Pump Engine
Cummins QSNT Pump Diesel Engine (400–500 hp)
Cummins QSNT 14.0 L 6-cylinder diesel engine, 400–500 hp (298–373 kW), 3 ratings for pump work. Each unit nameplate-verified.
Specifications
- Engine Model
- QSNT-P400S31 ~ P500S30
- Displacement
- 14.0 L
- Cylinders & Configuration
- Inline 6, 4-cycle
- Rated Power Range
- 298–373 kW (400–500 hp) @ 2000–2100 rpm
- Aspiration
- Turbocharged Aftercooled
- Applications
- Pump
- Documentation
- Nameplate verification + load-test record per serial number
Overview
The Cummins QSNT is a 14.0 L 6-cylinder Cummins diesel engine supplied in 3 factory ratings from 400 hp (298 kW) to 500 hp (373 kW). Every rating listed on this page is a complete engine for pump duty, not a generator set, and each unit ships with its serial number recorded against the specification sheet that applies to it.
Ratings in this family differ in rated speed, peak torque and emissions tier rather than in displacement or cylinder count, so the choice between them is a duty-matching question. The specifications panel and the per-rating entries on this page are generated from the same source data, so a rating quoted here can be matched directly against a delivery document.
Specifications
The specifications panel lists the family-level values that are common to every QSNT rating, including the 14.0 L displacement and the inline 6-cylinder layout. Ratings that share displacement and cylinder count but differ in output are listed individually in the model selection section.
Model Selection: QSNT Ratings
Each entry in this section is one rating of the Cummins QSNT. The rated power is the output at the stated speed; the peak torque figure is the value the rating develops at the lower speed shown, which is what normally decides whether a rating suits a given machine. Each rating carries a stable anchor, so a single rating can be linked or quoted directly.
QSNT-P400S31
QSNT-P400S31 — rated 298 kW (400 hp) at 2100 rpm.
QSNT-P450S30
QSNT-P450S30 — rated 336 kW (451 hp) at 2100 rpm.
QSNT-P500S30
QSNT-P500S30 — rated 373 kW (500 hp) at 2000 rpm.
Applications
QSNT engines in this family are normally specified for pump work.
Pump duty: ratings in this family are quoted with the pump curve and the driven speed in view, because a pump absorbs power with the cube of speed, so the governing point rather than the nameplate figure decides the match.
Verification, Documentation and Ordering
Each engine is offered with nameplate verification + load-test record per serial number. That means the model and rating printed on the engine nameplate can be checked against the record issued for that serial number before shipment, which is the point most buyers of re-rated or re-exported engines want covered.
To receive a quotation, send the exact rating from the matrix above (for example QSNT-P500S30), the machine or application it will drive, the quantity, and the destination port. If the rating you need is not listed, send the model and the required output and we will confirm whether it belongs to this family or to a neighbouring one.
Buyer tip: Send your QSNT specification, quantity and destination port for a verified quotation and lead time.
Frequently Asked Questions
What is the power range of the QSNT?
The 3 ratings listed on this page run from 400 hp (298 kW) to 500 hp (373 kW), at governed speeds between 2000 and 2100 rpm.
What displacement and cylinder count does the QSNT use?
Every rating in this family shares the same 14.0 L displacement and inline 6-cylinder, 4-cycle configuration. Ratings differ in output, rated speed and emissions tier rather than in the base engine.
What is the difference between QSNT-P450S30 and QSNT-P500S30?
QSNT-P450S30 is rated 336 kW (451 hp) at 2100 rpm, while QSNT-P500S30 is rated 373 kW (500 hp) at 2000 rpm. They use the same base engine; the higher rating is the one to specify when the driven load needs the extra torque at the lower speed.
How is a QSNT rating ordered?
Send the exact rating shown in the model selection table, the application it will drive, the quantity and the destination port. The engine is then quoted against that rating and confirmed against its nameplate and load-test record.
At what speed is the QSNT rated?
The ratings on this page are governed at 2000 and 2100 rpm. Rated speed fixes the speed the driven machine sees through its gearing, so confirm the governed speed before ordering rather than relying on the power figure alone.
Is the QSNT a complete engine or a generator set?
Every entry on this page is a complete engine. Generator sets and packaged gen-sets are listed separately from this family and are not included here.
