| T444E | |
| Manufacturer: | Navistar International |
| Aka: | Ford 7.3L Power Stroke |
| Production: | 1994–2003 |
| Predecessor: | International Harvester IDI |
| Successor: | Navistar VT365 Ford 6.0L Power Stroke |
| Configuration: | 90° V8 |
| Displacement: | 4441NaN1 |
| Bore: | 4.111NaN1 |
| Stroke: | 4.181NaN1 |
| Block: | Cast iron |
| Head: | Cast iron |
| Valvetrain: | OHV, two valves per cylinder |
| Compression: | 17.5:1 |
| Turbocharger: | Wastegate |
| Fuelsystem: | Direct injection and hydraulic electronic unit injection |
| Fueltype: | Diesel |
| Coolingsystem: | Water-cooled |
| Power: | 175- |
| Torque: | 425- |
| Weight: | 920lb |
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. As a result of its inability to meet California noise regulations, the T444E was discontinued midway through the 2003 model year, replaced by the all-new 6.0L VT365. In total, nearly 2 million 7.3L Power Stroke V8s were manufactured for Ford at Navistar's Indianapolis, Indiana, plant before switching to the 6.0L.
The T444E used a NaN1NaN1 bore and stroke. Power output was 2100NaN0 at 3000 rpm and 4250NaN0 at 1600 rpm for 1994-1997. Power was increased in 1998 to 2350NaN0 at 2600 rpm and 5000NaN0 of torque at 1600 rpm. In 2000, power was once again upped to 2500NaN0 at 2700 rpm with automatic transmission and 2750NaN0 with manual transmission, and 5250NaN0 of torque at 1600 rpm.
Applications: