2-MP8-455C.pdf
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- Competitive Selection OH|DOT04426-5
- Contract number
- DOT04426-5
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- Ohio
About this file
This document is a product information sheet for the Mack Trucks MP8-455C MaxiCruise Diesel Engine for the US market, dated August 5, 2021. It is a technical specification document from Mack Trucks, Inc. detailing the technical specifications, performance characteristics, and features of a specific diesel engine model.
The MP8-455C is a 6-cylinder, in-line diesel engine with a 13-liter displacement, featuring advanced technologies such as an 18:1 compression ratio wave piston, electronic common rail fuel injection, and CLEARTECH ONE aftertreatment system. The engine delivers a peak horsepower of 455 [339] kW at 1400-1700 RPM, with a peak torque of 1750 [2373] Nm at 1000-1300 RPM. Key features include a variable geometry turbocharger, dual-butterfly EGR valve, and an eccentric-style fuel supply pump. The engine weighs approximately 2,711 lbs [1,230 kg], has a total oil capacity of 37 quarts, and includes features designed to improve combustion efficiency, reduce emissions, and enhance overall engine performance.
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1001840 MP8-455C, MAXICRUISE DIESEL ENGINE – US '21
Updated: August 5, 2021
© 2021 Mack Trucks, Inc. Information is correct at time of publication and is subject to change without notice. If you see information you believe to be incorrect or incomplete, please contact Sales Engineering at 1-800-868-6225. For the most current and accurate information, always refer to MSS for the electronic version of this document.
Product Information
Performance summary
Torque and Power Curves:
Gearing Recommendations / Recommended Cruise RPM
Proper gearing is essential to achieve optimum vehicle performance and economy. Vehicle specifications including engine, transmission, axle ratio, and tires should be selected to meet minimum startability and gradeability recommendations while balancing performance and economy with customer requirements. Dealers should refer to the PAWS Performance Predictor to gauge compliance to vehicle-specific minimum recommendations.
Recommended Cruise RPM: 1100 – 1300
550 750 950 1150 1350 1550 1750 1950
Fl yw he el
T or qu e
(lb -ft
Engine Speed (rpm)
550 750 950 1150 1350 1550 1750 1950Fl yw he el
P ow er (H
P)
Engine Speed (rpm)
Peak HP [kW] 455 [339] @ 1400-1700 RPM
HP [kW] at governed RPM 206 [154] @ 2100 RPM
Peak torque lb. ft. [Nm], 1750 [2373] @ 1000-1300 RPM
Clutch engagement lb. ft. [Nm] 860 [1165] @ 800 RPM
Operating range 550 – 2100 RPM
© 2021 Mack Trucks, Inc. Information is correct at time of publication and is subject to change without notice. If you see information you believe to be incorrect or incomplete, please contact Sales Engineering at 1-800-868-6225. For the most current and accurate information, Features and benefits
18:1 CR wave piston, 220 bar peak cylinder pressure
Our patented Wave piston delivers improved combustion and lower friction, resulting in cleaner emissions and better fuel economy. Six steel waves forged into the piston crown optimize fuel injection for increased combustion efficiency.
Electronic common rail fuel injection
The simplicity of Mack’s electronic common fuel rail system eliminates external high-pressure lines as can be common with “one pump” common rail systems. This direct injection system delivers ultra-precise control over fuel injection pressure, timing and volume. The result is more power and efficiency, with less engine noise.
Intake throttle
MP Series engines are equipped with intake throttles that improve heat management, helping to increase the exhaust gas temperature at idle and low load, increasing the efficiency of the exhaust aftertreatment.
Dual-butterfly EGR valve The MP8 Dual-butterfly EGR Valve reduces fuel consumption through higher EGR flow rates compared to other systems that incorporate single-poppet style EGR valves.
CLEARTECH™ ONE
aftertreatment
Mack’s re-engineered exhaust aftertreatment system is designed for MP series engines and features a sophisticated new design that delivers near-zero emissions and low maintenance in a lighter, more compact unit
© 2021 Mack Trucks, Inc. Information is correct at time of publication and is subject to change without notice. If you see information you believe to be incorrect or incomplete, please contact Sales Engineering at 1-800-868-6225. For the most current and accurate information, Base engine specifications: All engine specifications are listed for the base engine model and do not include specifications found in optional engine equipment.
Number of cylinders & firing order 6, In-Line: 1 – 5 – 3 – 6 – 2 – 4
Bore and stroke, inches [mm] 5.16 X 6.22 [131 X 158]
Displacement, cubic inches [L] 780 [13]
Compression ratio 18:1
Torque rise 34.0% Idle speeds:
Low Adjustable, 650 RPM
High 2100 RPM
Engine brake retarding power 475 HP [355 kW] @ 2250 RPM
Weight, dry [approximate] lbs. [kg] 2711 [1230]
Fuel filter Spin-on, disposable
Fuel system High pressure F2 common rail
Fuel supply pump Eccentric-style pump (no lifters or tappets)
Lubrication system:
Type Full pressure, wet sump
Oil filters 2 Spin-on full flow, disposable
Oil cooler Stainless steel plate
Total oil capacity, includes filters 37 quarts [35 liters]
Drain plug Magnetic
Turbocharger Variable geometry turbocharger with journal bearings
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