MAF transfer curves

[Shirley, Mark R]

If you know somebody with a flow bench, you could get the data by empirical
means.

-----Original Message-----
From: Rob O [mailto:rjo1 at home.com]
Sent: Wednesday, January 03, 2001 10:06 PM
To: diy_efi at diy-efi.org
Subject: Re: MAF transfer curves


Anyone got charts for the KV flowmeters used on the Talon/Eclipse/Laser?
I'd like to use something like the pro-flo 75MM bullet but need to do a
voltage/frequency convertor and have no clue as to where to start on the
conversion tables

Rob_O

"Shirley, Mark R" wrote:
> 
> At least on the Ford MAF's I had transfer functions for,
> they were all linear voltage 0-5V with a little rolloff on
> both ends.  These were Hitachi parts.
> 
> -----Original Message-----
> From: Bruce Plecan [mailto:nacelp at bright.net]
> Sent: Wednesday, January 03, 2001 9:55 AM
> To: diy_efi at diy-efi.org
> Subject: Re: MAF transfer curves
> 
> Some are even frequency.
> I wouldn't say anything universaily applies about MAFs
> Bruce
> 
> > Different transfer curves for MAFs?
> > Is this true?? I was led to believe that voltage output was linear
> > with respect to airflow for all makes. The only difference being
> > the sizes and connectors used. I don't mean to question Chris but
> > This would have some serious implications for my flapper-conversion
> > project so I'm very curious.
> > Thanks,
> > Rod
> >
> >
> >
> >
> >
> > >Date: Sat, 30 Dec 2000 00:36:47 -0500
> > >From: Chris Conlon <synchris at ricochet.net>
> > >Subject: MAF transfer curves
> >
> > >I was wondering a bit about MAF transfer curves.
> >
> > >I seem to remember people mentioning that some MAFs (GM perhaps)
> > >had a voltage output that was linear with respect to airflow.
> >
> > >In the archives I found that someone else, using a Bosch MAF,
> > >found that airflow varied as the square of voltage. (Or, voltage
> > >output varied as the square root of airflow.)
> >
> > >Looking at the curve for a random Pro-flow MAF
> > ><http://www.pro-flow.com/24flow.htm>
> > >it appears that airflow varies as the cube of the voltage. (If you
> > >plot V vs the cube root of airflow, you get a straight line.) As
> > >near as I can tell these units are intended for Ford applications.
> >
> > >I wonder what other transfer curves are out there? Are there any
> > >logarithmic MAFs?
> >
> >    Chris C.
> >
> >
> >
> >
> >
> >
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> >
> 
>
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