.100''                   .200''                    .300''                     .400''                    .500''                  .600''
intake/                  intake/                  intake/                    intake/                   intake/                intake/
exhaust                exhaust                 exhaust                   exhaust                 exhaust               
exhaust


65 / 47               119 / 88                178 / 115                 216 / 124               248 / 126             270 / 126


I/E ratio                I/E ratio                I/E ratio                 I/E ratio                 I/E ratio               I/E
ratio



72%                     75%                     64%                      57%                      50%                    46%
D0VE-C As cast flow figures
Figures in CFM @ 28'' water
Not much to say here , abysmal is close though
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pg-2
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Mercury is 13.6 times heavier than water
13.6 x 1.5" is approximately  20" water
.