TUNING THE NISSAN CA18DET (S13)
This Nissan CA18DET S13 with a GT28RS turbo was previously running an HD Stage 3 chip. This was simply not the right setup for the engine. As with any build, the engine must be custom tuned correctly — and that means either a proper ROM tune or a dedicated engine management system.
In this case, an FCTuningNistune ECU was the right choice. It gave us full control over fuelling, ignition timing, and boost management to build a tune specifically for this CA18DET and GT28RS combination.
After about an hour on the dyno, the car was performing much better in every area. Torque, acceleration, and overall power all improved. Most noticeably, the power delivery became much smoother through every gear. The Stage 3 chip could never have delivered results like this. A proper custom tune makes all the difference.