M-Engineering M-Tuner Tune for Porsche 991.2 911 Carrera 2017-2019

M-Tuner is M-Engineering's at-home calibration suite for the 991.2 Carrera family, powered by the 3.0-liter twin-turbo flat-six. The wireless M-Tuner v3 dongle plugs into the OBD port and a Windows laptop does the flashing, so the ECU never leaves the car. Off-the-shelf maps cover 91, 93 and 100 octane, and On-The-Fly Live Map Switching lets you change between them while you drive.

M-Engineering's custom code adds Detonation Defense: when knock events go beyond a set threshold, the car is put into map slot 5 within 20 milliseconds for about 10 seconds. On manual transmission cars, an added engine safety detects excessive clutch slip. Auto Start/Stop is disabled on all off-the-shelf maps. The software also reads and clears engine faults, datalogs, shows live data and flashes back to stock whenever you want.

Stage 2 is generally about 20 to 40 whp more than Stage 1, according to M-Engineering, and Stage 3 cars with upgraded intercoolers run the Stage 2 calibrations. Upgraded turbos are not covered by the off-the-shelf maps and require a ProTune. New factory spark plugs gapped to .022 are recommended but not required.

One suite covers the Carrera and Carrera 4, Carrera T, Carrera S and 4S, and Carrera GTS and 4 GTS; choose your model in the selector.

Key specs

Features

• On-The-Fly Live Map Switching
• Detonation Defense: map slot 5 within 20 ms of excessive knock, for about 10 seconds
• Auto Start/Stop disabled on all off-the-shelf maps
• Read and clear engine faults, datalog and view live data
• Flash back to stock at your convenience
• Clutch slip engine safety on manual transmission cars

What is included

• M-Tuner v3 wireless OBD dongle
• M-Engineering maps for 91, 93 and 100 octane with On-The-Fly Live Map Switching
• Ability to go back to stock
• M-Engineering support

Required and recommended parts

• New factory spark plugs gapped to .022 (recommended, not required).
• Windows PC laptop and a battery charger for flashing.
• Upgraded turbos: a ProTune is required.
• PDK tuning via M-Tuner is a separate M-Engineering product.

Video

Frequently asked questions

Is this a bench flash or an OBD flash?
OBD. The M-Tuner Calibration Suite flashes the 991.2 Carrera at home through the OBD-II port with the wireless M-Tuner v3 dongle, so no ECU removal is necessary. You need a Windows PC, or a Mac running Boot Camp or similar, and a battery charger is highly recommended.

How much power will I gain?
M-Engineering publishes wheel dyno charts from its Mainline ProHub dyno in South Florida rather than a single figure. It states that Stage 2 generally makes about 20 to 40 whp more than Stage 1; the exact gain depends on your car, stage and octane.

Can I go back to stock for the dealer?
Yes. Flash back to stock whenever you like; the uninstall file restores your original CALID and CVN.

Fitment notes

Pick your model in the selector. US model years for the 991.2 Carrera family are listed below.