Porsche 911 GT3 3.8i 475hp Remap

Name: Porsche 911 GT3 3.8i 475hp ECU Remap
Brand: Porsche

Expected gains of +25 BHP and +30 Nm torque

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BHP+25 hp (5%)

Standard

475 hp

Tuned

500 hp

Torque+30 Nm (7%)

Standard

440 Nm

Tuned

470 Nm

Suitability

Limited (3.5/10)

Gains Profile

Limited headroom

Headroom

Low

Porsche 911 GT3 3.8i 475hp ECU Remapping

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.

How this engine compares

25thof 49 Porsche 911 engines by power gain
28%of the 9,842 engines we hold gain data for see a smaller power increase
17%of engines with torque data see a smaller torque increase

Comparisons are calculated from our own recorded Stage 1 figures.

Assessment

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.

Considerations

!Naturally aspirated engine: gains are usually limited; results vary widely.

!High tuned torque: check transmission torque capacity and service history.

Other 911 2011 - 2015 ( 991 ) Engines

Engine

Technical Specifications

Fuel Type: Petrol
Aspiration: Naturally Aspirated
Displacement: 3.8L
Capacity: 3799 CC
Type: Car
Engine Family: Porsche 3.8L NA Petrol

ECU & Transmission

Likely ECU Low confidence: Petrol ECU (varies by market/year)
Gearbox Low confidence: Transmission varies by trim and market; check manual/automatic type and torque rating. At this torque level, transmission and driveline servicing history becomes especially important.

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Confirm Your Vehicle

MakePorsche

Model911

Generation2011 - 2015 ( 991 )

EngineGT3 3.8i 475hp

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.

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)