How much horsepower does a Cummins ISX have
Michael Henderson
Published Mar 27, 2026
The ISX engine makes 430-620 hp with a maximum 2050 lb-ft of torque. The QSX engine produces 375-665 hp with a maximum 1875 lb-ft of torque. Cummins briefly produced a version of the ISX especially for RV applications which made 650 hp at 1950 lb-ft of torque.
How long will a Cummins ISX last?
Low maintenance: An ISX15 engine can run up to 15,000 miles between oil and filter changes.
How many liters is a Cummins ISX 450?
The 450 hp with 1650 lb. -ft. of peak torque provides performance on the same level as 15.0L and 13.0L engines but at a much lighter weight, which means more payload capacity, according to Cummins. The 450-hp 1450/1650 lb.
Is the ISX 15 a good engine?
Is The Cummins ISX A Good Engine? The engine is a workhorse but not without its issues. The Cummins ISX Engine first debuted in 2001 replacing the popular N14 Series. The Cummins N14 was a fantastic engine and beloved by diesel fans for many years.What is the most powerful Cummins truck engine?
The new 4000 hp QSK95 is the highest horsepower diesel engine ever developed by Cummins. With an output of 4000 hp and more, Cummins’ new QSK95 is the world’s most powerful high-speed diesel engine.
Can you replace a Cummins ISX with a Cummins n14?
Yes it could be done but in my part of the world a good junk yard n14 will bring more than a isx with one variable the 2003 engine is more desirable than a later isx.
What does ISX stand for Cummins?
The ISX was originally called the “Signature” series due to the revolutionary fuel system known as the “Interact System” The IS in ISX stands for the Interact System and is in use for on-highway applications.
What's the best semi truck engine?
- 300 HP Mack – What a tough reliable engine these Mack engines were. …
- 350 Cummins – The 350 Cummins and the Big Cam Cummins engines were reliable but not especially good on fuel economy.
- Big Cam Cummins.
What is the difference between ISX15 and X15?
The ISX platform had only one 15-liter option, the X series offers two: The fuel-friendly X15 “Efficiency” Series geared toward line-haul and regional markets, and the X15 “Performance” Series, built specifically for heavy-haul, RV and other demanding applications.
How much does a Cummins ISX weight?Advertised Horsepower385-600 HP (287-447 kW)Oil System Capacity14 U.S. Gallons (52.9 Litres)System Weight3093 LB (1403 KG)Engine (Dry)3021 LB (1370 KG)Aftertreatment System*72 LB (33 KG)
Article first time published onHow much horsepower does a Cummins X15 have?
Advertised Horsepower525-565 hp 391-421 kWClutch Engagement Torque1000 lb-ft 1356 N•mNumber of Cylinders6System Weight3152 lb 1430 KgEngine (Dry)2961 lb 1343 Kg
Where are Cummins ISX engines made?
However, the current High Output and standard 6.7-liter ISB inline-six oil burners in Ram’s 2500/3500 heavy-duty pickups and 3500/4500/5500 chassis cabs are built to medium-duty specifications. They’re made at the Columbus Midrange Engine Plant (CMEP) just south of Cummins’ world headquarters in Columbus, Ind.
How many liters is ISX15?
Except for white or black lettering and gloss or matte paint, X15 Efficiency (left) and Performance diesels look much alike. Displacement remains at 14.9 liters, like current ISX15 models. For line-haul and regional applications, the X15 Efficiency series offers ratings of 400 to 500 hp and 1,450 to 1,850 lb-ft.
How much HP can a Cummins handle?
The forged steel connecting rod found in ’89-02 5.9L Cummins mills is stout to say the least. They’re known to be capable of handling in excess of 1,000 hp at near-stock compression ratios before bending, and we’ve even seen the block split before the rods failed in several engines.
What year Cummins is best?
Known for its reliable Cummins engine and its power, Rams have been the favorite truck of diesel drivers since the 1980s. The truck has gone through many changes over the last 50 years, with some years being better than others. The best years for Dodge diesel trucks are 1996-1998, 2006-2007, and 2010-2011.
What is a Paccar engine?
The PACCAR MX engine generates up to 485hp with excellent performance across a wide range of engine speeds. In addition to performance excellence, PACCAR pioneered the design and manufacture of high-strength compacted graphite iron (CGI) used in the MX engine block and cylinder head.
What is the difference between ISX and QSX?
The QSX is the off-highway version of the ISX with the Q standing for Quantum. The QSX is used for industrial, marine, oil & gas and other off-highway applications. Cummins also produced a 650 hp and 1950 lb-ft version for the RV market.
Is Paccar engine good?
The PACCAR MX engine is known for quiet and smooth operation, durability, fuel economy and its power curve. It’s the recipe for success for fleets looking for high performance.
How much torque does a Cummins ISX have?
The ISX 425 ST delivers 1,550-1,750 lb ft of torque, the company announced. The higher torque ratings will allow drivers to remain in top gear longer, thus maintaining better road speeds and shifting less frequently on grades, Cummins officials said.
How much horsepower does a N14 Cummins have?
Cummins N14 Horsepower The Cummins N14 is capable of producing between 310 and 525 horsepower. The N14 is capable of generating 1,250 to 1,850 foot-pounds of torque at 1,200 RPM. Cummins released the upgraded N14 in 1997.
Which is better Cummins or Caterpillar?
In terms of fuel efficiency, Cummins’ engines are 6% better than Caterpillar . That’s not the only area where CMI’s coming out on top. It’s taking share from CAT in other heavy-duty engines as well. Cummins is taking share from all its competitors, actually, as it’s now the largest supplier to Paccar .
How much horsepower does a 855 Cummins have?
Cummins 855 SpecsEngine DataMax Horsepower605 HP @ 1800 RPMMax Torque Ratio1,118 ft-lbs @1800 RPMGoverned Speed1800 RPMCylinders6 Inline
How much does a Cummins X15 cost?
Year2018Make / ModelCUMMINS X15TypeTruck EnginePrice$21,500Stock Number004735
How much is a new Cummins X15?
Price$24,000Stock #S1017VIN80036888
Where is Cummins X15 made?
That being said the X15 is an impressive engine. The engine, along with the smaller X12 series, enters into limited production in Jamestown, New York in late 2016 with full production starting after the first of the year.
What big rigs use Cummins?
- VNL 300.
- VNL 400.
- VNL 740.
- VNL 760.
- VNL 860.
- VNX 300.
- VNX 400.
- VNX 740.
How much HP do semi trucks have?
On average, semi truck horsepower ranges from 400 to 600 hp, while average lb-ft of torque ranges from 1,000 to 2,000. Unlike passenger car engines, semi truck engines should only be stopped to change the oil or perform engine services, due to anti-idle laws.
What big rig has the most horsepower?
Unique performance and fuel economy The Volvo FH16 with 700 horsepower is the world’s most powerful truck. It is built for the most demanding haulage assignments. Despite its 700 horsepower, there is no increase in either its emissions or fuel consumption.
What liter is the Cummins ISX?
While the ISX platform has only one 15-liter starting option, the X series offers two: The fuel-sipping X15 Efficiency Series geared toward line-haul and regional markets, and the X15 Performance Series, built specifically for heavy-haul, vocational and other demanding applications.
How many cylinders is ISX15 Cummins?
Advertised Horsepower400-600 hp (298-447 kW)Clutch Engagement Torque1000 lb-ft (1356 N•m)Number of Cylinders6
What is an X15 Cummins?
The X15 Efficiency Series produces up to 500 HP with advanced fuel- saving technology that includes dynamic electronic controls with ADEPT features, enhanced engine breathing and an optimized combustion process that leverages Cummins’ proprietary VGT™ Turbo and XPI fuel system. …