Motorcraft Carb Question

[car62]

i saw awhile back there was a chart posted,i have tried the search function and came up empty handed...there was a CFM chart for these carbs..i have about 15 carbs and id like to write down what the CFM is on them,they range from 1.08 to 1.33

[car62]

Actually i just found the chart.

0.98 = 190 CFM
1.01 = 240 CFM
1.02 = 245 CFM
1.08 = 287 CFM
1.14 = 300 CFM
1.21 = 351 CFM
1.23 = 356 CFM
1.33 = 424 CFM

[dougskewl]

Cool that you found it but good info for the rest of us

[2old2nobetter]

WE had real good luck with the 1.21. Drill the jets to what you need take chock off.And hammer down!

[return to dirt]

those numbers are pretty close. i flow tested a 1.33 a few years ago and it flowed 422 cfm with the choke plate still in the carb.

olin

[Dirtman29]

Ive used the "121" carb for 5 yrs. now, works better than the holley I used to use. Still has stock 53 jets in it.