67 390 Carb - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

67merc · 09-14-2004, 01:20

anybody know what the cfm would be on a stock 2bbl 390 from 1967?

Butchart · 11-01-2004, 10:14

Hi, I just stumbled across some Ford/Autolite 2100 2V carb information, from an old magazine Ford Buyer's Guide Dec. 1991. If you have that type of carb it states for 1967 All have cast integral aluminum vent tubes 1/8" npt fuel inlet. Venturi Diameters for 67 vary depends on you engine size. The approximate cfm ratings are as follows.
Ventui size Bore size CFM
.98 1.313 230
1.01 1.437 250
#1 1.08 1.562 287
1.14 1.437 300
1.21 1.687 345
#1 1.231 1.687 351
#1 1.233 1.687 356
1.33 1.687 410

#1...These are the only CFM ratings for the 2100 that have been found published in the Ford shop manuals. The remainder are calculated using average air velocity values for venturi and bore diameters.

CFM...(cubic feet per minute) Flows in actuality, vary depending on the engine size and volumetric efficiency of the engine.
Hope this helps you out and doesn't add to the confusion.

Butchart · 11-01-2004, 10:17

Re my above message on carb ratings, I had the columns spaced but it didn't print out that way, hope you can make them out.

67merc · 11-01-2004, 10:52

great info!!! thanks a bunch! :)