Cita:
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Iniciado por ANGEL Z28
GENERAL MOTORS 5.0-, 5.7-and 7.4-liter (305-, 350- and 454-cid, respectively) V-8 engines have long been popular with trailer-towing enthusiasts and motor homers. Effective with the 1996 model year, these engines have been augmented by increased horsepower and torque. The new Vortec series, as it is called, represents a complete overhaul of the GM truck-engine family. We had an early chance to put in some drive time in a 1995 C2500 Suburban from the GM engineering department that was fitted with a production-prototype 1996 Vortec 7400 engine. How much stronger is the new engine? The numbers in the chart tell the tale.
Creating this extra horsepower and torque isn't done by just changing one component. It's a system approach in which every piece is designed around and complements the other parts to produce the desired effect. At the heart of the Vortec engine is the new multipoint sequential fuel-injection (SFI) system. Previous engines used a throttle-body injection system, in which two injectors added fuel to the inlet airstream in the same approximate location where the carburetor would have been. From there, the fuel-air mixture found its way to the cylinders via a traditional intake manifold.
The new system goes one step better, in that it uses eight separately controlled injectors that deliver the fuel directly to each cylinder just upstream of the intake valve. This provides for greater fuel control, which results in smoother idling and running, greater fuel efficiency, reduced emissions and the potential for improved fuel economy.
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mano , lee bien .
en el mismo articulo que acabas de poner, ellos mismos se refieren al motor como Vortec.
mira el contexto de la palabra "System"