interesting quest.
Have you noticed how small in cross section the air inlet is in the air
box/air flow meter ?
Quite small there, and square or rectangular there, and sure looks smaller
than the round throttle body for sure.
I'd guess air speed through the air flow meter in that narrow spot is up
there.

I just thought of a crude way to calculate it roughly - assuming the
air-fuel ratio stays 'stoch' where it should ...........
from the amount of fuel used, you could calculate the amount of air , by
volume, that the engine consumes.

----- Original Message -----
From: "John Rodgers" <inua@CHARTER.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, July 27, 2008 4:38 PM
Subject: Induction air flow rates

> Volks,
>
> Can any of you really mechanically experienced folks give me some idea
> about induction flow rates - as in air intake flow rates that go to the
> engine through the intake manifolds. What would be the volume of air
> going into an engine at say, idle, cruise, top speed? Also the speed at
> which that air might be moving? This is an area about which I have no
> knowledge at all and could use such for some planning purposes.
>
> Thanks,
>
> John Rodgers
> 88 GL Driver