I'll admit this-- Procharger makes many superchargers all operating at 38psi maximum boost. However, depending on the size of the unit and design application the maximum CFM at 38 PSI ranges from 1525CFM to 2700CFM. Some of these units have identical dimensions. The answer to why they develop different flow rates has to do with efficiency based on impeller design and the A/R ratio. So, like I first told you there isn't a linear relationship between boost and CFM or Lbs/Min in a turbo or a Supercharger always when you compare different models of units. You really need to know more about the specific unit and what application it used for.

https://www.procharger.com/sites/def...Specs-RACE.jpg

So, there you go... You can choose to believe Procharger's chart or not. I'll trust in my extensive library of engine theory and design books...

But , hey, it was fun while it lasted!