Cummins QSX 390 14.95L 371hp (273kW) 1825Nm — Stage 1 file (+103 hp)
hp
Stage 1 file for Cummins QSX 390 14.95L 371hp (273kW) 1825Nm
Target +0 hp. Custom development for your engine.
Chip tuning for Cummins QSX 390 14.95L 371hp (273kW) 1825Nm ECU
Cummins QSX (I) 390 14.95L 371hp (273kW) 1825Nm — industrial diesel engine of the commercial segment of the Cummins Inc. group (США, 1919). Stage 1 chip tuning raises power from 371 to 474 hp (+103 hp, +28%) and torque from 1825 to 2350 Nm (+525 Nm).
Cummins is an American diesel-engine manufacturer, founded in 1919. The Cummins B-Series is an iconic engine line (Dodge Ram, agricultural machinery). The Cummins ECU is a locked platform, tuned through specialised tooling. 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
How much horsepower does Stage 1 add for the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm?
Stage 1 for the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm adds +103 hp — power increases from 371 to 474 hp (+28%). Torque rises from 1825 to 2350 Nm (+525 Nm).
What does a Stage 1 remap of the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm include?
Stage 1 is a software optimization of the factory ECU firmware of the Cummins QSX with no hardware changes. The injection, boost, ignition-timing and torque maps are reprogrammed. The gain is +103 hp with no hardware changes.
Does Stage 1 make sense on the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm with this much power?
On the top-spec Cummins QSX 390 14.95L 371hp (273kW) 1825Nm 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.
What is Stage 2 for the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm?
Stage 2 for the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm 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 the factory warranty of the Cummins QSX remain valid after Stage 1?
After remapping the Cummins QSX, the official factory warranty on the engine and gearbox is lost (this applies to any manufacturer when the ECU is modified). CHIPOK guarantees the quality of the calibration and free revisions.
How long is the wait for a Stage 1 remap for the Cummins QSX?
Reading and writing via OBD takes 25-30 minutes on the Cummins QSX. Bench reading (BDM/JTAG) takes about 60 minutes plus refitting. Remote file processing at CHIPOK takes 5-30 minutes.
How do you roll back to the factory firmware of the Cummins QSX?
Before Stage 1 the original of the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm is read out and saved — returning to the factory state is possible at any time.
How much does chip tuning the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm cost?
The remap price for the Cummins QSX 390 14.95L 371hp (273kW) 1825Nm is dynamic and is calculated in the CHIPOK calculator based on the selected options. A credit-based payment model, with no subscription fees.