Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm — Stage 1 file (+50 hp)

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Chip tuning for Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm ECU

Cummins Marine QSB (I) QSB480 5.9 480hp (353kW) 1278Nm — marine diesel engine of the marine segment of the Cummins Inc. group (США, 1919). Stage 1 chip tuning raises power from 480 to 530 hp (+50 hp, +10%) and torque from 1278 to 1360 Nm (+82 Nm).

Cummins Marine is the marine division of Cummins, specialising in diesel engines for vessels. The top Cummins ISX marks the power ceiling for American trucks. The Cummins CM850/CM870/CM2350 ECUs are a proprietary platform. DPF/SCR with AdBlue is standard on modern Cummins engines.

Cummins confidently reaches Stage 2 with hardware (turbos, injectors). The Cummins ECU is a locked platform requiring specialised tooling. EFILive, MM3 and MiniMax are the main tools for Cummins (not the standard WinOLS). The top Cummins ISX engines mark the power ceiling of the American truck segment.

Frequently asked questions

What is the Stage 1 effect on the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm?

Stage 1 for the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm adds +50 hp — power increases from 480 to 530 hp (+10%). Torque rises from 1278 to 1360 Nm (+82 Nm).

What does a Stage 1 remap of the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm include?

Stage 1 on the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm is a software ECU calibration with no hardware changes. The key maps (boost/ignition/lambda/torque) are adjusted while factory tolerances are preserved. The gain is +50 hp with no hardware changes.

What does Stage 1 give on the top-spec Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm?

On the top-spec Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm engine, Stage 1 is the starting point before Stage 2 with a downpipe, intake and a larger intercooler. The mass-market factory calibration leaves substantial headroom for an aggressive software tune.

How does Stage 2 differ from Stage 1 on the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm?

Stage 2 for the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm is Stage 1 plus hardware changes: a downpipe, a larger intake and a performance intercooler. The gain is considerably higher, but it requires professional component selection.

Does Stage 1 void the warranty on the Cummins Marine QSB?

Stage 1 on the Cummins Marine QSB voids the factory warranty on the engine and transmission — this is standard for all manufacturers. CHIPOK provides its own warranty on the quality of the remap.

How quickly is chip tuning of the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm done?

The full remap cycle for the Cummins Marine QSB — from reading to writing the final file — takes 30-90 minutes depending on the ECU access method. The file is prepared at CHIPOK in 5-30 minutes.

Can you return to stock after Stage 1 on the Cummins Marine QSB?

The original Cummins Marine QSB ECU is always saved before flashing. Rolling back to the factory firmware is done with the same programmer in 25-30 minutes.

How much does Stage 1 cost for the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm?

The cost of Stage 1 for the Cummins Marine QSB QSB480 5.9 480hp (353kW) 1278Nm is calculated in the calculator on this page — you select the options (DPF off, EGR off, AdBlue off, DTC off, etc.) and the price is capped by the package Max Price. Payment is by credits (1 cr = 1 €), with no subscriptions.

Last updated: 31.08.2026 · Source: manufacturer technical documentation · Measurements: CHIPOK dyno