Interim Solutions: The Throttle Body Injected LA Engines
The last variation of the LA series to be introduced before the Magnum upgrade was the 1988-92 throttle-body fuel injection, roller cam engine. The first engines to receive these modifications were the 318ci V8 and 239ci V6 engines. A Holley/Chrysler-designed, single-point, twin-injector throttle body assembly was mounted atop a new aluminum intake manifold. The valvetrain was upgraded to include hydraulic roller lifters, thus allowing for a more aggressive valve lift. The resulting engine was somewhat improved as to power and efficiency, and the 5.9L V8 engines followed suit in 1989. However, with other manufacturers already introducing the vastly superior multi-point fuel injection system, Chrysler Corporation considered a more drastic upgrade program.
So, as the TBI engines were being introduced, the new upgrade program was initiated in the Chrysler engineering department. In 1992, with emissions standards becoming ever more stringent in the United States, Chrysler Corporation released the first of the upgraded engines.
Read more about this topic: Chrysler LA Engine
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