Navistar VT Engine - 6.4

6.4

The 6.4 L Power Stroke, used in 2008 model year Ford Super Duty trucks, is a V8 turbodiesel engine. The engine has a sequential twin-turbo intercooled forced induction system. The engine also uses a high pressure common rail fuel injection system. It produces 350 hp (260 kW) at 3000 rpm and 650 ft·lbf (880 N·m) of torque at 2000 rpm.

This engine is also used in International trucks and buses under the name MaxxForce 7. However, the EPA2007 MaxxForce 7 does not have the sequential turbocharger system; rather, it uses a single stage variable vane turbocharger. Displacement and injector systems are the same as the Ford branded Power Stroke. In MaxxForce 7 guise, the engine produces between 200 and 230 hp and 580–620 ft·lbf of torque.

For the 2010 model year, Navistar has upgraded the MaxxForce 7 with dual sequential turbochargers, giving it a new power range (220-300 hp @ 2600 rpm and 520–660 ft·lbf of torque @ 1600–2200 rpm). Also for the 2010 version, an updated single cooler EGR system has been implemented to replace the dual cooler design of the 2007 version. The cylinder block has also been updated using CGI material to increase strength and reduce weight.