intake horns, efficiency, cfm......blah blah

[foolkiller]

this is in redirect of a couple threads discussing intake horns and the questions i'm getting.

i've used a bunch of math that i haven't used since about 1980 when i was trying to master the small block chevy. i'll avoid listing a bunch of math unless someone wants to read it.

keeping it short.

being generous i gave our trucks 180% volumetric efficiency (they're well below that by my math), RPM at 3000, and used 30lbs of boost as a high average to err on the side of caution. (basically skew the numbers to force the need for improved intake flow.......i think i failed)

unless i'm more rusty than i thought, i came up with 561cfm as the high end of what our trucks will flow on the intake side under realistically high demand and regardless of the CFM of the various intake horns.

our stock horn will flow that, not much more, but it will.

if this is the case, am i correct in concluding that after market intake horns are really only helping with a little heat displacement?

i've been getting a lot of questions about my horn and don't want to misguide anyone. so far all i've commited to is that they're all better than stock and to pick the one that fits for desired future upgrades. but i'd like to tell em how they help.

jeff