Legend Tuned · Chip Tuning
BMW Z4 (E85/E86) Z4 M (S54) 343 HP Chip Tuning
- 2002–2008
- Petrol
- 343 HP · 365 Nm
- ECU: Siemens/Continental MSV70
Target with Legend Tuned Stage 1: 365 HP / 385 Nm; with Stage 2: 380 HP / 400 Nm. The original software is backed up, the calibration is tailored to the car, and the result is verified by datalog.
Legend Tuned figures
Figures are examples/estimates and may vary with the car's mileage, maintenance condition, fuel quality and hardware. Exact results are determined by dyno/datalog.
Power & torque curve
Stock vs Stage comparison
A representative power and torque curve with a technical table of all figures. Hover over the chart to see values by rpm.
- Power · Stage 1
- Torque · Stage 1
- Power · Stock
- Torque · Stock
Technical figures
| Value | Stock | Stage 1 | Stage 2 |
|---|---|---|---|
| Power | 343 HP | 365 HP | 380 HP |
| Power (kW) | 252 kW | 268 kW | 279 kW |
| Torque | 365 Nm | 385 Nm | 400 Nm |
| Power gain | — | +22 HP (+6%) | +37 HP (+11%) |
| Torque gain | — | +20 Nm (+5%) | +35 Nm (+10%) |
Figures are examples/estimates and may vary with the car's mileage, maintenance condition, fuel quality and hardware. Exact results are determined by dyno/datalog.
Custom software · 5 options
Custom software options for this engine
Legend Tuned functions suitable for this engine, which can be applied in the same session as Stage software or on their own.
Emission Systems
Emission system solutions for track and motorsport projects.
- Catalytic Converter Delete (Cat Off) ECU software that prevents the check-engine light and power loss on cars with a removed or replaced catalytic converter.
- Rear Lambda/O2 Sensor Delete Software that turns off monitoring of the post-cat (rear) oxygen sensor to prevent the check-engine light on downpipe and sports cat setups.
Legal notice: Software for emission systems (catalytic converter, DPF/FAP, OPF, EGR, AdBlue/SCR, etc.) is intended solely for track / motorsport and closed-course use. Driving vehicles with these systems disabled on public roads, and presenting them for TÜVTÜRK inspection, may be against regulations. On request, the original software can be restored.
Driving & Sound Effects
Make yourself heard and be first off the line.
Fault & Function Solutions
Permanent software fixes for annoying faults.
Stage 2 hardware, peace of mind and process
Stage 2 requirements
Stage 2 ready with the Custom Sport Filter Kit
At Stage 2, the engine's breathing is freed up with hardware, and the software is written to match that hardware. The target for this engine is 380 HP / 400 Nm.
- Air intakeThe made-to-measure Legend Custom Sport Filter Kit or an intake suited to the car.
- Intercooler & boostA vehicle-specific intercooler / blow-off valve to keep temperatures stable under sustained load.
- Silicone boost hosesHoses and pipes that withstand the higher pressure.
- Health checkIgnition, fuel system and clutch checked for this power level; the job takes ~4–8 hours (depending on parts fitted).
Included every time
Power with peace of mind
- Original software backup — the factory software is read and archived before the job.
- Reversal — the car can be returned to its original software whenever you ask.
- Datalog check — boost pressure, ignition and air/fuel ratio are recorded and checked on a road test.
- Vehicle-specific calibration — not an off-the-shelf file; tuned to the engine, hardware and fuel quality.
- Pre-tune diagnostics — fault memory is read and engine health is checked before the software.
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Book
Tell us about your car and your goals; we'll plan the day and time together.
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Analysis & backup
Fault memory is read, the ECU is identified and the original software is archived.
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Legend Tuned software
Calibration tailored to the car (Stage 1: ~1–2 hours).
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Test & handover
Verified with a road test + datalog, then handed over with a walkthrough of what was done.
BMW Z4 (E85/E86)
Other engines in the same generation
- Petrol 2.0i (N46) 150 → 165 HP +15
- Petrol 2.2i (M54) 170 → 185 HP +15
- Petrol 2.5i (M54) 192 → 210 HP +18
- Petrol 2.5si (N52) 218 → 235 HP +17
- Petrol 3.0i (M54) 231 → 246 HP +15
- Petrol 3.0si (N52) 265 → 280 HP +15
Other Z4 generations
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