It really needs to be tied to whatever the carbs are seeing at the intake.
The air correctors draw from the top of the float bowl, and critically, it affects float level if it's not
the same as the throat.
So with a 'ram' style filter, as shown, it'll be fine... until the ram effect of the
intake kicks in, and all of a sudden, you go lean.
Or the filter restricts airflow at 3k, and whups, all rich all over the place.
Of course, if the effect is consistent, you can tune for it- it's when it's not affected by
the usual suspects that you run into trouble...
t
was absolutely confused by a standing wave in an intake, once...