Willys Hurricane engine

The Hurricane was based on the earlier Go-Devil flathead engine. To get more power from the engine, the induction system was changed from the Go-Devil's side-valve configuration to an inlet-over-exhaust configuration, or "F-head". This allowed the valves to be larger and the combustion chamber to be smaller, improving flow and increasing the compression ratio.[2] The compression ratio rose from 6.5:1 in the Go-Devil engine to 7.5:1 in the Hurricane engine, although a version of the Hurricane engine was made with a 6.9:1 compression ratio.[3]

The L134 Go Devil was updated with the F-head to become the F134 in 1950.[4][5] This engine produced a gross output of 75 hp (56 kW; 76 PS) at 4000 rpm and 114 lb⋅ft (155 N⋅m) of torque at 2000 rpm with a 7.5:1 compression ratio. The gross power and torque outputs fell to 72 hp (54 kW; 73 PS) and 112 lb⋅ft (152 N⋅m) respectively when the engine had a 6.9:1 compression ratio. Bore and stroke dimensions were the same as the L-head engine at ​3 ¹⁄₈" x ​4 ³⁄₈" giving 134.2 cu in (2,199 cc).[3]

The F4-134 was introduced in 1950 in the Jeep Truck.[4] Vehicles with this engine were given the model designation 4-73.[6] This engine was not placed in a CJ until the introduction of the CJ-3B in 1953, which had a distinctive high hood to accommodate the much taller engine.[2] The engine remained in production until 1971, after American Motors Corporation (AMC) purchased Kaiser Jeep.

Applications:

• 1950–1961 Willys Jeep Truck
• 1950–1961 Willys Jeep Wagon
• 1950 Willys-Overland Jeepster
• 1952–1971 Willys M38A1
• 1953 Willys 475A Lark
• 1953–1968 Willys CJ-3B
• 1955–1971 CJ-5
• 1956–1971 CJ-6
• 1965-1967 DJ-5
• 1966–1971 Jeepster Commando

The F6-161 Hurricane is an F-head version of the L6-161 Lightning flathead straight six. It was used in the Model 685 Station Wagon.[7]

BF-161 The BF-161 has a ​3 ¹⁄₈ inch bore and a ​3 ¹⁄₂ inch stroke, a one-barrel carburetor, and an output of 90 hp (67 kW; 91 PS) at 4400 rpm and 135 lb⋅ft (183 N⋅m) of torque at 2000 rpm. Its 161.1 cu in (2,640 cc) displacement features a compression ratio of 7.6:1.[8]

2600 The 2600 was essentially the same BF-161 engine made in Brazil by Willys-Overland's subsidiary, but it had two one-barrel carburetors (simultaneously opened) and had an output of 130 hp (97 kW; 132 PS) at 4400 rpm and 140 lb⋅ft (190 N⋅m) of torque at 2000 rpm. The compression ratio remained 7.6:1.[8]

3000 The 3-liter version is almost identical to the BF-161 engine with the stroke increased to 4 inches (101.6 mm) giving it a displacement of 3,016.5 cc (184.1 cu in).[8] With a 2-barrel carburetor it produced 140 hp (104 kW; 142 PS) at 4400 rpm and 161 lb⋅ft (218 N⋅m) of torque at 2000 rpm. It also had a slightly higher compression ratio of 8:1.[8] It initially used a different head with removable intake manifold. Later, after Ford acquired Willys-Overland do Brasil, they reverted the engine to its former head design with integral intake manifold, improved cooling between cylinders 5 and 6 and installed a side-mounted oil filter, instead of the front-mounted, hose connected arrangement used by Willys.

Applications:

• 1961–1962 Willys Aero
• 1963–1971 Willys Aero 2600
• 1960-1974 Willys-Overland Jeep and Rural Willys
• 1968–1971 Willys Itamaraty 3000
• 1972-1974 Ford Maverick six-cylinder version in Brazil

Super Hurricane engine in 1955 Jeep Willys Utility Wagon

The 6-226 "Super Hurricane"[9] was a L-head 6-cylinder[10][11] from Continental[11] with a bore of ​3 ⁵⁄₁₆ inches and stroke of ​4 ³⁄₈ inches, giving a displacement of 226.2 cu in (3,707 cc).[12] Horsepower rating is 105 hp (78 kW; 106 PS) at 3600 rpm or 115 hp (86 kW; 117 PS) at 3650 rpm,[12] as well as a torque rating of 190 lb⋅ft (258 N⋅m) at 1400 rpm or at 1800 rpm,[12] depending on the year of production.

Mitsubishi built a version of the Hurricane from 1954 as the JH4 (69 hp), mostly for use in their license-built version of the Jeep.[13] They later developed a 61 PS (45 kW) overhead-valve diesel version of the same, called KE31. This was also turned into a 3.3 liter six-cylinder version with the same internal dimensions, producing 85 PS (63 kW), which was named KE36. These diesel engines were used in the Jeep, but also in a number of light to medium-weight trucks and buses.[14]