These following numbers are for Motorcraft/Autolite carbs. This number can be found on the side of the float bowl, right behind the accelerator pump rod, inside of a circle. The number on the right corresponds with the cfm rating on the left. Thanks to chas1234 for these numbers. The first numbers are the venturi size, the second is the corresponding cfm.
These numbers are for 2BBL carbs only.
These numbers are for 4BBL carbs, courtesy thrillseeker.
1.08= 480cfm
1.12= 600cfm
and a rare very rare
1.19= 670cfm.
For additional info on Motorcraft and Autolite carbs, check out this site: http://home.earthlink.net/~bubbaf250...rb/carb01.html
He has a lot of good info on the history of the carbs, performance modifications, and carb operation theory.
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Jared
The government said all my vehicle were too old to be clunkers
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