Converting vane type airflow meter to MAF

[Bruce Plecan]

-----Original Message-----
From: Brian Franchuk <Brian.Franchuk at drizzle.mm.com>
To: DIY_EFI at efi332.eng.ohio-state.edu <DIY_EFI at efi332.eng.ohio-state.edu>
Date: Tuesday, January 19, 1999 9:28 PM
Subject: Converting vane type airflow meter to MAF

Where ya going to get the MAF?.  How are you going to determine
exactly how it works?.  Is it's ouput linear, etc?.  How are you going
to test it's calibration?.
  Might just think of a MAP sensor.  
If anyway possible put a palm scope on it and see exactly what it's
output is from idle to WOT.
Cheers
Bruce




I just joined this list a couple days ago so I applogize if this is a 
repeat question.  I am trying to determine the feasibility of 
converting the vane type airflow meter in my 88 BMW 535i to a MAF 
system.  My main reasons for doing this are the increased airflow to 
the engine (more HP) and the reliability (no moving parts).  My 
questions are:

1) Are my assumptions above correct?

2) How difficult is this conversion to do?  I am an embedded systems 
   programmer so the software isn't really a problem.  What I really 
   need to know is how complex is the conversion algorithm?  Do I 
   need to add a MAP or a trottle position sensor?

3) Are there any books you can recommend for this type of project?

4) Is there is good "hobbyist" MAF out there that will fit well to 
   this engine (3.5l ~6600 RPM ~220 HP).  I can deal with voltage or 
   pulse output.  I was thinking of using a sensor from a 5.0 l
   Mustang since it would be easy to find a replacement if necessary.

Thanks.

Brian Franchuk