Air Flow Measurement

[kleenair at ix.netcom.com]

Robert McElroy wrote:
> 
>         What methods have been used to measure intake air flow other than the heated-wire sensor and the Bosch air-flap (that silly door 
thingy just ahead of t
> 
>         Specifically, I am wondering if anyone has looked into using a differential-pressure manometer to calculate air flow.  This manometer 
could be located
> 
> (FYI - Air flow could be calculated from a differential pressure manometer by measuring air pressure in an appropriately sized (perhaps 4 
inch dia.) venturi lo
> 
> Bob McElroyThis is achievable, the only problem is any restriction in the air intake 
reduces peak air flow to the engine, so its not the best method for 
power.  I have some experience with venture based gasous fuel systems 
which work on a pressure differential principle.  I don't know what size 
engine you have in mind, but for anything smaller than a small block V8, 
a four inch venture may be too big to register any meaningful data at 
idle and light load.

M. Ebrahimi