Incorporating the latest advancements in Paccar engine technology, the new 11-liter Paccar MX-11 engine is allowing Kenworth customers to reap productivity benefits.
That’s the word from Kurt Swihart, Kenworth marketing director. “The new Paccar MX-11 engine is a great example of an engine that provides our customers with a substantial weight savings, while also driving up fuel economy across a wide range of applications,” he said. “That offers immediate payback for customers in weight-sensitive vocational applications where additional payload can significantly enhance revenues.”
According to Swihart, the Paccar MX-11 engine can be spec’d between 355 and 430 horsepower with up to 1,550 pound-feet of torque, while the larger Paccar MX-13 engine has a range between 380 and 500 horsepower and up to 1,850 pound-feet of torque.
“There is overlap between the two when it comes to horsepower, so customers have flexibility to optimize their spec when they have a requirement between 380 and 430 horsepower,” said Swihart. “Torque curves vary, so depending on the application and terrain covered, it can make great sense to select an 11-liter platform. Often, drivers can’t tell the difference in power, but fleet owners can tell the difference in another metric — adding 400 more pounds of payload. That can mean additional concrete for a mixer or additional fuel or grain for a bulk hauler, maximizing the earning power of the vehicle.”
Still, it’s not a cut-and-dried solution, said Swihart. “If you’re loading up to 66,000 pounds gross, an 11-liter engine is ideal in many applications. For applications grossing between 66,000 and 80,000 pounds, the choice between 11- and 13-liter allows for a greater level of optimization.”
According to Swihart, both 11- and 13-liter engines can be spec’d with the same transmissions. “So there are no trade-offs there,” he said.
“That’s why careful evaluation of performance and life-cycle costs need to be considered,” said Swihart. “It’s penciling out the number and working closely with your dealer to determine the spec that’s best for your operation.”