ChiptuneMAP
ChiptuneMAP/BMW/Z8/4.0i - 400ch
BMW

4.0i - 400ch Tuning

BMW Z8: detailed power and torque gains by stage.

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Stage 1 for your Z8: garage prices

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Gains by stage(4)

Power

400 hp

Torque

500 Nm

Petrol
Power
400→415hp
+15 hp
+4%
Torque
500→525Nm
+25 Nm
+5%
OriginalTuned

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Tuners · ChiptuneFILE

Stage 1 file for the 4.0i - 400ch

Send the ECU read, get back an optimised and tested file.

  • Stage 1, Stage 2, E85
  • Checksum corrected, original file kept
  • For professionals only
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Everything about 4.0i - 400ch tuning

Tuning the 4.0i - 400ch found in the BMW Z8 is one of the most popular performance upgrades. This engine offers excellent potential for power and torque gains.

On ChiptuneMAP, find verified gain data for each stage, compare tuner prices and find the ideal professional for your project.

Gains summary by stage

On the BMW Z8 4.0i - 400ch, tuning delivers up to +60 hp and +80 Nm depending on the stage. Stock vs tuned figures:

StagePowerTorqueIndicative price
Stage 1400 → 415 hp500 → 525 NmOn quote
Stage 2400 → 460 hp500 → 580 NmOn quote
E85 Flexfuel400 → 400 hp500 → 500 NmOn quote
E85+400 → 415 hp500 → 525 NmOn quote

Frequently asked questions

What gains can I expect from tuning the 4.0i - 400ch?
Tuning the 4.0i - 400ch (BMW Z8) delivers significant power and torque gains depending on the chosen stage. Stage 1, with no hardware modifications, offers the best gain-to-reliability ratio.
Is tuning reliable on the 4.0i - 400ch?
Yes, the 4.0i - 400ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a professional, experienced tuner with maps tailored to your engine.
How much does BMW Z8 tuning cost?
Prices vary by stage and tuner. Check our directory to compare rates from professionals near you.
Should I get a tuning box or an ECU remap?
ECU remapping (modifying the engine control unit map) delivers better results and integration than a plug-in tuning box. It's customized for each engine.
How do I find a tuner for my BMW Z8?
Use the ChiptuneMAP directory to find a tuner near you. Compare prices, services and specialties.

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