ENGINE · 1991-2002
RB25DET tuning
RB25DET — Nissan 2.5 single-turbo inline-6 (Skyline R33 / R34 GTS-T). I6 turbo DOHC 24v, 2.5 L, 247-280 HP (Neo Series 280) stock. Cars: Nissan Skyline GTS-T R32, GTS-25T R33, R34 GT-T, Stagea Series 1/2 RB25DET.
Engine specs
| Engine code | RB25DET |
|---|---|
| Configuration | I6 turbo DOHC 24v |
| Displacement | 2.5 L |
| Production years | 1991-2002 |
| Stock power | 247-280 HP (Neo Series 280) |
| ECU family | Nissan 32-bit ECU + Nistune / PowerFC → |
Tuning stages on RB25DET
| Stage 1 | +30-50 HP |
|---|---|
| Stage 2 | +80-130 HP (Garrett T28R upgrade, fuel system, intercooler) |
| Stage 3 | +300-500+ HP (Garrett GT3076R / GT3582R, head studs, RB26 head conversion) |
Conservative real-world estimates. Actual results depend on hardware health, fuel quality, ambient temperature, and the specific calibration written.
Services available on RB25DET
Common DTC codes on RB25DET
Brands running RB25DET
Workshop workflow
- Read the RB25DET ECU via OBD or bench using your existing flasher (KESS3, AutoTuner, MPPS, Trasdata, FRF).
- Open Softechpro V5 and drag the .bin / .ori / .hex / .s19 / .frf onto the workspace. The Nissan 32-bit ECU + Nistune variant is auto-detected.
- Pick the service tab and apply Stage 1 / 2 / 3 / DPF OFF / EGR OFF / AdBlue OFF as required.
- Save patched .bin — the outer CRC is recomputed automatically.
- Flash via your existing flasher. Adaptation reset via OEM scan tool if required.