You can't push air into a carburetor-
That ain't how it works - it is an atomizer- just like mom's old perfume sprayers.
years back when the first centrifrugal superchargers were made available for cars - It was quickly apparant that the pressure from the blower had to be equalized in the entire carb-that is the carb had to run in a sealed box- then, the engine then thought it was simply in a higher air pressure enviroment
I ran a positive displacement blower with the carb on it's inlet which resolved the carb pressure thing.
FI setups are different matter --
On hotrods from year one - guys tried scoops n stacks and all kinds of tubes to help air flow increase thru the carbs .
Most simply did not understand the issue.
Model airplane guys get caught in the same trap
I use engines with carbs facing rearward wih no seperate air inlets or ducts etc..
aside from using a big sponge filter - (which keeps mice and loose bolts out - the filter changes nothing- If one has the time to experiment - a well shaped inlet trumpet MAY (may not depending on airflow speed) help airflow but typically the only noticable effet is that spit back will be captured in the inlet .