With a couple recent posts referencing this I will list what I *think* I know about the "B" carbs though I am still learning.
I have written an approximate CFM estimator so I have guessed the CFM's at 1.5" Hg (the 4v standard). Comments, corrections, additions more than welcome I am trying to slowly get the history right.
*Guessed CFM at 1.5" Hg
*Guessed CFM at 3.0" Hg
*Venturi
*Throttle
*Jetting
Smallest - application is "optional" 235 truck and 230 car, I am guessing either economy special or taxi?
113cfm at 1.5"
158cfm at 3"
1-1/16 vent
1-1/2 throt
Jet #42 to #44
Next - listed as the "216" carb in recent post
137cfm
191cfm
1-7/32 vent
1-1/2 throt
Jet #51 to #52
Next - carb on most of my 194, 230, 250 Chevy II's, same size used on the 235 per panic below and also per tocmp 32-62chevy
153cfm at 1.5"
214cfm at 3"
1-11/32 vent
1-9/16 throt
Jet #57 to #58
Next - I thought there was a 1-13/32 venturi in the May 55 Hot Rod article but actually I think it is the one cited below at 1-15/32:
Next - cited on this forum as the 54-63 261 carb, also I think this is the one in the May 55 Hot Rod buildup
182cfm
254cfm
1-15/32 vent
1-11/16 throt
Jet #64 to #65
Next - the carb I find on early 292's, I think it was also used on the "HiPerf" 230/155hp in 64.
196cfm
273cfm
1-9/16 vent
1-3/4 throt
Jet #70 to #72
Some of the jetting info came from:
http://www.newagemetal.com/pages/Chevrolet/32-62Chevy.pdfIt is consistent with the jets I've found in the B, BC, BV carbs.
As I said all the cfm's are my guesses/calculations, the calculator thing is typically accurate within 6% on carbs from the Rochester "B" to the Holley Dominator. Best I can do, if anyone has some cited CFM's for these or knows more about the applications that would be welcome too.
