Navistar Launches ProStar+ with Maxxforce 15

North American commercial truck customers will be glad to hear that Navistar has just announced the introduction of the ProStar+ with MaxxForce 15, a unit that has been engineered specifically for International’s Class 8 heavy-duty on-highway trucks.

“With the addition of our MaxxForce 15, our lineup of MaxxForce Advanced EGR big bore engines truly differentiates us from the competition,” said Jim Hebe, Navistar’s senior vice president, North American sales operations. “The introduction of the ProStar+ with MaxxForce 15 now gives customers the ultimate combination in durability and power.”

MaxxForce 15 for the International ProStar+ is available with up to 500 horsepower and 1,850 lb.-ft. of torque and is the most powerful engine Navistar builds.

The MaxxForce 15 is built on a proven block and crankshaft combined with the fuel and air systems of the MaxxForce Advanced EGR system. “This combination delivers unprecedented hauling power and unrivaled durability with the convenience of a hassle-free 2010 emissions solution,” Navistar says.

Peak torque is achieved at 1,000 rpm and holds steady to 1,600 rpm, which reduces gear-shifting needs uphill and allows for shifting at lower speeds when accelerating. Navistar says durability is enhanced with a four-bolt connecting rod design.

“A premium cam and rolling element valvetrain system reduces friction and operational load to maintain peak efficiency across the power band. Interstage cooling between the turbos increases air density to maintain peak power as speeds increase,” the company says in a statement. “The four-bolt design assures the clamping force and rigidity required for extreme loads and terrain, for which the MaxxForce 15 is designed.”