to improve the performance of Cummins diesel engines is to perform a DPF (Diesel Particulate Filter) delete, which can improve fuel economy and engine performance. Another method is to perform an EGR (Exhaust Gas Recirculation) delete, which can also improve fuel economy and engine power, as well as minimize repairs and engine failure. These methods are often used by diesel owners to boost performance and eliminate reliability issues.
| Characteristics | Values |
|---|---|
| Purpose | To remove specific emissions control components from the 6.7L Cummins diesel engine |
| Removed Components | Diesel Particulate Filter (DPF), Exhaust Gas Recirculation (EGR) system, Diesel Exhaust Fluid (DEF) system |
| Benefits | Enhanced engine performance, improved fuel efficiency, increased power, improved engine cooling, reduced maintenance costs |
| Use Cases | Off-road, racing, heavy-duty use, long-distance driving, towing |
| Considerations | May not comply with local emissions regulations, potential impact on cold starts in colder climates |
| Related Parts | Grid heater, replacement pipes, tuning devices, valve cover, differential cover, intake horn |
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What You'll Learn
DPF delete services for Cummins diesel engines
DPF, or diesel particulate filter, is a standard component on diesel engine vehicles that captures soot and exhaust contaminants before they can be emitted into the environment. While the DPF might seem like a good thing, most vehicles experience a variety of issues with this component, mainly associated with its cleaning process, known as "regeneration".
Regeneration occurs at elevated temperatures when the soot and exhaust contaminants that are trapped in the filter are essentially burned out of it. However, regeneration often takes place every 300 miles or so, and only occurs when vehicles are traveling consistently at speeds of more than 45 miles per hour. When regeneration isn’t working properly, it can lead to problems with the DPF itself as well as issues with the diesel engine. For this reason, most diesel operators and fleet managers choose to have the DPF deleted.
By eliminating the DPF, you also eliminate the excessive fuel used for regeneration, leading to better fuel economy. Additionally, since the DPF restricts engine performance, removing it can result in better engine performance and a noticeable and immediate improvement in throttle response.
Diesel Spec is one company that offers DPF delete services for Cummins diesel engines. They have performed more than 50,000 tunings and delete services on medium and heavy-duty diesel-powered vehicles, including Cummins engines. They also offer EGR and UREA delete services on many Cummins engine models, which can help reduce unexpected maintenance and fuel expenses.
If you're considering a DPF delete, it's important to note that the process may vary depending on the specific Cummins diesel engine model and the replacement kit being used. Some general steps involved in the DPF delete process include disconnecting the EGT and oxygen sensors, removing the DPF pressure sensor tubes, and unbolting and removing the exhaust parts that are being deleted.
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EGR delete kits for Cummins diesel engines
The EGR (Exhaust Gas Recirculation) system is used in engines to reduce emissions by reintroducing exhaust gases. EGR delete kits are modification tools that can be used to optimise engine performance by removing the throttle valve and the restrictive EGR system.
SPETUNER offers EGR delete kits for 6.7 Cummins diesel trucks, which are engineered to offer a perfect fit and high-grade materials for maximum durability and power gains. These kits are designed specifically for 6.7L and 5.9L engines and are intended for off-road or racing use only. They are not street-legal in all areas, so it is important to verify local emissions laws before installing. The kits increase horsepower, improve fuel economy, and reduce long-term maintenance. They improve airflow, eliminate carbon buildup, and reduce stress on the diesel engine, boosting both performance and longevity.
DynoVox also offers EGR delete kits for 2007-2009 Dodge Ram 6.7L Cummins trucks, which are engineered to enhance engine performance by removing the restrictive EGR system.
Some people choose to keep their EGR system when deleting their Cummins engine, as it helps the engine warm up faster and keeps the cooling system running. However, others argue that the EGR system has a negative long-term effect on the engine, and that removing it will result in more power and better fuel economy.
In addition to EGR delete kits, DPF (Diesel Particulate Filter) delete services are also available for Cummins diesel engines. This service can improve fuel economy and engine performance, as the DPF requires fuel for regeneration, which restricts engine performance.
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Fuel economy improvements
One way to improve fuel economy is to delete the DPF (diesel particulate filter). The DPF requires fuel for regeneration, so removing it will also eliminate excessive fuel use, leading to better fuel economy and engine performance.
There are also a few basic modifications that can help improve fuel mileage. These include:
- A cold air intake
- A tuner
- An exhaust
Combining an intake with a tuner is the best way to maximize mileage increases. The sweet spot for the 6.7 Cummins engine is between 55mph and 70mph, with live testing showing up to 5mpg gains when highway driving at 65mph. It's important to note that city driving will result in smaller improvements, and speeds over 80mph are unlikely to see any benefits.
Other ways to improve fuel economy include:
- Slower constant speeds, ideally under 70mph
- Rolling into the throttle while accelerating, keeping boost linear with no spiking
- Maintaining correct tire pressure
- Keeping trailers loaded so that weight is distributed over the axles and ensuring the trailer is at the proper height
- Using hard tonneau covers, or keeping the tailgate up to reduce drag
- Choosing more efficient, versatile powertrains, such as the Cummins SmartAdvantage™ Powertrain, which can deliver up to a 6% increase in fuel economy
- Educating and rewarding drivers for efficient driving habits, placing safe performance ahead of speed, and encouraging proper maintenance
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Engine performance improvements
DPF deletion improves engine performance by removing the fuel requirement for regeneration, resulting in better fuel economy. This can lead to significant savings for fleet managers, who often cite fuel as one of their leading overhead costs. Additionally, the DPF restricts engine performance, so removing it results in a noticeable and immediate improvement in throttle response.
EGR deletion improves engine performance by reducing carbon buildup, intake temperatures, and increasing throttle response. The EGR system recirculates hot exhaust gases, which can cause carbon buildup and increased intake temperatures over time. Deleting the EGR system will also enable the engine to run cooler, more effectively, and more efficiently, minimising repairs and engine failure. This results in a healthier engine in the long term.
Combining multiple delete components can further enhance engine performance. For example, pairing a DPF delete with an EGR delete can result in even greater performance gains.
It's important to note that deleting the EGR system will trigger fault codes and a check engine light unless a compatible tuner is used. Services like Diesel Spec and SPELAB offer Cummins EGR Delete Kits and tuning services to optimise engine performance.
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Reliability improvements
Cummins diesel engines are widely regarded as reliable, powerful, and long-lasting. However, there are some measures that operators can take to improve the reliability of their Cummins diesel engines, particularly in relation to the Diesel Particulate Filter (DPF).
One key issue with Cummins diesel engines is the DPF regeneration process. Regeneration requires fuel, and if it is not working properly, it can lead to problems with the DPF and the engine. As a result, many operators choose to perform a DPF delete, which removes the DPF from the engine. This eliminates the excessive fuel usage associated with regeneration and improves engine performance.
Another factor affecting the reliability of Cummins diesel engines is the introduction of after-treatment emissions regulations in 2019. To comply with these regulations, Cummins transitioned from flat-tapped to hydraulic lifter systems, which some users believe lowered the reliability of the engines. To mitigate this issue, operators should prioritise regular oil changes and maintenance. Keeping clean oil in the emission engines is crucial to ensuring the reliability of the engine.
In addition to DPF deletes and regular maintenance, Cummins offers advanced glow plug technology in its 6.7L Turbo Diesel Pickup and Chassis Cab engine systems. This technology improves cold-start management, ensuring reliable vehicle operation even in extreme weather conditions.
Furthermore, Cummins has a strong reputation for producing long-lasting engine parts made from quality materials. Truckers often haul heavy loads over long distances, and Cummins engine parts are designed to handle these demands. Regular maintenance of Cummins engine parts is necessary to maintain their reliability and durability.
By combining proper maintenance, DPF deletes, and advanced engine technologies, operators can significantly improve the reliability of their Cummins diesel engines.
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Frequently asked questions
DPF, or diesel particulate filter, delete is a service offered for Cummins diesel engines. The DPF requires fuel for regeneration, so removing it will eliminate excessive fuel use and improve engine performance.
EGR, or exhaust gas recirculation, delete is a service offered for Cummins diesel engines. The EGR system recirculates hot exhaust gases, which reduces emissions but causes carbon buildup and reduces throttle response. Removing the EGR system will enable the engine to run cooler and more efficiently, improving fuel economy and engine power.
Deleting a Cummins diesel engine can improve reliability, fuel economy, engine performance, and long-term engine health.
A Cummins diesel EGR delete kit can be purchased online and installed with basic hand tools in 2-4 hours. A tuner is required to disable EGR-related diagnostics and clear fault codes.
