Mazda MX-5 NC 2.5 Duratec Swap – 185HP Custom Tune
This Mazda MX-5 NC 2.5L Duratec swap came in for a custom ECU calibration focused on extracting clean, usable power while keeping the setup simple and reliable.
Vehicle Configuration
- Engine: 2.5L Duratec (MZR swap)
- Exhaust: Stock system
- Headers: 4-1 performance manifold (45mm)
- Intake: Stock airbox
- ECU: Factory ECU custom tuned by DMS Tuned
Dyno Results
- Final Output: 185HP
- Torque: 255Nm
- Improved mid-range response and smoother throttle delivery
The calibration focused on ignition timing optimization, fuel mapping refinement and airflow modeling to maximize efficiency from the 45mm 4-1 headers while maintaining safe air-fuel ratios and OEM-like drivability.
This setup proves that even with stock exhaust and stock airbox configuration, a properly tuned 2.5L swap can deliver strong torque and responsive performance.
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