5.0i V8 - 390ch Tuning
Infiniti FX — Detailed power and torque gains by stage.
Gains by stage(4)
Power
390 hp
Torque
500 Nm
essence
Power
390→390ch
Torque
500→500Nm
OriginalTuned
Find a tuner
Compare certified professionals near you.
Everything about 5.0i V8 - 390ch tuning
Tuning the 5.0i V8 - 390ch found in the Infiniti FX 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 Infiniti FX 5.0i V8 - 390ch, tuning delivers up to +40 hp and +50 Nm depending on the stage. Stock vs tuned figures:
| Stage | Power | Torque | Indicative price |
|---|---|---|---|
| Stage 1 | 390 → 390 hp | 500 → 500 Nm | — |
| Stage 2 | 390 → 430 hp | 500 → 550 Nm | — |
| E85 Flexfuel | 390 → 390 hp | 500 → 500 Nm | — |
| E85+ | 390 → 390 hp | 500 → 500 Nm | — |
Frequently asked questions
What gains can I expect from tuning the 5.0i V8 - 390ch?
Tuning the 5.0i V8 - 390ch (Infiniti FX) 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 5.0i V8 - 390ch?
Yes, the 5.0i V8 - 390ch is known for its reliability when tuned, especially at Stage 1. It's essential to use a certified tuner with maps tailored to your engine.
How much does Infiniti FX 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 Infiniti FX?
Use the ChiptuneMAP directory to find a certified tuner near you. Compare reviews, prices and specialties.