Motorcraft carburetors were used in engines manufactured by Ford from to the late s. Prior to , Motorcraft carburetors were manufactured under the Autolite brand name. An automobile carburetor is responsible for regulating the mixture of air and gasoline used to create a combustible mixture in an engine. Motorcraft carburetors were manufactured in three basic types, which were single barrel, two barrel and four barrel. Identification tags were not stamped onto Motorcraft or Autolite carburetors prior to model year Ford engines.
The small-block Ford V-8 was a quantum leap in lightweight cast-iron engine technology at the time. For a comprehensive guide on this entire subject you can visit this link:.
Motorcraft Carburetor Identification
The small-block Ford was produced in two foundries and engine plants during its long production life: Cleveland, Ohio, and Windsor, Ontario. The W was produced exclusively at Windsor. The and were produced at Cleveland only. The and were introduced in the Ford Fairlane and Mercury Meteor. During the following years, the and proved to be fiercely reliable engines that were both peppy and economical to operate.
Although these engines are virtually identical externally, there are differences that make them identifiable. The had a true harmonic dampener. From to , small-block Fords were identified by engine color: color-coded valvecovers and air cleaners over a black block and heads. All Ford engines were primarily black with valvecovers and air cleaner in specific colors for identification purposes. Beginning in , all engines were painted Ford Corporate Blue and remained that way until the early s when the color changed to gray, then ultimately bare iron and aluminum.
Not all engines were equipped this way. Others had a valvecover oil filler neck. The horse ci V-8 was introduced in It was a very low-displacement small-block that has very little interchangeability with the , , , and W V-8s. It is fitted with the 2. When these engines had the timing cover oil filler tube, they were not fitted with a PCV valve. Instead, they had the draft tube extended from the rear of the intake manifold or off the passenger-side valvecover.
Three or more variations were produced. These cylinder heads are non-players unless you are performing a restoration and want original castings. The ci small-block was short- lived with production ending in Like the , the was fitted with the cast crank with 2.
Valvestem size also stood at 0. The was available only with Autolite 2-barrel carburetion with automatic choke. Both the and were mild-mannered mills at 8.
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Carroll Shelby launched two-seat Cobra production with the ci small-block topped with a Cobra high-rise manifold and Holley carburetion. Ford increased bore size to 4. You have to begin with a or block. The block is a thicker casting designed for larger 4. The same can be said for the block, with its extended cylinder skirts extended by. In fact, the block first showed up in the model year stuffed full of internals: the 1M crank with 2.
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There are many misconceptions about the It is time to set the record straight. All cylinder heads, including High Performance, have the same port, valve, and chamber dimensions. Intake valves are 1. Exhaust valves are 1. This is a V V-8 in gold over black, premium fuel, with California emissions closed-crankcase ventilation in a Mustang. All small-blocks originally delivered to a California sales district had closed-crankcase ventilation.
The High Performance V-8 yielded hp at 6, rpm. It was unavailable with automatic transmission until in the United States. Most were fitted with the castiron Ford Top Loader 4-speed transmission. The valvespring pockets for stability along with screw-in rocker arm studs engineered to withstand high RPM.
You get the same result for less money. In , Ford added a third to the mix. It had 4-barrel carburetion and the same compression ratio as the 2-barrel available in Mustangs only D engine code.
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- Ford Motorcraft 2 barrel carburetor Parts Page.
- REBUILT MOTORCRAFT 2150 2 BARREL CARBURETOR 1.08 302 Ci MANUAL, 1976 FORD TRUCK.
It has yet to be proved whether this was added at the factory or a dealer parts counter. Beginning in the model year, all Ford engines were clad in Ford Corporate Blue, which was a move to identify them as Ford engines. This is a produced prior to May with traditional small-block Ford valvecovers.
REBUILT MOTORCRAFT 2150 2 BARREL CARBURETOR 1.08 302 Ci MANUAL, 1976 FORD TRUCK
California emission standards manifested themselves two ways in closed crankcase ventilation coupled with the use of a positive crankcase ventilation PCV valve, the latter also used on most state cars. Some engines were fitted with PCV valves while others were fitted with a draft tube. Some engines were fitted with timing cover oil filler tubes, while most were located in the driver-side valvecover. Combustion chamber sizes in — ranged from Chamber size depended upon the casting. All — engines had five-bolt bellhousing blocks just like the and Important upgrades in the occurred for the model year beginning in August The most obvious was a block casting change from a five-bolt bellhous-ing pattern to a six-bolt to improve noise, vibration, and harshness.
Aside from this important change, the remained essentially the same, with the base V engine retaining Valve sizes remained the same. The V engine went from sharing dished pistons and the same compression ratio to All pistons, flat-top and dished alike, had valve reliefs.
The High Performance V-8 remained virtually unchanged aside from the six-bolt bellhousing block and a higher compression ratio. This V engine has California emis-sions closed crank-case ventilation. Shown is a V V-8 with the same basic small-block Ford air cleaner introduced in Beneath this air cleaner is a more emissions-friendly Autolite carburetor with evaporative emissions and a more aggressive choke pull-off.
Effective May 2, , V and 4V engines received important cylinder head and valvetrain changes: rail-style rocker arms, longer valve- stems, revised cylinder head castings, and pent-roof flat-top valvecovers. The pent-roof-style valvecovers were in production through the model year.
One subtle change during the model year was the short-term use of a finned timing cover through early Although the High Performance V-8 never employed rail-style rocker arms, it did use pent-roof valvecovers with a chrome finish and High Performance open-element air cleaner for Pressure from increasing displacements at Chevrolet, Pontiac, and Chrysler pushed Ford toward adding more stroke to the tried-and-proven to get ci.
The additional stroke was chal-lenging to measure at. Ford had to revise the block, extending cylinder skirts. Some — engines received blocks as early as February This was toward the end of the model year before the entered production. Although the has a longer 3. Aside from those small differences, the is virtually identical to the , including valve size and combustion chamber design. It is higher compression premium fuel because compression is the easiest means to increased power. These words appeared on all Ford valvecovers that year and continued until when they were replaced by the Ford corporate oval.
The has evolved considerably since its introduction in In , Ford also began fitting the and other engines with a stamped aluminum air cleaner to reduce vehicle weight.
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The bottom end also changed to accommodate the increase in performance.