just curious is anyone here has the formula to figure out the cfm output of various turbos.

thanks

 

If the turbo compressor maps show "lbs/min" you can divide that number by 0.069 to get CFM. For example:

50 lbs/min = 724.6 CFM

 

Without trying to get to complicated, it should be noted, that temperature is a variable that affects the weight of air. Using the .069 figure, will be accurate in determining cfm @115* F. This figure is not a constant, it will increase as air temp goes down, and visa versa. For instance, @80* F, the figure would be .0735. The weight of air is also affected by moisture content, but that is a separate issue.