Porsche 991 GT3 ECU remapping
18 files available
About remapping
The Porsche 991 GT3 accounts for 18 files in our catalogue, entirely the 3.8 DFI naturally aspirated flat-six. It is the track-focused version of the 991-generation 911, built around a high-revving engine rather than boost.
The profile is unusual: 17 of the 18 files are Stage 2, with just 2 Stage 1. It reflects a car almost always modified in hardware before any map work. The ECUs are MED17.1.11, MED17.1 and MED17.1.1.
Model highlights
- ›17 Stage 2 files against 2 Stage 1: the most Stage 2-dominated entry in our catalogue.
- ›Entirely the 3.8 DFI naturally aspirated flat-six.
- ›The track-focused version of the 991-generation 911.
- ›ECUs limited to MED17.1.11, MED17.1 and MED17.1.1.
Fuel split
Engines
| 3.8 DFI | Petrol | 18 |
ECUs
ECU manufacturers
Available services
Remapping services
Stage 2
Remap for vehicles with mechanical upgrades (intake, exhaust, intercooler…).
Stage 1
Optimising the original map with no hardware changes: more power and torque, full reliability.
Why remap with Repromatronic
- ✓More power and torque with engine-safe tuning
- ✓Sharper throttle response and nicer driving
- ✓Potential fuel savings in normal driving
- ✓Files built from the original and 100% reversible
- ✓Made by technicians with thousands of projects behind them
Are you a driver?
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Log in as a professionalFrequently asked questions
Why is almost everything Stage 2 here?
These cars are used on track and almost always arrive with exhaust hardware already fitted. Stage 2 is what takes advantage of it.
How much does a naturally aspirated engine gain?
Considerably less than a turbocharged one — there is no boost to adjust. We are honest about this: expect refinement in delivery, not a large power figure.
Is the work reversible?
Yes. We always keep the original ECU file, so the car can be returned to its factory configuration.