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The Ford Super Duty engine was a truck engine from Ford Motor Company.
The Super Duty was introduced in 1958, the same year as the FE and MEL series V8 engines, as a replacement for the Lincoln Y-block in truck applications. The Super Duty was available in displacements of 401 cu in (6.6 L), 477 cu in (7.8 L), or 534 cu in (8.8 L). These engines appeared in heavy duty trucks of the time and were large, heavy, low speed, high torque engines. They were never designed as automobile engines and were commonly found in large, industrial use vehicles including dump trucks, garbage trucks, concrete mixing trucks, and large buses. The Super Duty engine was built in Ford's Cleveland engine plant number 2.
When introduced in 1958, the 401 produced 226 hp (169 kW) at 3800 rpm and 350 lb·ft (475 N·m) of torque at 1800-2300 rpm. The 477 produced 260 hp (194 kW) at 3600 rpm and 430 lb·ft (583 N·m) of torque at 1800-2300 rpm. The 534 produced 277 hp (207 kW) at 3400 rpm and 490 lb·ft (664 N·m) of torque at 1800-2300 rpm. A marine version, commonly referred to as the "Seamaster" was also available starting in the late 1950s. The Seamaster was available with twin turbochargers, and weighed over 1,300 pounds (590 kg) installed.
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