GM LS7 Engine
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GM LS7 Engine
"LS engine" is the colloquial name given to the third and fourth generation small-block V8 gasoline engine used in General Motors' vehicles. The name evolved from the need to differentiate the Gen 3/Gen 4 small blocks from the original Gen 1/Gen 2 small blocks released in 1954, which are commonly referred to as "Small Block Chevrolets". The "LS" name originates from the engine RPO code of the first Gen 3 small block, the LS1, introduced in the 1997 Corvette. The term "LS engine" is used to describe any Gen 3 or Gen 4 Small Block Chevrolet, including those that do not specifically include "LS" as part of their RPO code. Sometimes referred to as an "LSx", with the lower case "x" standing in for one of the many RPO code variations of the motor, the term can cause confusion since GM now sells an aftermarket LS cylinder block named "LSX" with a capital "X". The original RPO code "LS1" is still sometimes used, if not confusingly, to describe the entire Gen 3/Gen 4 engine family. LS ...
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General Motors
The General Motors Company (GM) is an American Multinational corporation, multinational Automotive industry, automotive manufacturing company headquartered in Detroit, Michigan, United States. It is the largest automaker in the United States and was the largest in the world for 77 years before losing the top spot to Toyota in 2008. General Motors operates manufacturing plants in eight countries. Its four core automobile brands are Chevrolet, Buick, GMC (automobile), GMC, and Cadillac. It also holds interests in Chinese brands Wuling Motors and Baojun as well as DMAX (engines), DMAX via joint ventures. Additionally, GM also owns the BrightDrop delivery vehicle manufacturer, GM Defense, a namesake Defense vehicles division which produces military vehicles for the United States government and military; the vehicle safety, security, and information services provider OnStar; the auto parts company ACDelco, a GM Financial, namesake financial lending service; and majority ownership in t ...
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Small-block
The Chevrolet small-block engine is a series of gasoline-powered, V-8 automobile engines, produced by the Chevrolet division of General Motors between 1954 and 2003, using the same basic engine block. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small block family spanned from to in displacement. Engineer Ed Cole is credited with leading the design for this engine. The engine block and cylinder heads were cast at Saginaw Metal Casting Operations in Saginaw, Michigan. Generation I and Generation II LT engines are distinct from subsequent LS-based small-block engines. The Generation II engine is largely an improved version of the Generation I, having many interchangeable parts and dimensions. Later generation engines have only the rod bearings, transmission-to-block bolt pattern and bore spacing in common with the Generation I and II engines. Production of the original small-block began in late 1954 for the ...
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Hypereutectic Piston
A hypereutectic piston is an internal combustion engine piston cast using a hypereutectic aluminum alloy with silicon content greater than the eutectic point of 12 weight percent silicon. Most aluminum-silicon casting alloys are hypoeutectic (Si content lower than the eutectic point) and contain relatively fine elemental silicon crystals formed through the eutectic reaction during solidification. In addition to fine silicon crystals, hypereutectic alloys also contain large primary silicon crystals that form before the eutectic reaction, and as a result contain a much higher phase fraction of silicon. Consequently hypereutectic aluminum has a lower coefficient of thermal expansion, which allows engine designers to specify much tighter clearances. The silicon content of these alloys is typically 16-19 weight percent, and above this content the mechanical properties and castability degrade substantially. Special moulds, casting, and cooling techniques are required to obtain uniformly ...
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Distributor
A distributor is an enclosed rotating switch used in spark-ignition internal combustion engines that have mechanically timed ignition. The distributor's main function is to route high voltage current from the ignition coil to the spark plugs in the correct firing order, and for the correct amount of time. Except in magneto systems and many modern computer controlled engines that use crank angle/position sensors, the distributor also houses a mechanical or inductive breaker switch to open and close the ignition coil's primary circuit. The first reliable battery operated ignition was the Delco ignition system developed by Dayton Engineering Laboratories Co. (Delco) and introduced in the 1910 Cadillac Model 30. This ignition was developed by Charles Kettering and was considered a wonder in its day. Atwater Kent invented his Unisparker ignition system about this time in competition with the Delco system. By the end of the 20th century mechanical ignitions were disappearing from ...
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Direct-ignition Engine
A distributor is an enclosed rotating switch used in spark-ignition internal combustion engines that have mechanically timed ignition. The distributor's main function is to route high voltage current from the ignition coil to the spark plugs in the correct firing order, and for the correct amount of time. Except in magneto systems and many modern computer controlled engines that use crank angle/position sensors, the distributor also houses a mechanical or inductive breaker switch to open and close the ignition coil's primary circuit. The first reliable battery operated ignition was the Delco ignition system developed by Dayton Engineering Laboratories Co. (Delco) and introduced in the 1910 Cadillac Model 30. This ignition was developed by Charles Kettering and was considered a wonder in its day. Atwater Kent invented his Unisparker ignition system about this time in competition with the Delco system. By the end of the 20th century mechanical ignitions were disappearing from ...
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Chevrolet SSR
The Chevrolet SSR (Super Sport Roadster) is a retro-styled retractable hardtop convertible pickup truck manufactured by Chevrolet between 2003 and 2006. The 2003 and 2004 model years used General Motors' 5.3  L 300  hp '' Vortec 5300'' V8. Performance was 7.7 seconds for with a 15.9 second quarter mile run at 86.4 mph. The 2005 SSR used the '' LS2'' V8 also found in the C6 Corvette, Trailblazer SS, and Pontiac GTO, and also offered a manual transmission option, the six-speed Tremec, for the first time. For the 2005 model year, the LS2 engine featured minor modifications that boosted its output to 390 hp (395-400 for 2006), respectively. Performance improved dramatically with the LS2; the 6-speed manual version had an advertised 0-60 mph (97 km/h) time of 5.29 seconds. In addition, GM badges were added to the vehicle. Design The SSR's styled design was inspired by Chevrolet's late-1940s Advance Design trucks, in particular the 1947–1955 picku ...
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Chevrolet TrailBlazer
The Chevrolet Trailblazer is an automobile nameplate used by General Motors for its Chevrolet brand since 1999 for several SUV models: * TrailBlazer, a name of appearance package for the Chevrolet S-10 Blazer used between 1999 and 2002 * Chevrolet Trailblazer, a mid-size SUV produced since 2001 as the successor to the S-10 Blazer * Chevrolet Trailblazer, a subcompact crossover produced since 2020 File:99-02 Chevrolet Blazer TrailBlazer.jpg, 1999–2002 Chevrolet S-10 Blazer with TrailBlazer appearance package File:Chevrolet Trailblazer LTZ 2.8 TD 4x4 2019.jpg, 2019 Chevrolet Trailblazer (SUV) File:2021 Chevrolet TrailBlazer RS AWD, front 7.11.20.jpg, 2021 Chevrolet Trailblazer (crossover) See also * Chevrolet Blazer {{Chevrolet vehicles Trailblazer A trailblazer is a person who is paving the way in their particular field for future generations. Trailblazer may refer to: Sports * Derby Trailblazers, a British semi-professional basketball team * North Carolina Tra ...
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Sequential Multi-port Fuel Injection
Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All compression-ignition engines (e.g. diesel engines), and many spark-ignition engines (i.e. petrol engines, such as Otto or Wankel), use fuel injection of one kind or another. Mass-produced diesel engines for passenger cars (such as the Mercedes-Benz OM 138) became available in the late 1930s and early 1940s, being the first fuel-injected engines for passenger car use. In passenger car petrol engines, fuel injection was introduced in the early 1950s and gradually gained prevalence until it had largely replaced carburettors by the early 1990s. The primary difference between carburetion and fuel injection is that fuel injection atomizes the fuel through a small nozzle under high pressure, while a carburettor relies on suction created by intake air ...
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Cast Iron
Cast iron is a class of iron–carbon alloys with a carbon content more than 2%. Its usefulness derives from its relatively low melting temperature. The alloy constituents affect its color when fractured: white cast iron has carbide impurities which allow cracks to pass straight through, grey cast iron has graphite flakes which deflect a passing crack and initiate countless new cracks as the material breaks, and ductile cast iron has spherical graphite "nodules" which stop the crack from further progressing. Carbon (C), ranging from 1.8 to 4 wt%, and silicon (Si), 1–3 wt%, are the main alloying elements of cast iron. Iron alloys with lower carbon content are known as steel. Cast iron tends to be brittle, except for malleable cast irons. With its relatively low melting point, good fluidity, castability, excellent machinability, resistance to deformation and wear resistance, cast irons have become an engineering material with a wide range of applications and are ...
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General Motors Small-block Engine
"LS engine" is the colloquial name given to the third and fourth generation small-block V8 gasoline engine used in General Motors' vehicles. The name evolved from the need to differentiate the Gen 3/Gen 4 small blocks from the original Gen 1/Gen 2 small blocks released in 1954, which are commonly referred to as "Small Block Chevrolets". The "LS" name originates from the engine RPO code of the first Gen 3 small block, the LS1, introduced in the 1997 Corvette. The term "LS engine" is used to describe any Gen 3 or Gen 4 Small Block Chevrolet, including those that do not specifically include "LS" as part of their RPO code. Sometimes referred to as an "LSx", with the lower case "x" standing in for one of the many RPO code variations of the motor, the term can cause confusion since GM now sells an aftermarket LS cylinder block named "LSX" with a capital "X". The original RPO code "LS1" is still sometimes used, if not confusingly, to describe the entire Gen 3/Gen 4 engine family. LS ...
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Chevrolet Small-block Engine
Chevrolet small-block engine refers to one of a number of gasoline-powered vehicle engines manufactured by the General Motors company. These include: * The III, IV, V generation of LS-based GM engines. * The I, II generation of non-LS Chevrolet small-block engines. * Or the Chevrolet Gemini small-block engine The Chevrolet Gemini small-block engine is a dual-overhead cam (DOHC) V8 engine designed by General Motors. While technically a small-block engine due to its bore spacing of 4.4 inches,, General Motors engineers don't consider it to be a part o ...
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Chevrolet Corvette C5
The Chevrolet Corvette (C5) is the fifth generation of the Chevrolet Corvette sports car, produced by the Chevrolet division of General Motors for the 1997 through 2004 model years. Production variants include the high performance Z06. Racing variants include the C5-R, a 24 Hours of Daytona and 24 Hours of Le Mans GTS/GT1 winner. The C5 Corvette was the first GM vehicle to feature the third generation small block "LS" engines. Pop-up headlights were featured on a Corvette for the final time during this generation. Overview The C5 was unveiled on January 6, 1997 at the North American International Auto Show in Detroit. The fifth generation was originally intended to debut in 1993 to celebrate the Corvette's 40th anniversary, but it was delayed by financial troubles and changes in staff within GM. A major change from its predecessor the C4, the C5 had a hydroformed box frame, a design that offered an improved structural platform, especially for a convertible bodystyle. To i ...
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