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The firing order has been changed from that shared by all previous Modular V8s (1-3-7-2-6-5-4-8) to that of the Ford Flathead V8 (1-5-4-8-6-3-7-2). [17] Compression ratio is 11.0:1, and despite having port fuel injection (as opposed to direct injection ) the engine can still be run on 87 octane gasoline.
Initially, the 4.6 L Triton engine and the new 3-valve 5.4 L three-valve-per-cylinder Triton V8 engines, respectively mated to a 4R70E and 4R75E four-speed automatic transmission, were the only two powertrain combinations available to the retail public on the new trucks.
A 4.2-liter OHV V6, based on Ford's 3.8-liter Essex V6, replaced the 4.9-liter inline-six, while the 4.6- and 5.4-liter SOHC V8s replaced the 5.0- and 5.8-liter OHV V8s. The new V8s were marketed under the "Triton" name and mark the first use of Ford's Modular single overhead cam (SOHC) engines in the F-Series pickups.
The new engine was not marketed under the Triton name in the Navigator even though it is mechanically identical to the F-150's engine. The 4R75W 4-speed automatic transmission used from 2003 until 2004 was replaced with a new ZF-sourced 6-speed automatic transmission. The 2005 Navigator's base curb weight fell to 5,555 lb (2,520 kg) while four ...
The smallest-displacement engine of the 385 engine family, the 370 was introduced in 1977, replacing the 361 cu in (5.9 L) 360 Truck (FT) V8. Sharing its 3.59-inch stroke with the 429, the 370 was designed with a downsized 4.05-inch bore (shared with its predecessor and the 390 V8). For 1979, the engine was rebranded in metric, as 6.1 L. [2]
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