Unleashing the Beast: Tuning Your 6.7 Cummins with Deletes
The 6.7 Cummins engine is a powerhouse, known for its reliability and torque. But many owners seek to unlock even more potential, often turning to tuning and deleting emission systems. This guide explores the world of 6.7 Cummins tuning with deletes, outlining the benefits, drawbacks, and crucial considerations before taking the plunge. We'll also address common questions surrounding this popular modification.
What are deletes on a 6.7 Cummins?
"Deletes" refers to the removal or disabling of emission control components. These typically include the diesel particulate filter (DPF), selective catalytic reduction (SCR), and exhaust gas recirculation (EGR) systems. These systems, while crucial for meeting environmental regulations, can restrict airflow and power output. Removing them allows for a more free-flowing exhaust system, potentially leading to performance gains.
What are the benefits of tuning a 6.7 Cummins with deletes?
Tuning a 6.7 Cummins after deleting emission components offers several key advantages:
- Increased Horsepower and Torque: By removing the restrictive emission systems and adjusting fuel delivery via a custom tune, you can significantly increase horsepower and torque. This translates to better towing capacity and improved acceleration.
- Improved Fuel Economy: While counterintuitive, some owners report improved fuel economy after tuning and deleting, particularly at lower RPMs where the engine is less burdened by the emission systems.
- Reduced Exhaust Backpressure: Removing the DPF and other components reduces backpressure, allowing for more efficient exhaust flow and potentially extending engine life.
- Elimination of DPF and DEF issues: DPFs are prone to clogging, requiring costly regeneration cycles or replacement. Deleting the DPF eliminates this concern entirely. Similarly, the SCR system's reliance on diesel exhaust fluid (DEF) is eliminated, saving on DEF costs and reducing the potential for DEF-related problems.
What are the drawbacks of tuning a 6.7 Cummins with deletes?
Despite the potential benefits, tuning and deleting your 6.7 Cummins also has drawbacks:
- Increased Emissions: Deleting emission components will undoubtedly result in higher emissions, potentially leading to legal issues in areas with stringent emission regulations.
- Voiding Warranty: Modifying your engine's emission system will almost certainly void your factory warranty.
- Potential for Increased Engine Wear: Aggressive tuning can put additional stress on engine components, potentially leading to premature wear. A poorly-tuned engine may also suffer from increased heat and reduced reliability.
- Legal Implications: Driving a vehicle with modified emission systems may be illegal in your region, resulting in fines or other penalties. This is a critical aspect to consider before proceeding.
- Increased Particulate Matter: Removing the DPF will significantly increase the amount of particulate matter released into the atmosphere.
Is it illegal to delete a 6.7 Cummins?
The legality of deleting your 6.7 Cummins varies greatly depending on your location. In many areas, tampering with emission control systems is illegal, and you could face fines or other penalties. Check your local and state laws and regulations before making any modifications.
What kind of tuner should I use for my 6.7 Cummins with deletes?
The choice of tuner depends heavily on your experience level, budget, and desired performance gains. There's a wide variety of tuners available, from simple plug-and-play units to more sophisticated custom tunes. Research different options and choose a reputable tuner with experience in tuning 6.7 Cummins engines.
How much does it cost to delete and tune a 6.7 Cummins?
The cost of deleting and tuning a 6.7 Cummins varies depending on the components removed, the type of tuner used, and the labor involved. Expect to invest several thousand dollars for a complete delete and professional tuning.
Will deleting my DPF improve fuel mileage?
While some users report improved fuel economy after deleting the DPF, it's not guaranteed. The actual impact on fuel mileage depends on various factors, including driving style, the tune itself, and the overall condition of the engine.
Can I tune my 6.7 Cummins without deleting?
Yes, you can tune your 6.7 Cummins without deleting the emission components. However, the potential performance gains will be significantly less than with deletes. This approach also allows you to maintain your factory warranty.
This guide offers a comprehensive overview of tuning a 6.7 Cummins with deletes. Always prioritize safety, legality, and informed decision-making before undertaking such modifications. Consulting with experienced mechanics or tuners is highly recommended to ensure a successful and safe outcome. Remember, the information provided here is for educational purposes only and should not be considered professional advice. Always consult with qualified professionals before making any modifications to your vehicle.
