Doug, this is what it looks like. I'll try to get into the manual to find
out the pin-out functions.
C. Smith



Thanks.  Some air appears to have to flow through the device adding to
restriction or enlargement of the manifold.  What size is it?  Do you
have an idea where it was place in the system?  I am guessing the air
box.

Doug in Japan


Doug,
On the fords, they are mounted in a 75mm dia plastic tube with the air
filter on the inlet side. That is for a 220 to 285hp engine series.
For the rotary, make a 70 to 75mm tube with a fabricated flange to mount the
air flow sensor. that will size it for up to 300 hp. Above that we go to the
Lightning 90mm body with the same sensor.
The 90mm lightning sensor body is good for 525 hp before it is maxed out.
It is better to be a little on the big side than small. When tuning we never
want the sensor output to be over 4.5 volts. the sensor "rails" at around
4.75 or 4.8 volts, and then just flows more air without telling the computer
you need more fuel.

Mount the tube on the inlet of the air box feeding the tuned inlet tubes.
ideal size for the box should be at least 4X the volume of the combined
tuned tubes, and more is better due to the strong pulsing.

Let me know if you need a model or drawing of the setup, as I have a
lightning unit on the shelf that I can measure and draw up.
I need to get together with Paul so he can publish a good "do and don't do"
list for using the ford maf sensors. used correctly, they are great. set up
wrong..... things go lean and ugly in a hurry. been there.
Larry