Stage 1 Fiat 500 1.4 T-Jet Stage 1 ECU Tuning File – V713MH81 (MM8GMK) HW670

Change log

  • v1.0 — 2025-05-27
    • Initial Stage 1 remap for Marelli MM8GMK (V713MH81)
    • Torque and boost curves refined for midrange gain
    • Checksum correction (OLS294 v2.70) applied
    • Dyno-tested on Fiat 500 1.4 MultiAir
    • Delivered as full binary, original included​

Release notes

  • v1.0 — 2025-05-27
    This release introduces a reliable Stage 1 remap for the Fiat 500 1.4 T-Jet MultiAir with Marelli MM8GMK ECU. Developed for enhanced drivability and better torque spread, this calibration maintains OEM safety limits and includes a checksum-verified binary. Supplied with original for reference.​

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