two carb setup

[V8 Bob]

Originally Posted by 4ford

hello all.
.........the carbs the carb that is closest to the alt seems to have more vacuum then the one close to the fire wall. the primary one is that one closest to fire wall and has the choke hooked to it is this right? or should it be the other way? it has 400 heads and 1090 offy intake. 1941 ford 46 motor 59ab....any thoughts??..thanks

I would choke the carb closest to the alternator, as it is more centrally located on early regular dual intakes like yours, because of greater generator space back set. The later 8BA regular dual can have both carbs centrally located because of the longer overall length of these engines and more forward generator placement..
You want to run straight linkage with dual carbs, so there is no primary or secondary carb.
You have to sync the carbs to attain equal air flow and proper operation. This starts with the two air/fuel adjustments on each carb, followed by using a Uni-Sync or something similar to dial in the butterflies.