289 mpg

hallgren87idi

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so i got a 65 289 in my 74 f100 with a 3 speed manual trans on the column. checked my mpg only getting about 11mpg, but i was kind of goin 75-80 on the freeway and stop and go i wasnt exactly nice, but babied it for the most part. i still think 11 is a bit low, it smells like my carb is running rich. i swapped a 350 cfm holley 2v. you think my jets making it run rich would effect the mpg that much?
 

DeepRoots

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Jets, air bleeds, badly set idle mix, float setting, weak ignition, etc etc

My 76 F100 gets 11-12mpg if I baby it with a 390. you probably won't get too much better, but I'm sure you can get a lil better.
 

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