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MAFless Tuning
MAFless tuning is a method of operating the fuel injection system on a gasoline-powered motor vehicle whereby the mass airflow meter, or MAF, is removed. The MAF The MAF is a component in a vehicle's intake system through which air flows past a wire that is heated by an electric current. The airflow cools the wire, enabling the MAF to calculate the mass of airflow into the engine. The vehicle's engine management computer then uses this information to calculate the correct amount of fuel to be delivered to the cylinders by the fuel injection system. Removing the MAF When tuning a MAF-equipped vehicle to operate in MAFless mode, the MAF is removed. This requires the use of an alternative method of calculating airflow into the engine, which is also referred to as 'Speed-Density' system, as opposed to a MAF system. On vehicles so equipped, this alternative involves the use of a manifold absolute pressure, or MAP, sensor. The MAP sensor measures pressure in the engine's inlet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mass Airflow Meter
A mass (air) flow sensor (MAF) is a sensor used to determine the mass flow rate of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and the use of forced induction, which means that mass flow sensors are more appropriate than volumetric flow sensors for determining the quantity of intake air in each cylinder. There are two common types of mass airflow sensors in use on automotive engines. These are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with additional sensors and inputs, an engine's ECU can determine the mass flow rate of intake air. Both approaches are used almost exclusively on electronic fuel injection (EFI) engines. Both sensor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holden
Holden, formerly known as General Motors-Holden, was an Australian subsidiary company of General Motors. It was an Australian automobile manufacturer, importer, and exporter which sold cars under its own marque in Australia. In its last three years, it switched entirely to importing cars. It was headquartered in Port Melbourne, with major industrial operations in the states of South Australia and Victoria. The 164-year-old company ceased trading at the end of 2020. Holden's primary products were its own models developed in-house, such as the Holden Commodore, Holden Caprice, and the Holden Ute. However, Holden had also offered badge-engineered models under sharing arrangements with Chevrolet, Isuzu, Nissan, Opel, Suzuki, Toyota, and Vauxhall Motors. The vehicle lineup had included models from GM Korea, GM Thailand, GM North America. Holden had also distributed GM's German Opel marque in Australia in 2012 and 2013. Holden was founded in 1856 as a saddlery manufacturer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GM LS 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holden Commodore
The Holden Commodore is a full-size car that was sold by Holden from 1978 to 2020. It was manufactured from 1978 to 2017 in Australia and from 1979 to 1990 in New Zealand, with production of the locally manufactured versions in Australia ending on 20 October 2017. Between 2018 and 2020, a rebadged Opel Insignia, built in Germany, was sold in Australia as the Holden Commodore (ZB). All sales of new Commodores ended in 2020, coinciding with the discontinuation of the Holden marque and nameplate entirely. From 1978, the Commodore replaced the long-serving Holden Kingswood and Holden Premier: mid-sized executive cars developed in Australia. Initially, the Commodore was based on the Opel Commodore (C), a smaller, contemporary rear wheel drive (RWD) platform designed by General Motors' German subsidiary. This was redesigned by Holden, to suit the demands of the Australian market, road conditions and manufacturing. Subsequent series of Holden Commodore became larger, and were also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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