Building a Flow bench, motor speed:flow

[The Punisher]

Restrictor orifaces SUCK (pun intentional) The electronic controlled 
superflow 600's have all the traditional manometer and oriface's ect.. But 
the little computer just trys to maintain the test pressure by regulating 
the motor speed. it then uses some sort of map sensors inside the 
controller(might be like megasquirt) to calculate the flow. IIRC you just 
run it on the biggest oriface and wait for the reading to stabelize (takes 
several seconds). Very simple.
Also instead of one big,expensive,complex blower, just use several small 
inexpensive ones in parallel. Thats how alot of flow benches are made.


>From: "The Dupuis" <dupuis10 at telusplanet.net>
>Reply-To: diy_efi at diy-efi.org
>To: <diy_efi at diy-efi.org>
>Subject: RE: Building a Flow bench, was: Measuring air flow
>Date: Sun, 27 Jan 2002 14:51:18 -0700
>
>Gus Mahon uses a leaf blower that makes 13" fully stalled.  I think this
>would work but you'd have to use more than one, or measure flow AND 
>pressure
>drop and calculate go get to a standard known pressure drop.  Obviously,
>with the correct air pumps you'd regulate airflow to arrive at a known
>pressure drop and then measure the airflow, but with a pump that small,
>you'd have to run it wide open and measure both.
>
>I don't know how fast you hope to spin the turbo with an AC motor, as there
>are none that spin faster than 3550 rpm.   How powerful and fast a DC motor
>do you have?  interesting prospect though, being able to regulate the speed
>of a DC motor to vary airflow rather than use a restrictor orifice.
>
> > -----Original Message-----
> > From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> > Behalf Of 944Technologist
> > Sent: January 27, 2002 4:17 AM
> > To: diy_efi at diy-efi.org
> > Subject: Re: Building a Flow bench, was: Measuring air flow
> >
> >
> > I was looking at using a leaf blower. It has a dead gas engine
> > but it looks
> > easy enough to convert it to electric. Or add an electric motor to a
> > 924Turbo Turbocharger that I have laying around.
> >
> > FR Wilk
> >
> > From: "Eric Aos" <eoa at spartek.com>
> > > The furnace blower fan doesn't have enough vacuum (I tried one
> > once). Get
> > > the fans from http://www.grainger.com/ , you can order the same
> > ones that
> > > are used in a shop vac.
> >
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