In the for what its worth category, CFM ratings were published for some of the Monojets:

1 7/16 throttle 1 7/32 venturi - 160 CFM (113)
1 11/16 throttle 1 5/16 venturi - 210 CFM (148)
1 11/16 throttle 1 1/2 venturi - 250 CFM (177)

All ratings at 3.0 inches Hg. I calculated a factored 1.5 rating which is listed in ().

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor you will ever buy, is the incorrect one you attempt to modify!!!