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Old 03-08-2014, 11:52 PM   #7
pbp1
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Default Re: EFI, Alpha-N vs Speed Density fueling Strategies

Tony, the A/F ratio is not being adjusted, the fuel is being adjusted to keep the A/F consistent in spite of air changes. The MAP sensor is constantly registering changes because it is reading the "atmosphere" inside the manifold and that is what the engine sees. It's all about maintaining a consistent, or at least a desired Air/Fuel ratio.
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