ENGINE · 2011-present
Hemi 6.4 SRT tuning
Chrysler 6.4L 392 Hemi V8 (SRT / Scat Pack). V8 NA pushrod (3rd gen Hemi 392), 6.4 L, 485-492 HP stock. Cars: Dodge Challenger Scat Pack / SRT 392, Charger Scat Pack / SRT 392, Jeep Grand Cherokee SRT, Durango SRT.
Engine specs
| Engine code | Hemi 6.4 SRT |
|---|---|
| Configuration | V8 NA pushrod (3rd gen Hemi 392) |
| Displacement | 6.4 L |
| Production years | 2011-present |
| Stock power | 485-492 HP |
| ECU family | Chrysler PCM5 → |
Tuning stages on Hemi 6.4 SRT
| Stage 1 | +20-35 HP |
|---|---|
| Stage 2 | +40-60 HP (headers + cat delete + intake) |
| Stage 3 | +200+ HP (supercharger — Whipple, Procharger) |
Conservative real-world estimates. Actual results depend on hardware health, fuel quality, ambient temperature, and the specific calibration written.
Services available on Hemi 6.4 SRT
Common DTC codes on Hemi 6.4 SRT
Brands running Hemi 6.4 SRT
Workshop workflow
- Read the Hemi 6.4 SRT 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 Chrysler PCM5 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 TPROT + multi-block CRC32 is recomputed automatically.
- Flash via your existing flasher. Adaptation reset via OEM scan tool if required.