6.6-liter Duramax L5P V8: OHV – 32 valves, 4 per cylinder, mechanical roller lifters.6.7-liter Cummins Diesel I6: OHV – 24 valves, 4 per cylinder, solid lifter camshaft.6.6-liter Duramax L5P V8: 403 cubic inches.6.7-liter Cummins Diesel I6: 408 cubic inches.The Duramax leads with horsepower, but the Cummins is the king of torque with numbers up to 1,000 ft-lbs depending on the truck. The current Cummins engine is a 6.7-liter inline-six, while the Duramax is a 6.6-liter V8. Historically, horsepower has swayed slightly in favor of the Duramax versus the Cummins line. The current 6.7L 24V Ram Cummins diesel engines produce 400 horsepower. The current Duramax 6.6L L5P diesel wins this category with 445 horsepower. More horsepower means faster acceleration whether you’re towing or not. HorsepowerĮven though torque ranks highest in importance for towing, horsepower isn’t far behind. Since then, both engines have maintained similar specs once their history began to intersect. But by mid-2007, the 5.9-liter Cummins output a total of 610 pound-feet of torque while the Duramax 6.6L LMM put out 650 pound-feet of torque. The Nissan Titan XD with a Cummins 5.0-liter diesel makes 555 pound-feet of torque, and the Cummins 6.7-liter diesel in a 2018 Ram Heavy Duty truck makes 930 pound-feet of torque.īetween 20, the Duramax 6.6L LB7 produced a segment-leading 520 pound-feet of torque. How much torque is produced by Duramax or Cummins diesel engines varies greatly from engine to engine and truck to truck.įor example, a 2018 GMC Sierra HD with a Duramax 6.6-liter diesel produces 910 pound-feet of torque. To do this, you need torque – and a lot of it! Diesel engines have the ability to produce torque on a much higher level than gas engines. Many people buy diesel trucks to tow heavy items like boats, horse trailers, campers, and heavy equipment. The latter engine lasted until 2016 when the Duramax L5P replaced it to add more power. The Duramax LMM came out in mid-2007 and the LML came out in 2011. The Duramax LLY and LBZ engines came out in 20 respectively. The Duramax has seen several updates since its initial release. New LB7 Duramax parts included a high-pressure, common-rail Bosch CP3 injection pump, which was something that the Cummins engine didn’t start using until 2003. The first generation of Duramax came out in 2001 and offered 520 pound-feet of torque. The Duramax engine got started with a partnership between General Motors and Isuzu. It offered as much as 650 pound-feet of torque while also being fifty percent quieter. Although many 6.7 Cummins parts were similar to the 5.9 Cummins parts, the new engine was designed to meet changing emissions standards. In 2007, the 6.7-liter replaced the 5.9-liter Cummins diesel. Even though both Ford and Chevy had diesel engines at this time, the Cummins diesel revolutionized the market by offering a turbocharger, direct injection and 400 lb-ft of torque things Ford and Chevy did not offer. The first Cummins diesel in Ram trucks was the 5.9-liter six-cylinder turbodiesel that put out 400 pound-feet of torque. If you’re looking for a diesel engine with a long history, then Cummins fits the bill. On the other hand, GM’s Duramax got started barely 20 years ago in 2001. Chrysler Corporation began putting Cummins engines in its Ram trucks in 1989. The Cummins engine has over 100 years of history, which is quite a bit longer than the Duramax. Let’s take a look at what makes them tick. Duramax and Cummins engines have differences and similarities. One engine is not necessarily better than the other. Which engine should you choose? This may sound like an oversimplified answer but it largely depends on what you want. Cummins diesel engines are primarily in the Ram truck line which is owned by Fiat Chrysler, but you’ll also find them in the Nissan Titan line of trucks. You’ll find Duramax diesel engines across the General Motors line, including Chevy. Two of the top names in the American diesel truck industry are Duramax and Cummins.
0 kommentar(er)
