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ISZ525-40B Automotive Engine

DCEC L300-20 automotive engine is a 6-cylinders in line, 8.9 liter four-strokes engine with 114mm bore and 145mm stroke, equipped with Bosch P7100 pump and RQV-K governor. DCEC L300-20 automotive engine comes with turbocharger and Air-Air intercooler, with a EURO II post-processor.

The prime power at 2200RPM of DCEC L300-20 automotive engine is 300 HP.

As part of EMAC, DuraMac provides complete powertrain that integrated with DCEC engine, Fast-Eaton clutch, FAST-CAT transmission, Dongfeng-DANA axle and Komman air suspension, while the electrification of automobile is the certain future, Duramac also get involved with EV powertrain system.

We provide full life cycle services for all customers, from design to power system supply, from installation to commissioning, from after-sales service training to spare parts supply, from trouble shooting to overhaul technical support.

Advantages of DCEC ISZ525-40B Automotive Engine

  • Lower oil consumption,Extended stroke,the expansion of the combustion gas more fully, Increase effective efficiency output, the economy is better.

  • Strong power,advanced 4 air valves structure, greater horsepower, air burning more thoroughly, while making low speed torque increase, quicken response speedily, climb strongly.

  • Excellent reliability, with compulsive cold cut articulated pistons, Can bear extreme high mechanical load and heat load, Strength can be comparable with heavy engine.

  • Better emissions, Decorate injector and symmetrical combustion chamber in center, make the cylinder is more homogeneous mixture, burning more fully, lower emissions.

  • Super life, 30% engines 800,000 km without overhaul.

  • Excellence power, Clean burning, use the advanced lean-burn closed loop electronic control system.

  • Excellent cold start performance, equipped with air suction electric preheater and 7.8 kw power starter, completely improve the cold start performance of the engine. Through the arctic village-MoHe of China-36°C extreme low temperature validation.

Technical Specifications

Engine Model: ISZ525-40B
Engine Type:6
Displacement:13 L
Rated Speed:2100 RPM
Rated Power / Speed:391 kW @ 2100 RPM
Peak Torque:2508 N.m @ 1200 RPM
Fuel System:XPI Fuel System
Aspiration Method:Turbocharged & Air-Air Intercooler
Emission Standard:N/A
Bore*Storke:130 mm * 163 mm
Packing Size(L*W*H):N/A
Wet Weight:1260 kg
Lead Time:15-30 Working Days
Payment Terms:T/T ,L/C

coming soon

Engine Model

Advertised Power

Peak Torque

Number Of Cylinders

 Fuel System

ISZ425-40A425 HP @ 2100 RPM1966 N.m @ 1600 RPM6 CylindersXPI Fuel System
ISZ425-40B425 HP @ 2100 RPM1966 N.m @ 1200 RPM 6 CylindersXPI Fuel System
ISZ425-41424 HP @ 2100 RPM2016 N.m @ 1000-1400 RPM 6 CylindersXPI Fuel System
ISZ450-40A456 HP @ 2100 RPM2237 N.m @ 1600 RPM 6 CylindersXPI Fuel System
ISZ450-40B450 HP @ 2100 RPM2237 N.m @ 1200 RPM6 CylindersXPI Fuel System
ISZ450-41450 HP @ 2100 RPM2338 N.m @ 1000-1300 RPM6 CylindersXPI Fuel System
ISZ460-51450 HP @ 2100 RPM2338 N.m @ 1000-1300 RPM6 CylindersXPI Fuel System
ISZ520-41450 HP @ 2100 RPM2338 N.m @ 1000-1300 RPM6 CylindersXPI Fuel System
ISZ525-40A525 HP @ 2100 RPM2509 N.m @ 1600 RPM6 CylindersXPI Fuel System
ISZ525-40B525 HP @ 2100 RPM2508 N.m @ 1200 RPM6 CylindersXPI Fuel System
ISZ525-40C525 HP @ 2100 RPM2508 N.m @ 1200 RPM6 CylindersXPI Fuel System

General Infomation of DCEC ISZ525-40B Automotive Engine

Engine ModelISZ525-40BAdvertised Power525 HP @ 2100 RPM
Peak Torque2508 N.m @ 1200 RPMCurve&DatasheetFR 20241
Fuel SystemXPI Fuel SystemNo. Of Cylinders6
AspirationTurbocharged & Air-Air IntercoolerDisplacement13 L
Bore*Storke130 mm * 163 mmCPL Code Revision43354
Dry Weight 1195 kgWet Weight 1260 kg
Compression Ratio17:01

Installation Data of DCEC ISZ525-40B Automotive Engine

Center of Gravity. Distance From Front Face of Block519 mm
Center of Gravity. Distance Above Crank Centerline(Above Crankshaft)201 mm
Maximum Bending Moment At Rear Face of Block1356 N.m
Maximum Crankshaft Thrust Bearing load limit- Intermittent load9786 N
Maximum Crankshaft Thrust Bearing load limit-Continuous load4893 N
Instantaneous Inertia At Rotating: (Without Flywheel) N/A
Emissions CertificationGB 17691-2005
Idle Speed600-800 RPM
Maximum Non-Load Speed2300 RPM
Over Speed Performance (Within 15 Seconds)2625 m
The Clutch Torque @ 800Rpm1152 N.m
Maximum Altitude At Which Continuous operation Is Allowed5200 m
Supercharger outlet Exhaust Pressure limit Value N/A
Maximum Power of Exhaust BrakeN/A

Engine Performance Data Rated power of DCEC ISZ525-40B Automotive Drive Engine

Governed Speed Peak Power Speed Peak Torque Speed
Engine Speed2100 RPM1600 RPM1200 RPM
Oil Pressure276 kPa259 kPa248 kPa
The Air Flow33.2 m³/min28.9 m³/min19.6 m³/min
The Flow Rate of Pressurized Air38.1 kg/min34 kg/min23 kg/min
Pressurized Air Pressure203 kPa236 kPa199 kPa
The Exhaust Flow73.3 m³/min69.9 m³/min51.5 m³/min
Exhaust Temperature487 525 531
Fuel Consumption85.3 kg/hr84.8 kg/hr62.6 kg/hr
Coolant Flow510 l/min390 l/min294 l/min
Heat Loss Coolant172 kW165 kW137 kW
Heat Loss Air81 kW80 kW50 kW
Mechanical Loss of Power58 kW29 kW25 kW

System Technical Data of DCEC ISZ525-40B Automotive Drive Engine

Air Intake SystemMaximum Temperature Rise Between Ambient Air And Engine Air Inlet11.1
Maximum Intake Restriction With Dry Type Air Cleaner,With Clean Filter-Medium Duty6.2 kPa
Maximum Intake Restriction With Dry Type Air Cleaner,With Clean Filter-Heavy Duty2.5 kPa
Maximum Intake Restriction With Dirty FilterN/A
Turbocharged & IntercooledMaximum Intake Temperature Rise Between The Environment And The Intake ManifoldN/A
Maximum Allowable Pressure Difference Before And After Intercooling-Three-LevelN/A
Minimum Inlet Pipe Diameter Allowed-Three-LevelN/A
Exhaust SystemMaximum exhaust back pressurekPa 21 kPa
Maximum allowable static bending moment at turbocharger exhaust outlet flangeN.m27 N.m
Maximum Static Bend Allowed For Turbocharger Exhaust Flange125 mm
Lubrication SystemOil Pressure @ idle – ( Minimum) (kPa)89.6 kPa
Total System Capacity (litre)45.42 L
Maximum Lube Oil Flow to all Accessories ( liter/min)7.57 l/min
Maximum Oil Pressure Spike on a Cold Engine (kPa)N/A
Typical Oil Pressure Range on a warm engine (kPa)207-345 kPa
Cooling SystemCoolant Capacity – Engine only23.1 L
Standard Thermostat (Modulating) Range82-94
Minimum Fill Rate ( Without Low Level Alarm)19 l/min
Minimum Coolant Expansion Space – % of System Capacity6%
Water Tank Capacity Without Water ExpansionN/A
Maximum Coolant Pressure (Without Pressure Cap, Thermostat Closed)40.7 kPa
Maximum Degassing Time25 mins
Maximum Coolant Flow To AccessoriesN/A
Maximum Coolant Temperature Engine out107
Minimum Allows Pressure of Pressure Cap50 kPa
Minimum Recommended Coolant Temperature70
Common Operating Temperature Range of Fans With Fan Clutch95
Maximum Coolent Temperature For Engine Protection Control103
The Limit Environmental Temperature At Rated SpeedN/A
The Limit Environmental Temperature At Peak TorqueN/A
24V Electrical SystemMaximum Allowable Resistance of Cranking CircuitN/A
The Cold Start Current When Engine And The Clutch Separate900 CCA
Cold Starting SystemMaximum Unaided Cold Start Temperature-15
Maximum Aided Cold Start Temperature-30
Fuel SystemMaximum Fuel Return Resistance27 kPa
Maximum Inlet Resistance of oil Pump With Clean Filter13.5 kPa
Minimum Discharge Capacity Of Mailbox5.36 kg/hr
Maximum design fuel flow (kg/hr)204 kg/hr

Scopes of Supply of DCEC ISZ525-40B Automotive Engine

Air Intake System1. Air Intake ManifoldExhuast System1. Exhuast Manifold
2. Water-air Intercooler2. Turbocharger
3. N/A3. Exhuast Elbow
Fuel System1. Fuel transfer pumpStarting System1. Starter motor
2. High-pressure fuel pump2. Starter rely
3. Fuel Filter3. N/A
Charging System1. Charging alternatorEngine Shut-Down System1. Engine fuel shut-off solenoid
Lubricating System1. Oil pumpCooling System1. Water pump
2. Oil filter2. Engine Fan
3. N/A3. Standard radiator
Power Output System1. FlywheelEngine Mounting System1. Engine Mouting Bracket
2. Standard flywheel housing2. N/A
Engine Auiliary Accessories1. Air compressor
2. Power steering pump

Optional Accessories of DCEC ISZ525-40B Automotive Engine

Air Intake System1. Air Intake pre-heaterExhuast System1. Muffler & bellows
2. Air intake shut-off valve2. Flame trap
3. Air filter3. Spark arrestor type Muffler & bellows
4. Air intake pre-filter4. DPF system
5. Air filter alarm system5. N/A
Fuel System1. Coarse FilterStarting System1.Manual Magnetic DC Contactor
2. Fuel pre-heater2. Dual ears flywheel housing
3. N/A3. Spring Starter Motor
4. N/A4. Air Starter Motor
5. N/A5. Hydraulic Starter Motor
Lubricating System1. Oil pre-heater.Cooling System1. Silent Type Radiator
2. N/A2. Plateau Radiator
3. N/A3. Salt-Spray Resistant Radiator
4. N/A4. Coolant pre-heater
Power Output System1. ClutchEngine Mounting System1. Shock absorber pad
Engine Auiliary Accessories1. Hydraulic oil pumpControl System1. Can add mechanical accelerator pedal
2. Air conditioner compressor2. N/A
3. N/A3. N/A

As part of EMAC, DuraMac is Committed to providing reliable powertrain system to commercial vehicle manufacturers around the world, a sub-brand of EMAC group that focusing on automotive application. Based on dozens of world-class engine manufacturing resources in China, and as official exporting agent of Fast tranmission (Joint venture with Caterpillar AT tranmission), Dongfeng Dana axle and Komman air suspension, DuraMac provides one-stop solutions covers from pre-design to components supply, from installation to commissioning, from pre-sales communication to after-sales service support. For more information of our automotive power system products, you are welcome to visit DuraMac homepage:

Modifiable Components of DCEC ISZ525-40B Automotive Engine

Air Intake System1. Installation position of air filterExhuast System1. Can modify installation position and direction of
2. Upgrade to  heavy-duty type air fitlerturbocharger
3. N/A2. Water-cooled exhuast manifold
4. N/A3. Water-cooled turbocharger
Fuel System1. Upgrade to fuel fitler that integrated with fuel transferStarting System1. 12V starter motor for 12v electric system
pump and fuel pre-hearter2. Upgrading to specified brand and speicifications of
2. N/Astarter motor
Charging System1. 12V charging alternator for 12v electric systemEngine Shut-Down System1. 12V solenoid for 12v electric system
2. Explosion-proof charging alternator2. Explosion-proof solenoid
3. Upgrading to specified brand and speicifications of3. N/A
charging alternator4. N/A
Lubricating System1. Oil Pan positionCooling System1. Can modify engine fan into blower fan or suction fan
2. Number of dipstick2. Can modify central position of engine cooling fan
3. Position of dipstick can choose from 6 positions3. Can choose type of engine fan from mechanical type or
4. Can modify oil filter to be remote installationelectric type
Power Output System1. Can modify size of flywheel housing and flywheel.Engine Mounting System1. Can modify engine mouting bracket.
2. Dual-ear flywheel housing (For twin-starter system)2. N/A
3. Some of models can modify flywheel housing into PTO3. N/A
integrated type.4. N/A
4. Engine have connecting port of PTOs, that able to5. N/A
provide power output.6. N/A
Engine Auiliary Accessories1. All of auxiliary system can choose specified brands and
2. Additional auxiliary systems can be added for special

Note: All Above Data are Just for Reference, All Data Might Change Without Notices or Updates, Please Contact Our Sales Team to Confirm All Details Via WhatsApp or Email.

The picture of Sale Manual showing the accessories and scopes of supply.

Engine Sale Manual

The picture of Installation Drawing showing the accessories and scopes of supply.

Installation Drawing

The picture of Installation Manual showing the accessories and scopes of supply.

Installation Manual

The picture of Operation Manual showing the accessories and scopes of supply.

Operation Manual

The picture of Engine Parts Catalogue showing the accessories and scopes of supply.

Parts Catalogue

The picture of Test Report and Certifcate showing the accessories and scopes of supply.

Report & Certifcate

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