Originally Posted by nmcgrawj
So you are limited by the volumetric efficiency of the smallest hole right?
And stem size isnt the same as how tall a hookah is right? But i guess it would be an "ok" assumption to make as long as you take both as the same. I think we should note though that if you have a short downstem that doesnt go that deep into the base, then you cant assume your "29inch" whatever is going to perform like a 29" KM or whatever that has a longer downstem.
You are not necessarily limited by the volumetric efficiency of the smallest hole; if this were true then upgrading a hose would not increase airflow, as in most cases the hose is still wider than the host port even in generic hookahs. The exact correlation cannot really be determined without aerophysics and some fluid mechanics principles applied to gases. Because the speed of the gas being pulled through the hose port will speed up at the choke.
Also the length of the stem is NOT equal to the height of the hookah.