Comparative Dyno Testing: 2019 F250 Stock vs. Deleted with Varied Tune Aggressiveness

The 6.7L Powerstroke is a capable engine, but its factory emissions systems significantly limit performance potential. To quantify these restrictions, we conducted back-to-back dyno testing on a 2019 F250 in three configurations:

1.    100% Stock (factory emissions intact)

2.    Fully Deleted (EGR/DPF removed, mild tune)

3.    Deleted + Aggressive Tuning (maximized airflow & fuel mapping)

This study reveals how EGR/DPF removal and tuning strategies affect power, torque, and drivability—with concrete dyno results.

Testing Methodology

·         Same truck, same dyno (Mustang MD-1100)

·         All runs in 4th gear (1:1 ratio)

·         Corrected for SAE J1349 standards

·         Fuel: #2 ULSD (same batch for all tests)

Test Configurations:

1.    Stock Baseline

o    Factory airbox, exhaust, and tuning

o    Emissions systems fully operational

2.    Deleted + Mild Tune (50HP)

o    EGR delete kit installed

o    DPF delete pipe with straight-through muffler

o    Conservative street tune

3.    Deleted + Hot Tune (150HP)

o    High-flow cold air intake

o    Performance exhaust manifold

o    Aggressive fueling & turbo mapping

Dyno Results: Power & Torque Gains

Key Observations:

✔ Even a mild delete + tune unlocks 50+ HP (just from removing EGR/DPF restrictions)
✔ Aggressive tuning nearly doubles torque gains (optimized turbo spool & fuel delivery)
✔ Power delivery is smoother (no DPF-induced backpressure spikes)

Why Deletes Make Such a Difference

1. EGR Removal Improves Combustion Efficiency

·         No recirculated soot means cleaner intake air

·         Lower cylinder temps reduce thermal stress

2. DPF Deletion Eliminates Exhaust Restrictions

·         Turbo spools 15-20% faster without DPF backpressure

·         EGTs drop by 200-300°F under load

3. Tuning Maximizes the Benefits

·         Optimized VGT control reduces lag

·         Precise fuel mapping prevents smoke while increasing power

Real-World Driving Impressions

·         Throttle response is drastically improved

·         Turbo lag nearly eliminated in hot tune

·         Exhaust note deepens (without being obnoxious)

·         MPG gains of 1.5-2.5 observed in mild tune

The Best Delete Setup for Your Needs

For Daily Drivers:

✔ Mild EGR/DPF delete
✔ Conservative 50-75HP tune
✔ Retains reliability while improving efficiency

For Performance Enthusiasts:

✔ Full delete + high-flow intake/exhaust
✔ 150HP+ tune for max power
✔ Requires supporting mods (turbo, trans upgrades)

Upgrade Your 6.7L Powerstroke Today

Ready to unlock your Ford diesel’s potential? Our proven EGR/DPF delete kit fits 2011-2023 Power Strokes and includes everything needed for a clean install:
👉 2011-2023 Ford 6.7L Powerstroke EGR/DPF Delete Kit