We are proud to announce our new M-Tuner suite which covers all 991.2 models of Porsche. World-renowned for the 992 platform, we are now here to bring the industry leading software and engineering to 991.2, available now with On-The-Fly Live Map Switching and added engine safeties! 



M-Engineering has been at the forefront of Porsche ECU tuning, and has spent countless hours of research and development to provide reliable performance improvements.

Our M-Tuner Calibration Suite will allow at-home OBD flashing, no ECU removal is necessary. Our software also features the ability to read and clear engine faults, datalog, view live data, and flash back to stock at your convenience.

ALSO AVAILABLE: 991.2 PDK Tuning! 

Adjustments are made to improve the throttle response, adjust air/fuel ratios, increase boost, and modify ignition timing and much more to improve the overall driving performance of the 3.8L twin-turbocharged engine. M-Engineering still utilizes all OEM ECU engine safety strategies.

Compatible with all 991.2 GT2 RS models. This includes the street car, Clubsport, EVO/MR, and 935. 

What's Included?

• M-Tuner Dongle for OBD Flashing
• USB Cable
• M-Engineering maps with Live Map Switching built for your 991.2 Turbo (91, 93, and 100 octane) (100 octane only for Clubsport/935/MR cars)(see calibration notes)
• Ability to go back to stock
• M-Engineering Support

Standard OTS Map Slots

The 991.2 OTS Maps from M-Tuner come standard as shown below for Stage 1 and Stage 2 setups. If you want to rearrange these slots or add a 4th slot, ProTuning can be purchased and arranged with us.

Slot 1 - 91 Octane or 95 RON

Slot 2 - 93 Octane or 98 RON

Slot 3 - 100 Octane or 103 RON

Slot 4 - Unused (can be unlocked with ProTuning)

Slot 5 - Engine Safety (Detonation Defense) 

Engine Safety Map Slot (Slot 5)

M-Engineering has written custom code for additional engine safeties beyond was is provided from the factory. Our engine tuning strategy has always been for engine safety first, and power second. This has allowed us to maintain vehicle reliability and have the most powerful calibrations on the market proven time and time again in competitive racing series, at the drag strip, and setting world records at Pikes Peak.

Our custom code has allowed us to implement what is called “Detonation Defense” which is an engine safety that detects excessive knock events. When knock events beyond a set threshold are met, within 20 milliseconds, the car will automatically be put into map slot 5 for a brief period of 10 seconds. In map slot 5, the car will have reduced power and engine load to prevent damage. This proactive approach protects your engine and allows power to return once conditions are again safe.

Stage 3 cars (upgraded intercoolers) will use Stage 2 calibrations. 

ProTuning is available for Stage 4 (upgraded turbos), built motors, and ethanol blends. 

UPGRADED TURBOS REQUIRE PROTUNING. 

Auto Start/Stop function is disabled on all OTS maps. PSE Valve Mod for GT2RS (forces valves open 100% on PSE Exhaust) is also enabled. 

These are the current vehicles supported by this version of M-Tuner. Please review our calibration notes for more information regarding hardparts requirements, octane requirements, and additional dyno plots. 

991.2 GT2RS
991.2 GT2RS Clubsport (100 octane only)
991.2 GT2RS EVO/MR (100 octane only)
935 (100 octane only)

Our installation instructions are located here. 

GT2 RS:

Stage1

• 91 Octane (R+M)/2 or 95 RON

  

   

• 93 Octane (R+M)/2 or 98 RON

  

   

• 100 Octane (R+M)/2 or 103 RON

  

Disclaimer: You accept responsibility and risks of any tunes and added features by M-Engineering. If you are not the end user of the car, you will be solely responsible for notifying the purchaser and/or customer they also accept the responsibility and risks of these and M-Engineering is not liable. M-Engineering is also not liable for voided warranties due to installation of our products. 

Return Policy: All sales are final and non-refundable. M-Engineering provides specific software calibrations for individual vehicle use and is not liable for misuse or vehicle behavior due to installation error or mechanical issues. M-Engineering will work one-on-one with individuals to assist with remote diagnosis to vehicles to our best ability and advise next-action steps as needed. End-users are responsible for vehicle maintenance, integrity of aftermarket parts installation, and having their vehicles up-to-date with their manufacturer's latest updates and TSB's.