2015+ 5.7L to 6.4L (392 HEMI) Engine Swap Performance ECU Calibration

Swapping your 5.7L HEMI for a 6.4L (392) HEMI in a 2015 or newer Chrysler, Dodge, or Jeep platform is one of the most powerful upgrades you can make. But to complete the swap, your ECU must be recalibrated to correctly manage the 392 engine and the 8-speed transmission. MoPower Calibrations provides a Performance ECU Calibration Service that makes your swap plug-and-play with OEM-level drivability.

Why ECU Calibration Is Required

The 392 HEMI has different fueling, ignition, torque management, and airflow requirements than the 5.7L. Your swap will not run properly without reprogramming — leading to drivability issues, incorrect shifting, idle instability, or even engine damage. Our calibration corrects these parameters, ensuring your 392 swap runs like it came factory-installed.

Key Benefits of MoPower’s 5.7L → 6.4L Swap Calibration

• Seamless ECU Integration – ECU fully reprogrammed to identify and control the 6.4L HEMI.
• Restored OEM Functions – Idle, diagnostics, and factory security/immobilizer systems remain intact.
• Optimized Performance – Fuel, spark, and airflow maps recalibrated for the 392’s higher output.
• 8-Speed Transmission Support – Torque management and shift logic adjusted to match 6.4L power delivery.
• Proven Reliability – Dyno-validated and road-tested for safe, consistent results.

How It Works

1. Remove and ship your ECU/PCM from your 2015+ vehicle.
2. MoPower applies our 5.7L → 6.4L (392 HEMI) Calibration.
3. We return your ECU ready to install — plug-and-play.

Supported Platforms

This calibration supports 2015+ 5.7L vehicles upgraded to a 6.4L, including:

• Dodge Charger (5.7L → 392 HEMI swap)
• Dodge Challenger (5.7L → 392 HEMI swap)
• Chrysler 300 / 300C (5.7L → 392 HEMI swap)
• Jeep Grand Cherokee (5.7L → 392 HEMI swap)

Important Shipping Notes

⚠️ This is a mail-in ECU calibration service. Please send your ECU/PCM with:

• Your Full Name
• Your Return Address
• Your Vehicle VIN

Failure to include this information may delay service.

Disclaimer

• MoPower calibrations are for off-road / racing use only
• Not legal for use on public roads in many states and provinces
• Not for sale or use in California

Complete your 5.7L to 6.4L (392 HEMI) swap the right way with MoPower’s Performance ECU Calibration. Ship us your ECU today and enjoy seamless drivability and full 392 performance in your modern Mopar.