Considering an ECU remap for your Porsche 911 GT3 3.8i 475hp? A Stage 1 remap can take this 2011 - 2015 ( 991 ) petrol engine from 475 BHP to 500 BHP and from 440 Nm to 470 Nm of torque (naturally aspirated). This engine scores 3.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Porsche 911 can achieve.
The Porsche 911 GT3 3.8i 475hp is a 3.8L naturally aspirated petrol engine producing 475 BHP and 440 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 500 BHP and 470 Nm — a gain of around 25 BHP (5%) and 30 Nm (7%).
This engine has limited remap suitability, though the available headroom is limited, so gains are modest compared to higher-output variants. The tuning headroom is classified as limited, based on the percentage gain available from the factory output.
Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. High tuned torque: check transmission torque capacity and service history.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.
| Engine | BHP | Gain | Torque | Gain | Score |
|---|---|---|---|---|---|
| Carrera 3.4i 350hp | 350 → 370 | +20 | 390 → 410 | +20 | Limited (3.5/10) |
| Carrera S 3.8i 400hp | 400 → 440 | +40 | 440 → 460 | +20 | Limited (3.5/10) |
| 3.8i GTS 430hp | 430 → 450 | +20 | 440 → 460 | +20 | Limited (3/10) |
| 4.0 GT3 RS 500hp | 500 → 525 | +25 | 460 → 485 | +25 | Limited (3.5/10) |
| 3.8i Turbo 520hp | 520 → 600 | +80 | 710 → 800 | +90 | Good (6/10) |
| 3.8i Turbo S 560hp | 560 → 600 | +40 | 750 → 800 | +50 | Moderate (5.5/10) |
Get a personalised remap quote for your Porsche 911. We'll connect you with a trusted professional in your area.
All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.
We recommend discussing your specific vehicle with a qualified remap professional before proceeding.
