Volumetric efficiency (Re: Equations..)

[Edward Hernandez R]

> With regard to determining volumetric efficiency ...
> 
> You need some form of air flow meter to measure the actual
> amount of air that is inducted by the engine.  (This actual
> measurement is then compared to the displacement of the engine.)
> The air flow meter doesn't have to be fancy or even electronic.
> Jim (Staff), the simplest approach I can think of is to use
> a standard orifice or a laminar flow meter.  You can use a 
> simple water manometer to measure the pressure drop across
> these devices (just make sure that all the air that goes
> into your engine goes through the device too - buy some duct 
> tape).  To convert from pressure drop to mass flow rate, you'll
> need to know the flow coefficient for the standard orifice or
> a calibration curve for the laminar flow meter.  Ask your physics
> teacher if your school has such equipment.

Remember that one of Jim Staff's problems is that he has no dyno. This
method requires steady state loading at WOT. I'd like to know what
he's building first.