Porsche Cayenne 958 3.0 TFSI ECU Tuning File – SIMOS8.5 S8500L3000000 (Performance Upgrade) 0003 Stage 2 

Change log

  • v1.0 — 2025-05-25
    • Stage 2 calibration for SIMOS8.5 (Cayenne 3.0 TFSI)
    • Boost control, ignition and fuel maps adjusted
    • Gear torque limiters disabled
    • CMD Flash compatible, checksum verified (OLS818 v3.29)​

Release notes

  • v1.0 — 2025-05-25
    • Full Stage 2 for Porsche 3.0 TFSI SIMOS8.5
    • Recalibrated throttle, torque and boost logic
    • Siemens Tricore checksum plugin OLS818 v3.29
    • Ready-to-flash via CMD Flash​