Quote:
Originally Posted by JiM P 2001
my boost gauge reads -20psi at idle... when I pop out my IAT sensor out from the cold side FMIC pipe, it blows air in my face at idle.
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Interesting, considering negative psi isn't an actual unit of measurement.
I'd hope it would read -20 inHg.
When the compressor blades move more air volume than the engine can ingest, it stacks up, changes density and becomes pressurized. Until that point, it's just fast moving air, much like a tabletop fan on your desk would create.