Throttle body compared to multi-port injector, what gets better gas mileage?

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same, 2 large injectors compared 6 small injectors, metering more precise sequential multi-port fuel injection multi-port fuel injection , tbi electronic carburetor , less precise others. big difference tbi injects fuel above throttle plates , distributes air/fuel mix cylinders, port fuel injection @ of intake valve in intake port of manifold. multi or sequential injection meters air adds appropriate amount of fuel obtain predetermined air fuel ratio (14.7:1 best catalyst performance , control of 3 major pollutants) tbi uses load,rpm , temperature calculate a/f ratio (speed density).

97 jimmy 4.3l , pontiac 3.1l . size alone 3.1l should use less larger engine. big factors on fuel economy valve timing, compression ratio, volumetric efficiency , energy efficiency. driving habits, weight of vehicle (load), areodynamics, friction , drag effect fuel economy.

just wondering own 1 of each, throttle body 1992 pontiac firebird 3.1 v6. multi-port 1997 gmc jimmy v6.
all!


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