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EFI: Mass Flow vs. Speed Density

The MAF sensor mounts in the inlet tract ahead of the throttle-body. Like an air filter, if it isn’t big enough it can create an inlet-tract restriction. Unlike carburetors, you can’t install too big a MAF, provided it’s properly calibrated. Granatelli offers precalibrated 81mm and 85mm late-model GM MAFs, ready to bolt on. View Related Article

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