Ram air pressure is density [lb/ft³] X V² [mph] / 4287
Chris, consider yourself chimed!
As a "carb guy" and "tuner", coupled with being a dyno engineer and data analyst, here are some practical thoughts to consider, based on my experience.
Not in any order:
Carb/engine "sensitivity" to "ram air pressure" generally increases with:
1) smaller engine displacement
2) smaller main jet diameter
3) smaller plenum/airbox volume
4) larger delta V
Some combinations create real tuning nightmares. And you always need to tune for how the conditions might change. If you gamble and guess wrong, well, bad things can happen . . . . . . although this is less likely nowadays, a sudden cold front could melt your engine.
Also:
a) Make da** sure that any part of the carb that "needs" to "see" the pressure increase has access to it. This is especially important with Webers/Su's and M'cycle carbs.
Blocked vents or air bleeds can be a real nightmare . . . . .
b) You may also need to pressurize the atmospheric vent of a mechanical fuel pump . . . . . .
c) Bigger plenum is
usually better.
d) Reduced turbulence is
always better.
e) Large differences in airflow or turbulence to cylinders is always a pain.
f) Come prepared with all the jets/parts you will need, ahead of time. Figure out what conditions might occur, including pressure increase. Plan ahead. Soldering/drilling
jets can be done, but it wouldn't be my first choice . . . . . .
And I'm sure there is more. Other guys can chime in with their thoughts.
Guys usually run carbs because they think they are "simpler". Properly set up EFI is much easier.
Just my 2 cents.
Fordboy