Forwarded: Re: Forwarded: Re: Airflow measurement - again...

[RABBITT_Andrew at mv8.orbeng.com.au]

about 2.25%, based on dropping MAP from 100.1 kPa (1 atm - 5" H2O) to 
97.8 kPa (1 atm - 14" H2O).

Andrew Rabbitt

From: kleenair at ix.netcom.com:smtp
Date: ## 01/13/97 07:33 ##
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)?