Frank-
I have access to a flowbench, so I can probably get flow figures when the carb arrives. I spoke with the seller of the M-2, who appears to have a bit of experience with them. His recollection was the M-2 & M-3 had the same bore dia- 1 1/2".
Brown quoted me 1 9/16" for the M-3- I can't say since I don't have one to compare. Perhaps the Tyce version is a copy of the M-3- I'll see if it differs in bore dia. Supposedly, these could run V8 engines- Brown's version was supposed to work up to 500 c.i. One problem they had was icing, since they were more effective at fuel vaporization. I don't know much about the M-1, maybe the promo literature will have a model breakdown. Supposedly a small version called the "Minnow" was also made.
