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Fuel injection allows a precise amount of fuel to suit the amount of air flowing through the engine, making it more efficient. [ 4 ] [ 5 ] [ 6 ] Fuel injection is also used to regulate the horsepower rating of the stock cars, making the sport safer, providing for more fuel efficient vehicles, in addition to cleaning the environment for the ...
A typical ETC system consists of three major components: (i) an accelerator pedal module (ideally with two or more independent sensors), (ii) a throttle valve that can be opened and closed by an electric motor (sometimes referred to as an electric or electronic throttle body (ETB)), and (iii) a powertrain or engine control module (PCM or ECM). [4]
2016 - Holley HP EFI engine control unit (ECU) became standard equipment used on all cars in the NHRA's Pro Stock class, the world premier class for naturally aspirated drag cars. [29] 2018 - Holley HP EFI engine control unit (ECU) became standard equipment on the optional NT1 engine which is legal for use in NASCAR Truck Series racing.
For 1988, a fuel-injected 7.4L V8 was introduced as an option for the 3500 series, [12] becoming the first big-block V8 offered for the model line. For 1990, manual transmissions were discontinued and the four-speed automatic became standard equipment on nearly all body configurations; [ 4 ] for 1992, the 4L60E and 4L80E four-speed automatics ...
Work Completed: Limited slip differential fixed with new friction plates, geared down final drive to increase acceleration, speedometer re-adjusted, suspensions and whole exhaust assembly replaced, performance exhaust manifolds, air filter and throttle body installed, smaller pulleys installed to minimize power loss and increase performance ...
To meet OBD-II compliance, the Vortec engines replaced throttle-body fuel injection with sequential fuel injection, redesigned engine camshaft and cylinder heads, along with longer-life engine coolant and spark plugs. [14] The naturally-aspirated 6.5 L engine was discontinued (the turbodiesel remained offered for all C/K trucks). [14]
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