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The Navistar T444E is a diesel V8 engine manufactured by Navistar International Corporation. In its use in Ford Motor Company trucks, vans, and school buses, it is the first of the Power Stroke family of diesel engines. The T444E was manufactured from 1994 to 2003, replacing the 7.3L IDI V8 designed by International Harvester.
The 7.3 L DI Power Stroke was in production until the first quarter of model year 2003, when it was replaced by the 6.0 L. Nearly 2 million 7.3 L DI Power Stroke engines were produced in International's Indianapolis plant. [8] The 7.3 L DI Power Stroke engine is commonly referred to as one of the best engines that International produced. [6] [7]
The sole gasoline engine was the 6.8L V10, while the 7.3L Power Stroke was the diesel option; in mid-2003, this was replaced by the 6.0L Power Stroke. For 2005, the F-450 and F-550 received further updates to the exterior than the rest of the Super Duty line, with an extended front bumper and front fenders; the F-550 received a "wide-track ...
2011–present Scorpion Diesel V8—"Power Stroke" OHV 6.7 L 32-valve DI turbo diesel (F-series only) 2020–present Godzilla V8 — Pushrod V8 7.3 L (445 cu in), gasoline, naturally aspirated, port fuel injected, variable timing, 16valve, 10.5:1 compression made for F-series Super Duty models.
It is designed for longitudinal engine applications, and is rated to handle up to 705 newton-metres (520 lbf⋅ft) of torque. General Motors used the S6 as RPO ML6. Gear ratios:
By the end of the 1970s, the use of the Super Duty engine began to decline in heavy trucks in favor of diesel-fueled engines; in medium-duty trucks, variants of the similar-displacement (but higher-efficiency) 385-series V8s became more commonly used. In 1981, Ford withdrew the Super Duty engine line.
At their launch, the F-650 and F-750 were available with the Caterpillar 3126 (replaced by the C7) 7.2L inline-six, the Cummins ISB 5.9L inline-six, and the Navistar-produced Ford-branded 7.3L Power Stroke V8 engine. The 6.0L Power Stroke replaced the aging (and no longer compliant with California noise regulations) 7.3L for the 2004 model year.
The standard gasoline engine was a 5.4 L Triton V8; a 6.8 L Triton V10 was offered as an option. At its launch, the optional diesel engine was the Navistar-produced 7.3 L Power Stroke V8; during 2003 production, a Navistar-produced 6.0 L diesel V8 was introduced, again using the Power Stroke name.