[frnkeore]

There are many different CFM rating for the Rochester 2G/GC. They range from 225 to 500 cfm. From what I've found, the 2 basic sizes (1 1/4 & 1 3/8 Venturi) are usually rated at 285 & 450/500.

I believe the "94" is ~125 and the 2100 version, 150 to 155 cfm.

So, the smaller 2G is about the rate of 2 94's and the larger one, three 94's.

I have both a Merc manifold and one of the small 2G's for sale. $100 plus shipping.