CCEC QSK38 Generator Drive Engine — 876–1,231 kW (1,095–1,720 kVA)
The CCEC QSK38 series is the electronically controlled, high-pressure common-rail evolution of the legendary KTA38 V12 platform, built by Chongqing Cummins Engine Co. (CCEC). This 37.7-liter, 12-cylinder V-configuration, four-stroke diesel uses the Cummins CMS MCRS fully electronic fuel system with turbocharging and low-temperature aftercooling, delivering 876–1,231 kW prime power (1,095–1,720 kVA) across 50 Hz (1500 RPM) and 60 Hz (1800 RPM) ratings. It bridges the gap between the inline-six QSK23 and the larger QSK50, making it the go-to V12 solution for 1,000–1,700 kVA generator sets in mining, data centers, oil & gas, and large-scale industrial standby.
QSK38 Generator Engine Models
CCEC produces four QSK38 G-Drive ratings spanning 50 Hz and 60 Hz. Ratings below are published genset outputs (kVA / kW) at 0.8 power factor. Each model carries a specific configuration code and performance curve for genset OEM integration.
50 Hz Models (1500 RPM)
| Engine Model | Prime Power | Standby Power | RPM |
|---|---|---|---|
| QSK38-G1 | 1,095 kVA / 876 kW | 1,095 kVA / 876 kW | 1500 |
| QSK38-G5-A | 1,384 kVA / 1,107 kW | 1,530 kVA / 1,224 kW | 1500 |
60 Hz Models (1800 RPM)
| Engine Model | Prime Power | Standby Power | RPM |
|---|---|---|---|
| QSK38-G5-B | 1,329 kVA / 1,063 kW | 1,329 kVA / 1,063 kW | 1800 |
| QSK38-G4 | 1,539 kVA / 1,231 kW | 1,720 kVA / 1,376 kW | 1800 |
Core Specifications
| Parameter | Value |
|---|---|
| Engine Type | 4-cycle, V-12 cylinder (60° Vee) |
| Displacement | 37.7 L (2,301 in³) |
| Bore × Stroke | 159 mm × 159 mm (6.25 in × 6.25 in) |
| Compression Ratio | 15 : 1 |
| Rated Speed | 1,500 – 1,800 RPM |
| Frequency | 50 Hz / 60 Hz |
| Fuel System | CMS MCRS — high-pressure common rail, fully electronic |
| Aspiration | Turbocharged & low-temperature aftercooled (2-pass / 2-loop) |
| Emissions | U.S. EPA Tier 2 / China Non-road Stage III |
| Rated Power Range | 876 – 1,231 kW @ 1,500 – 1,800 RPM |
| Prime Power Range | 876 – 1,231 kW |
| Genset Output | 1,095 – 1,720 kVA (at 0.8 PF) |
| Dry Weight | 3,825 – 4,100 kg |
| Wet Weight | 4,100 – 4,375 kg |
| Packing Size (L × W × H) | 2,220 × 1,507 × 1,846 mm |
| Starting System | 24V, negative ground |
| Oil Capacity (with filter) | ~170 L (45 US gal) |
| Coolant Capacity (engine only) | ~106 L (28 US gal) |
| Manufacturer | CCEC (Chongqing Cummins Engine Co., Ltd.) |
Key Engineering Features
CMS MCRS Common-Rail Fuel System
The Cummins Modular Common Rail System (MCRS) delivers ultra-high injection pressure with fully electronic control across the entire load range. The result is finer atomization, cleaner combustion, better fuel efficiency, and faster transient response than a mechanical PT pump — meeting EPA Tier 2 without exhaust aftertreatment.
Turbocharged & Aftercooled (TAA)
High-pressure-ratio Cummins turbochargers paired with a low-temperature two-pass aftercooling system keep intake air dense and cool for maximum volumetric efficiency. This sustains full-rated power in high-ambient, high-altitude conditions where naturally aspirated or turbo-only engines lose output.
High-Strength Integrated Block & Head
The V-12 cylinder block and cylinder heads are designed as a high-strength integrated structure to minimize deformation under peak combustion pressure. Six-cylinder-per-bank single-head design with modular construction keeps weight down while maximizing rigidity and service life.
INSITE Diagnostics & Advanced Lube System
Cummins INSITE software provides real-time engine monitoring and fault diagnosis via a Windows-based interface. The lubrication system includes a pre-lubrication module, Centriguard centrifugal filter, CENTINEL continuous oil renewal, and dual-stage Fleetguard combo filter — extending service intervals and reducing startup failures.
The QSK38 ships as a complete matched assembly — engine, turbocharger, aftercooler, and electronic control module — calibrated together for G-Drive genset duty. Shared architecture with the QSK50 (50L) and KTA50 means broad parts commonality for fleets running multiple displacements.
Fuel Consumption (Typical)
Fuel is 70–80% of a generator set’s lifetime operating cost, so right-sizing matters. The figures below are typical estimates for a QSK38-class 37.7-liter V12 common-rail engine at rated speed; exact values vary by model rating, alternator efficiency, ambient conditions, and fuel quality. Request the factory fuel map for your specific model before finalizing a project.
| Load Point | Typical Power (kW) | Fuel Consumption (L/hr, approx.) |
|---|---|---|
| Standby (100%) | ~1,200 | ~310 |
| Prime (100%) | ~1,100 | ~280 |
| Prime (75%) | ~825 | ~215 |
| Prime (50%) | ~550 | ~150 |
Generators run most efficiently at 70–80% load. Running a QSK38 below 30% load for extended periods causes wet stacking and accelerates carbon buildup. If your continuous load is under ~850 kVA, the inline-six QSK23 will burn less fuel; above ~1,500 kVA, step up to the QSK50 or KTA50.
QSK38 vs KTA38 vs QSK23: Selection Guide
The QSK38 sits at the heart of the CCEC V12 lineup — offering electronic precision on a proven 38-liter architecture. Here is how it compares to the mechanical KTA38 and the smaller QSK23 inline-six.
| Feature | QSK23 (Electronic) | QSK38 (Electronic V12) | KTA38 (Mechanical V12) |
|---|---|---|---|
| Displacement | 23 L | 37.7 L | 37.8 L |
| Cylinders | 6 inline | 12 Vee | 12 Vee |
| Fuel System | HPI PT electronic | MCRS common rail | PT + STC mechanical |
| Emissions | Stage II / Tier 2 | Stage III / Tier 2 | Stage II (pre-Tier) |
| 50 Hz Prime Range | 603 – 720 kW | 876 – 1,107 kW | ~560 – 900+ kW |
| Genset kVA Range | 750 – 1,020 kVA | 1,095 – 1,720 kVA | 700 – 1,500 kVA |
| Dry Weight | ~3,185 kg | 3,825 – 4,100 kg | ~3,950 kg |
| Best For | 750–1,000 kVA, simpler inline-six | 1,000–1,700 kVA, electronic V12 | 700–1,500 kVA, mechanical preference |
Choose the QSK38 when you need 1,000–1,700 kVA with electronic fuel control, tighter emissions compliance, and better fuel economy than a mechanical KTA38 — while staying on the same proven V12 architecture with broad parts sharing. For a full comparison of the mechanical K-series, see our NTA855 vs KTA19 vs KTA38 vs KTA50 comparison guide.
Typical Applications
- Mining & quarrying — primary and standby power for haul truck shops, crushers, conveyors, dewatering pumps, and mining camps in high-dust, high-altitude environments.
- Data centers & server farms — 1,000–1,700 kVA standby with MCRS electronic governing, tight frequency regulation, and J1939 integration into UPS and paralleling switchgear.
- Oil & gas — onshore drilling rigs, frac spreads, pump stations, and pipeline compressor stations requiring continuous-duty V12 reliability.
- Heavy industrial standby — steel mills, cement plants, smelters, and paper mills where 1,200–1,700 kVA backup is critical.
- Marine auxiliary power — generator sets on cargo vessels, dredgers, and offshore support vessels.
- Construction & rental fleets — containerized 1,200–1,500 kVA units for large infrastructure projects and disaster relief.
- Prime power — remote & island sites — dependable 24/7 V12 power where the grid is unreliable or absent.
Genuine QSK38 Spare Parts
The QSK38 shares the proven 38-liter V12 architecture with the KTA38, QSK50, and QSK60, giving it one of the broadest parts pools in the CCEC range. We supply the full range of QSK38 spare parts, including the cylinder block (3648402), cylinder head (3991159), piston kit (3803530), turbocharger (3524451), fuel injector (4955526), flywheel (3021394), and ECM (2867198). Browse the full Cummins engine parts center for filters, liners, bearings, and overhaul gasket kits.
Maintenance & Service
| Service Item | Interval (typical) | Notes |
|---|---|---|
| Engine oil & filter | 250–500 hours | API CH-4/CI-4 or higher, 15W-40; dual-stage Fleetguard combo filter |
| Fuel filters / water separator | 500 hours | Drain water regularly; use genuine Fleetguard elements |
| Air filter | Inspect 500 h / replace as indicated | Dry element with restriction indicator |
| Coolant / SCA check | 500 hours | Maintain DCA concentration; check aftercooler circuit |
| Centriguard centrifugal filter | 500 hours | Clean centrifugal rotor; inspect CENTINEL system |
| Valve lash adjustment | 2,000 hours / 2 years | Cold setting per CCEC/Cummins manual |
| ECM / MCRS diagnostic check | At each service | Read fault codes via Cummins INSITE software |
| Major overhaul | 20,000+ hours | Wet liners replaceable; depends on duty cycle |
Frequently Asked Questions
What is the difference between the QSK38 and KTA38?
Both are 37.7-liter V12 engines sharing the same 159 mm bore and stroke, but the QSK38 uses the CMS MCRS high-pressure common-rail system with fully electronic control, while the KTA38 uses a mechanical PT pump with STC timing. The QSK38 meets EPA Tier 2 / China Stage III emissions without aftertreatment, delivers better fuel efficiency, faster transient response, and tighter speed regulation. The KTA38 remains popular in markets where mechanical simplicity is preferred and emissions standards are less stringent.
What genset kVA does the QSK38 produce?
At 50 Hz (1500 RPM), QSK38 ratings span 1,095–1,530 kVA (QSK38-G1 at 1,095 kVA to QSK38-G5-A at 1,530 kVA standby). At 60 Hz (1800 RPM), they span 1,329–1,720 kVA (QSK38-G5-B at 1,329 kVA to QSK38-G4 at 1,720 kVA standby). The top-rated model is the QSK38-G4 at 1,720 standby kVA / 1,539 prime kVA.
What does MCRS mean in Cummins engines?
MCRS stands for Modular Common Rail System. It is Cummins’ proprietary high-pressure electronic common-rail fuel system that delivers ultra-high injection pressure for finer fuel atomization, cleaner combustion, and precise electronic metering across the entire load range. The “modular” designation means the system scales across displacements — the same MCRS architecture is used on the QSK19, QSK38, QSK50, and QSK60.
Is the QSK38 compatible with the KTA38 for parts?
Yes — extensively. The QSK38 shares the same V12 block architecture, bore/stroke, and many rotating and reciprocating components with the KTA38, QSK50, and QSK60. Cylinder blocks, pistons, flywheels, and many internal parts cross-reference across platforms. However, fuel system components (injectors, rail, ECM) are QSK-specific and not interchangeable with mechanical KTA38 parts.
Which applications is the QSK38 best suited for?
It is ideal for 1,000–1,700 kVA generator sets in mining, data centers, oil & gas, heavy industrial standby, marine auxiliary, and remote prime-power sites. The MCRS electronic system gives tighter frequency regulation and cleaner emissions than a mechanical KTA38, while the V12 architecture provides the power density that inline-six engines cannot reach in this kVA range.
What is the lead time for a QSK38 generator engine?
Bare engines typically ship within 15–30 working days. Complete open, silent, or containerized generator sets require 25–45 days depending on alternator brand, controller, enclosure, and destination. We ship worldwide by sea (FOB/CIF/DAP) and can arrange air freight for urgent orders.
Official Resources
Genuine Cummins parts and service information: parts.cummins.com — or browse our full CCEC generator engine lineup.
