MX-5 NC 2.5L Swap – Stage 2 Cams | 218 HP by DMS TUNED

This Mazda MX-5 NC completed a full 2.5L Duratec conversion and calibration at DMS TUNED. The entire build was finalized within one week — from engine preparation to dyno tuning.

MX5 NC 2.5 swap engine bay DMS Tuned

Build Specification

  • Good used 2.5L Duratec engine
  • New fuel pump
  • New water pump
  • New MAF sensor
  • DMS Stage 2 camshafts
  • Pipercross panel filter
  • Full inspection and hidden issue correction
  • Wiring refreshed and secured
  • Complete mechanical tightening and verification
  • DMS Stage 1 custom ECU calibration

Dyno Result

218 HP
270 Nm

MX5 NC 2.5 dyno graph DMS Tuned

Technical Outcome

The 2.5L platform delivers strong mid-range torque. The DMS Stage 2 camshafts add upper-RPM character. The intake upgrade improves airflow efficiency. The calibration ties the entire setup together with stable AFR and optimized ignition timing.

Cold start was immediate and stable. Idle smooth. Power delivery linear and predictable.

DMS 2.5 Duratec swap installation

This configuration represents a balanced naturally aspirated 2.5 swap focused on drivability, reliability and real torque gains.

Interested in upgrading your MX-5 NC to a 2.5L platform? Contact DMS TUNED to discuss your build.