The Mean Green Bean's OBA thread competed, with numbers. (1 Viewer)

[PIP]

At what PSI does it deliver 6CFM?

Is the tiny intake hose a restriction? I have some time around small industrial compressors- 20 to100 CFM sized- And have never seen an intake pipe that small. Twin 20 CFM @175 PSI Quincy's run my shop air and they have 1" ID intake piping to feed that. If your theoretical CFM was 10 CFM I wonder if you increased the suction piping ID to half the area of 1" if it would help?

 

[Rusty Marlin]

I calculated the 6 CFM on the make up pressure of 120 to 150.
This is the calculation I used:
Cubic Feet of system x Delta P in atmospheres x 60/time in seconds for Delta P

https://www.hunker.com/12174007/how-to-calculate-the-cfm-of-an-air-compressor

The inlet line is 1/2" air line. .196in^2
I that used the because its what everybody is using on the Yorks. No engineering went into it, "just monkey see, monkey do".