Depending on which compressor gtm using with the stage 1 kit.
According to the mfg spec of each compressor:
C38-61 - 300-550hp .50kg/s converted to 66lbs/min
C38-71 - 350-590hp .52kg/s converted to 68lbs/min
C38-81 - 400-630hp .55kg/s converted to 72lbs/min
and the C38-91 is 11 percent more then C38-91.
Converting the flow rates .63 kg/s to lbs/min (like most turbo guys refer to), the c38-91 can support 83lbs/min! 800hp!!
http://www.power-enterprise.co.jp/ro...rotrex/C38.pdf