The 6.7 Cummins engine, a powerhouse known for its torque and reliability, can be further optimized with tuning and deleting emissions equipment. This guide explores the potential benefits, risks, and considerations involved in this popular modification. We'll delve into the specifics, addressing common questions and concerns surrounding this powerful combination.
What are Deletes on a 6.7 Cummins?
"Deletes" refers to the removal of emissions control components like the Diesel Particulate Filter (DPF), Exhaust Gas Recirculation (EGR) system, and Selective Catalytic Reduction (SCR) system. These systems, while crucial for meeting emission standards, can restrict airflow and reduce engine performance. Removing them allows for increased airflow and potentially higher horsepower and torque outputs.
How Does Tuning Enhance a 6.7 Cummins with Deletes?
Tuning, typically through a custom-programmed engine control module (ECM), adjusts various engine parameters to optimize performance after deleting emissions components. This customized programming can adjust fuel delivery, timing, and other factors to take full advantage of the increased airflow resulting from the deletes. The result can be significant gains in horsepower, torque, and overall responsiveness.
What are the Benefits of Tuning a 6.7 Cummins with Deletes?
The primary benefits center around increased performance and efficiency:
- Increased Horsepower and Torque: Expect significant gains, often in the hundreds of horsepower and foot-pounds of torque, depending on the tuner and specific modifications.
- Improved Fuel Economy (Potentially): While not always guaranteed, some owners report improved fuel economy after tuning and deleting, particularly under certain driving conditions. The increased efficiency stems from better combustion resulting from the enhanced airflow.
- Enhanced Throttle Response: The engine becomes more responsive and quicker to accelerate.
- Reduced Exhaust Backpressure: Deleting the DPF and other restrictive components significantly lowers backpressure, improving overall engine breathing.
What are the Risks and Drawbacks of Tuning a 6.7 Cummins with Deletes?
While the performance benefits are attractive, it's crucial to acknowledge the potential downsides:
- Increased Emissions: This is the most significant drawback. Deleting emissions systems results in increased emissions of particulate matter and other pollutants, which can be harmful to the environment and may violate local regulations.
- Voiding the Warranty: Modifying your engine's emissions system will almost certainly void any remaining factory warranty.
- Potential for Engine Damage: Improper tuning or aggressive tuning settings can lead to engine damage, potentially causing expensive repairs.
- Legal Ramifications: Depending on your location, operating a vehicle with deleted emissions systems may be illegal and result in fines or other penalties.
- Increased Maintenance: While some report improved fuel economy, others may experience increased wear and tear on engine components due to the increased stress from higher power outputs.
What Type of Tuner is Best for a 6.7 Cummins with Deletes?
The choice of tuner depends on your budget and desired performance level. Several reputable tuners offer various levels of adjustment, from mild to extreme. Research thoroughly and choose a tuner with a proven track record and positive user reviews. Consider factors like customer support and the tuner's ability to provide custom tuning options.
Can I Tune My 6.7 Cummins Without Deletes?
Yes, tuning can be done without deleting emissions components. However, the performance gains will typically be more modest compared to tuning with deletes. This approach maintains compliance with emissions regulations and preserves the factory warranty.
What are the Legal Implications of Tuning and Deleting a 6.7 Cummins?
The legality of tuning and deleting varies widely depending on your location. Some regions have stricter emission regulations than others. It's crucial to research and understand the laws in your area before making any modifications. Operating a vehicle with illegal modifications can lead to substantial fines and legal consequences.
How Much Does it Cost to Tune a 6.7 Cummins with Deletes?
The cost varies greatly depending on the tuner, the level of tuning, and the cost of deleting the emissions equipment. Expect to pay several hundred to over a thousand dollars for tuning alone, with additional costs for parts and labor associated with deleting emissions components.
This guide provides a comprehensive overview. Always conduct thorough research and consult with experienced mechanics or tuners before making any modifications to your 6.7 Cummins engine. Remember that responsible modification is key to ensuring both performance and longevity.
