3 x 97 progressive (center primary) or simultaneous?
If progressive, have you tried changing the opening ratio (when the secondaries begin)?
My data, both rated @ 1.5" Hg (as 4 bbl.):
Stromberg 97: 117 CFM
Model B, 8 sizes (3 with 2-11/16" flange, 5 with 2-15/16" flange) ranging from 95 to 195 CFM each
Only the 216 Model B is smaller than a 97.
