Speed Limit VMAX Removal — Top Speed Limiter Disable

Speed limit VMAX removal is a professional ECU calibration service that disables the factory top-speed limiter implemented in many production vehicles.
Manufacturers use these limiters to comply with regional laws, tire ratings or drivetrain safety. Our software-based calibration removes the restriction inside the ECU flash or microcontroller, allowing the engine to reach its real performance potential—always within mechanical and legal limits.
On selected MEDC17 platforms we also provide a switchable VMAX feature, letting the driver toggle the limiter on or off through an OEM-style switch or menu.

How VMAX removal works

The ECU supervises vehicle speed by comparing wheel-speed sensors, engine rpm and gear ratios. When the computed velocity exceeds the preset VMAX threshold, the control unit limits torque—closing the throttle, cutting fuel or retarding ignition.
Our calibration modifies those tables and torque interventions directly in the flash/micro area, preventing the unwanted cut.
All speed limit VMAX removal files are bench-validated and dyno-tested to confirm that over-rev, over-boost, temperature and oil-pressure protections remain fully active.

What this service includes

• Complete ECU-level removal of the VMAX limiter from flash/micro memory.
• Optional switchable VMAX logic on supported MEDC17 ECUs.
• Preservation of diagnostic and safety functions (DTC read/clear, limp protection, component safety).
• Validation of speed signal integrity and torque model coherence after modification.

Platform notes

Some vehicles enforce secondary limits outside the ECU:

• Cluster / EEPROM: certain dashboards impose their own speed cap and must be edited separately.
• TCU / Gearbox: some transmissions restrict top-speed or rpm in higher gears; a TCU tune may be required.
• ESP / BCM: rare cases where auxiliary modules request torque reduction—verify logs after tuning.

WE REMOVE LIMITERS FROM FLASH/MICRO ONLY.
IF A LIMITER EXISTS IN DASH/EEPROM OR TCU, A SEPARATE ACTION IS REQUIRED.

When to choose this service

• For motorsport or track-day vehicles where the OEM speed cap is restrictive.
• When altering gear ratios or tire sizes that trigger the limiter prematurely.
• During Stage 1-2-3 tuning where additional torque allows higher safe velocities.
• For performance testing or VMAX runs on closed circuits.

Benefits & safety recommendations

– Removes the electronic speed restriction inside the ECU.
– Maintains all primary engine protection systems active.
– Provides smooth, linear acceleration to true vehicle capability.
– Optional switchable profile for street/track flexibility.

Before using: confirm tire speed rating, brake balance, cooling efficiency and gearbox limits.
Speed limit VMAX removal is intended for off-road and motorsport use or where permitted by local regulation.

Additional technical details

The VMAX parameter is usually stored as a torque-limit vs. speed map or as a single scalar constant referenced by driver-wish and gearbox modules.
On most Bosch MED/EDC ECUs, it is implemented as a speed threshold for torque request validity.
Our engineers identify and recalibrate these tables precisely, verifying that ABS/ESP systems remain unaffected.
On some vehicles, we can provide dual-profile solutions via CAN or switch inputs, enabling quick toggling between stock and unrestricted modes.