Lincoln Y-block V8 engine – Wikipedia

Motor vehicle engine

The Lincoln Y-block V8 engine was Ford’s earliest OHV V8 engine, introduced by Lincoln in the 1952 model year.[2] Like the later and better-known but even more short-lived Ford Y-block engine, its block’s deep skirts gave the block the appearance of the letter Y from the front.[3]

The Y-block’s development was in response to the sales success of the competing Oldsmobile “Rocket” and Cadillac OHV V8 engines, introduced in the 1949 model year, the Buick “Nailhead” engine introduced in the 1953 model year, and the OHV V8 Chrysler Hemi engine in 1951. Also, Ford needed larger and more powerful truck engines. The basic engine design was produced through 1963.[4] It was replaced by the newer MEL engine for car applications in 1958,[2] and was replaced in heavy-duty truck applications by the FT (330/361/391) engines starting in 1964.

A 279 cu in (4.6 L) version of the Lincoln Y-block was produced for heavy-duty truck applications for the 1952 through 1955 model years.[4] The engine had a bore of 3.5625 in (90.5 mm) and a stroke of 3.5 in (88.9 mm).[4][5][6]

The 302 cu in (4.9 L) version of the Lincoln Y-block was used for heavy-duty truck applications from the 1956 through the 1963 model year.[4] The engine had a bore of 3.625 in (92.1 mm) and a stroke of 3.65625 in (92.9 mm).[4][5][6] Power output was 196 hp (146 kW).[7] The engine was optional equipment on the Ford T-700 Series and standard equipment on the Ford F-750, C-750, and B-750 Series heavy-duty trucks.[7]

The first-generation Y-block was the 317 cu in (5.2 L), which replaced the undersquare 337 cu in (5.5 L) flathead V8 on all Lincolns in the 1952 model year and was produced through 1954.[2] The 317 was oversquare, as was rapidly becoming the fashion, with a bore of 3.8125 in (96.8 mm) and a stroke of 3.5 in (88.9 mm).[3][4][5][6] Power output was 160 hp (119 kW); higher compression, larger intake valves, a Holley four-barrel carburetor, improved intake and exhaust, and a more aggressive camshaft the next year increased it to 205 hp (153 kW).[3] The engine was unchanged in 1954 except for the vacuum advance mechanism.[3] These engines used hydraulic valve lifters while Ford truck engines used solid. The stock Lincoln 317 powered the “Mexican Road Race Lincolns”. The 317 was replaced by the 341 for automobile applications in the 1955 model year.[2] Like the 279, the 317 was also used in heavy-duty truck applications for the 1952-55 model years .[4]

Lincolns powered by the 317 won the top four spots in the Stock Car category of the Pan American Road Race in both 1952 and 1953.[2] In 1954 Lincolns took first and second place.[2]

The 332 cu in (5.4 L) version of the Lincoln Y-block was used for heavy-duty truck applications from the 1956 through the 1963 model year.[4] The engine had a bore of 3.8125 in (96.8 mm) and a stroke of 3.65625 in (92.9 mm)[4][5][6] and produced 212 hp (158 kW).[7] The engine was standard equipment on the Ford F-800, F-900, T-750, T-800, C-800, and C-900 Series heavy-duty trucks.[7]

The 317 cu in (5.2 L) automobile engine was bored out in 1955 to 3.94 in (100.1 mm), displacing 341 cu in (5.6 L).[3][4][5][6] Power was up to 225 hp (168 kW) and torque 450 N⋅m (332 lb⋅ft).[3] in its sole year of production.[2]

In the 1956 model year the 341’s bore was increased to 4 in (101.6 mm) and stroke to 3.65625 in (92.9 mm) to create a 368 cu in (6.0 L) engine[3][4][5][6] that produced 285 hp (213 kW) and 545 N⋅m (402 lb⋅ft).[3] In 1957 horsepower increased to 300 hp (224 kW) with 563 N⋅m (415 lb⋅ft) of torque but the Lincoln still lagged in horsepower and torque behind the Chrysler Hemi 392 used on the Imperial, Chrysler New Yorker, and 300C, and in horsepower behind the 3-2bbl version of the Cadillac 365 used on the Eldorado.[3] The 368 was standard equipment on all Lincolns in the 1956 and 1957 model years,[2] and standard on the Mercury Turnpike Cruiser and Colony Park and optional on the Mercury Montclair, Monterey, Voyager, and Commuter[2] in 1957, its final year.[clarification needed]

Lincoln Y-block engine family[edit]

Displacement Bore Stroke Power Torque Years Usage
279 3+916 in (90.5 mm) 3+12 in (88.9 mm) 152 hp (113 kW) 246 lb⋅ft (334 N⋅m) 1952-1955 Ford heavy duty trucks
302 3+58 in (92.1 mm) 3+2132 in (92.9 mm) 196 hp (146 kW) 1956-1963 Ford heavy duty trucks
317 3+1316 in (96.8 mm) 3+12 in (88.9 mm) 160–205 hp (119–153 kW) 284–305 lb⋅ft (385–414 N⋅m) 1952-1955 Lincoln and Ford HD trucks
332 3+1316 in (96.8 mm) 3+2132 in (92.9 mm) 212 hp (158 kW) 1956-1963 Ford heavy duty trucks
341 3+1516 in (100.0 mm) 3+12 in (88.9 mm) 225 hp (168 kW) 332 lb⋅ft (450 N⋅m) 1955 Lincoln
368 4 in (101.6 mm) 3+2132 in (92.9 mm) 285–300 hp (213–224 kW) 402–415 lb⋅ft (545–563 N⋅m) 1956-1957 Lincoln and Mercury

Bore spacing[edit]

Although classified by some as a medium-block V8 (due to its relatively modest maximum displacement of 368 cu in (6.0 L)[3][5]), the Lincoln Y-block is a big-block engine in size.[1] While bore spacing is relatively modest at 4+58 in (117.5 mm),[5][8] the deck height of 10+1516 in (277.8 mm)[5] is greater than any gasoline powered V8 with the exception of the 11+14 in (285.8 mm) Ford Super Duty engine, which gradually replaced the Lincoln Y-block for use on heavy duty trucks.[5]

A useful comparison is the Oldsmobile V8 engine, which came in both small-block and big-block versions from 1965 to 1976.[3] Both blocks have a bore spacing of 4+58 in (117.5 mm),[3][5] almost exactly the same as the Lincoln Y-block, but differ in deck height, with the small-block’s being 9+2164 in (236.9 mm)[3][5] and the big-block’s 10+58 in (269.9 mm).[3][5] By this measure the Lincoln Y-block has a larger engine block than the Oldsmobile “big-block.” In comparison, the Ford FE engine has the same 4+58 in (117.5 mm) bore spacing[5][9] but a deck height of 10+1164 in (258.4 mm).[5][9]

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