Porsche 911 (996) 1997-2004 Carrera 4 Turbo 420bhp remap figures
Stock, this 1997-2004 Porsche 911 petrol (3.6L) produces 420bhp and 560Nm. Our expected figures for a Stage 1 remap are 485bhp and 646Nm, an expected gain of up to 65bhp and 86Nm.
Choose your map
Stage 1 remap figures
A Stage 1 remap is a software-only change to the ECU on an otherwise standard car. It needs no extra parts, which makes it the usual starting point.
| Stock | Vanguard expected | Expected gain, up to | |
|---|---|---|---|
| Power | 420 bhp | 485 bhp | +65 bhp |
| Torque | 560 Nm | 646 Nm | +86 Nm |
All maps at a glance
| Map | Power | Torque | Expected gain, up to |
|---|---|---|---|
| Stock | 420 bhp | 560 Nm | |
| Stage 1Maximum software-only performance | 485 bhp | 646 Nm | +65 bhp +86 Nm |
| Stage 1 EcoPerformance with economy in mind | 469 bhp | 639 Nm | +49 bhp +79 Nm |
| Eco mapEconomy first | 464 bhp | 635 Nm | +44 bhp +75 Nm |
Who is the Stage 1 map for?
- Drivers who want a noticeably quicker car from a software-only change, with no new parts.
- Daily drivers who want stronger mid-range pull and a sharper throttle.
- Anyone who wants the biggest gain we list without fitting hardware.
What this means for your 911
On a turbocharged petrol engine a remap adjusts boost, ignition timing and fuelling together, so both power and mid-range torque rise and the car pulls harder out of corners and junctions.
The ECU recorded for this variant is a Bosch ME7.8. Older engine management is simpler to work with, but age matters: worn sensors, leaks and tired components can hold back what a remap delivers, which is why we run a diagnostic check first.
We remap at our Belgrave Gate workshop in Leicester, or at your home or work within 30 miles, and every job starts with a diagnostic check.
Please note: these are expected figures, not guarantees. Real results vary with the condition of the vehicle, the ECU software version, fuel quality and the hardware fitted. Some options - including Stage 2 and anything that needs extra hardware - are for off-road or competition use only. We check every vehicle first and confirm what is achievable before any work starts.
Figures reviewed 22 October 2026.
Stage 1 questions
How much power does the Stage 1 map give the Porsche 911 Carrera 4 Turbo 420bhp?
We expect 485bhp and 646Nm against 420bhp and 560Nm as standard: up to +65bhp and +86Nm. These are expected figures, and we confirm what is achievable on your own car after a diagnostic check.
Does a Stage 1 remap need any extra parts on the Porsche 911 Carrera 4 Turbo 420bhp?
No. Stage 1 is a software-only change to the ECU on an otherwise standard car.
Is there a gentler map than Stage 1 for this engine?
Yes, two. Stage 1 Eco is performance with economy in mind: 469bhp and 639Nm expected. The Eco map is economy first: 464bhp and 635Nm. Both still sit above the standard 420bhp and 560Nm.
Do I need to tell my insurer about a remap?
Yes. A remap is a modification, so you should declare it to your insurer.
More Porsche 911 figures
Other petrol variants
- Turbo 420bhp 1997-2004
- Turbo S 450bhp 1997-2004
- Carrera GT3 381bhp 1997-2004
- Carrera GT3 360bhp 1997-2004
- Carrera GT2 483bhp 1997-2004
- Carrera 2 40th 345bhp 1997-2004
- Carrera 2 320bhp 1997-2004
- Carrera 300bhp 1997-2004
All petrol 911 (996) variants · 911 (996) 1997-2004 overview · All Porsche figures