All the calculations ,blower books,B&M caculator, etc,said all it needed max,was a 750,which is what she was using (750 DP)
There are variables we don't know, but just a guess:
350" @ 90% VE, 6,000 peak power = 547 CFM @ 1.5" Hg vacuum.
10 psi boost at sea level (14.7 etc.) is 1.68:1 pressure ratio.
547 × 168 = 919 CFM.
