Chevrolet small- block engine - Wikipedia. Chevrolet small- block engine. Overview. Manufacturer. General Motors. Also called. Chevrolet Turbo- Fire. Mighty Mouse. Production. Combustion chamber. Displacement. 26. L) (1. 97. 5- 1. 97. W)2. 65 cu in (4. L) (1. 95. 5- 1. 95. W)2. 67 cu in (4. L) (1. 97. 9- 1. 98. W)2. 83 cu in (4. L) (1. 95. 7- 1. 96. W)3. 02 cu in (4. L) (1. 96. 7- 1. 96. W)3. 05 cu in (5. L) (1. 97. 6- 2. 00. W)3. 07 cu in (5. L) (1. 96. 8- 1. 97. W)3. 27 cu in (5. L) (1. 96. 2- 1. 96. W)3. 50 cu in (5. L) (1. 96. 7- 2. 00. W)4. 00 cu in (6. L) (1. 97. 0- 1. 98. W)Cylinder bore. 3. Piston stroke. 3. Valvetrain. OHV. DOHC (LT5)Chronology. Predecessor. Chevrolet Series DSuccessor. Generation II GM small- block Gen III- V GM small- block engine. The Chevrolet small- block engine is a series of automobile V8 engines built by the Chevrolet Division of General Motors using the same basic small (for a US V8 of the time) engine block. Even though the first big- block engines were smaller in displacement than the largest small block engine, the small blocks were almost all under 4. L) with most of the big block engines being above that. The small blocks' small physical size also set them apart from their massive physical size cousins, the big blocks. ![]() ![]()
![]() High output alternators and parts, starters for auto, truck, and marine. Retroactively referred to as the "Generation I" small- block, it is distinct from subsequent "Generation II" LT and "Generation III/IV" LS, and "Generation V" (LT/Eco. Tec. 3) engines. Engineer Ed Cole, who would later become GM President, is credited with leading the design for this engine. Production of the original small- block began in the fall of 1. L), growing incrementally over time to 4. Several intermediate displacements appeared over the years, such as the 2. L) that was available with mechanical fuel injection, the 3. L), as well as the numerous 3. L) versions. Introduced as a performance engine in 1. Chevrolet product line. Although all of Chevrolet's siblings of the period (Buick, Cadillac, Oldsmobile, Pontiac and Holden) designed their own V8s, it was the Chevrolet 3. GM corporate standard. Over the years, every American General Motors division except Saturn used it and its descendants in their vehicles.[1]Finally superseded by GM's Generation II "LT" and Generation III "LS" V8s in the 1. GM subsidiary in Mexico as a crate engine for replacement and hot rodding purposes. In all, over 1. 00,0. November 2. 9, 2. In many respects, the later Generation II and Generation III engines still in production today for various vehicles still trace some of their design lineage to the "small- block" design concept first laid down by Ed Cole and his team. The small- block family line was honored as one of the 1. Best Engines of the 2. Century by automotive magazine Ward's Auto. World.[1]In February 2. Wisconsin businessman reported that his 1. Chevrolet C1. 50. V8 engine. (Source: The Flint Journal, February 1. Overview[edit]The first generation of Chevrolet small- blocks began with the 1. Chevrolet 2. 65 cu in V8 offered in the Corvette and Bel Air. Soon after being introduced, it quickly gained popularity among stock car racers, becoming known as the "Mighty Mouse" motor, after the popular cartoon character of the time, with the simpler "Mouse" becoming much more common as time went on.[2]By 1. Fitted with the optional Rochestermechanical fuel injection (FI), it was one of the first production engines to make 1 hp (0. W) per 1 cu in (0. L). The 2. 83 would later be extended to other Chevrolet models, replacing the old style 2. V8s. A high- performance 3. W) and increasing horsepower per cubic inch to 1. W). It was, however, the 3. Chevrolet small- block. Installed in everything from station wagons to sports cars, in commercial vehicles, and even in boats and (in highly modified form) airplanes, it is by far the most widely used small- block of all- time. Though not offered in GM vehicles since 2. General Motors' Toluca, Mexico plant under the company's "Mr. Goodwrench" brand, and is also manufactured as an industrial and marine engine by GM Powertrain under the Vortec name. From 1. 95. 5 to 1. Turbo- Fire" V8. 3. All Chevrolet V8s, from the big- blocks to today's LS7 and LS9, evolved from the 2. Of the three engines in this family, two of them, the 2. The first of this family was the 2. The 2. 65 had a 3. The stroke of the 2. The 2. 83, famous for being one of the first engines to make one hp per cubic inch, is also famous for being the evolutionary stepping stone that would later give rise to small blocks and to the "W" blocks, ultimately culminating in the Chevrolet big- blocks. The last of this family was the 3. L), which was a stroked 2. The 2. 65 cu in "Turbo- Fire" V8 was the first Chevrolet small- block, although the first Chevrolet V8 was produced from 1. Designed by Ed Cole's group at Chevrolet to provide a more powerful engine for the 1. Corvette than the model's original "stovebolt" in- line six, the 1. W) 2- barrel debut version went from drawings to production in just 1. Cole's design borrowed the valve train design scheduled to be used at the time in the Pontiac V8. Internal GM rules at that time were that once an automotive division had introduced a technological innovation no other GM division could use it for a period of two years. The stud mounted independent ball rocker arm design patented by Pontiac engineer Clayton Leach was scheduled for introduction in the Pontiac 1. V8. GM forced the Pontiac division to share its valve train design in Chevrolet's new 2. V8 in 1. 95. 5, so that in the end both engines were introduced the same year with the same valve train design.[3]A pushrod engine with hydraulic lifters, the small- block was available with an optional four- barrel Rochester carburetor, increasing engine output to 1. W), or 1. 95 hp (1. W) in the Corvette. The short- stroke (3. Also available in the Bel Air sedan, the basic passenger car version produced 1. Upgraded to a four- barrel Rochester, dual exhaust "Power Pack" version, the engine was conservatively rated at 1. Super Power Pack" it was boosted up to the power level of the Corvette.[4]A shortcoming of the 1. In spite of its novel green sand foundry construction, the '5. The 1. 95. 6 Corvette introduced three versions of this engine – 2. W) with a single 4- barrel carburetor, 2. W) with twin 4- barrels, and 2. W) with two four- barrel carburetors and a high- lift camshaft.[4]The 2. V8 was bored out to 3. The first 2. 83 motors used the stock 2. However, the overbore to these blocks resulted in thin cylinder walls. Future 2. 83 blocks were recast to accept the 3. Five different versions between 1. W) and 2. 83hp were available, depending on whether a single carb, twin carbs, or fuel injection was used. Fuel injection yielded the most power topping out at 3. W) in 1. 96. 1. Horse power was up a bit each year for 1. The 1. 95. 7 Ramjet mechanical fuel injection version produced an even one hp per one cu in (6. W)/1 L (6. 1 cu in)), an impressive feat at the time. This was the third U. S.- built production V8 to produce one horsepower per cubic inch. Besides being available in the Chevrolet line, it was optional in Checker Taxis beginning in 1. A version of it that was built by GM Canada was also available in Studebakers produced in Canada for 1. A 3. 07 cu in version was produced from 1. Engine bore was 3. All 3. 07s had large 2. Pistons used with the 3. This engine was also used by Holden in Australia and by General Motors' South African arm.[6]4. Originally intended as the performance block, this engine family through the 3. Corvettes to vans. All engines in this family share the same block dimensions and sometimes even the same casting number; the latter meaning engines were of the same block, but with different strokes (e. This engine family was updated in 1. The first engine in this family was the small journal 3. The medium journal 3. Generation II" LT1/4 3. In 1. 96. 6, General Motors designed a special 3. L) engine for the production Z/2. Camaro in order for it to meet the Sports Car Club of America (SCCA) Trans- Am Series road racing rules limiting engine displacement to 3. L) from 1. 96. 7 to 1. It was the product of placing the 2. The 1. 96. 7 3. 02 used the same nodular cast- iron crankshaft as the 2. This block is one of three displacements, 3. The large- journal connecting rods were thicker (heavier) and used 3/8 in diameter cap- bolts to replace the small- journal's 1. When the journal size increased to the standard large- journal size, the crankshaft for the 3.
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