Forwarded: Re: Airflow measurement - again...

kleenair at ix.netcom.com kleenair at ix.netcom.com
Mon Jan 13 13:04:23 GMT 1997


Todd Knighton wrote:
> 
> Mazda Ebrahimi wrote:
> >
> > That's a good question.  Also, I don't know much about the vane meters
> > (I have never actually seen one on an engine), but are they not a little
> > restrictive?
> 
> Mazda,
>         I've measured the pressure drop of a vane type air flow meter on a 911
> engine before.  If I remember right, it was about 14" H20 at redline.
> The thing maintained about 5" H20 from about 1000 to 4500 rpm's at full
> throttle where it was fully opened, then sloped up to 14" by 6500 rpm's.
> 
> Todd Knighton
> Protomotive Engineering

Thanks Todd,

Do you know roughly what percentage power drop that equates to (from 5" 
at 6000 to 14" at 6000)?



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