Why CFM ratings of compressors is BS

Mooseman

Original poster
Moderator
Dec 4, 2011
25,262
Ottawa, ON
I'm not surprised, especially for the oilless direct-drive compressors, which are basically giant versions of small 12V tire inflators. My 5hp, 20 gallon direct-drive compressor has a rating of 5cfm at 90psi and it's always had problems keeping up.

 

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