Owner's manual

Page 15
Now that you’re starting to grasp absolute pressure, you might wonder why the F/IC
reads absolute pressure. Well, absolute pressure is the only accurate, repeatable way
to measure manifold pressure. Measuring only “Boost” pressure does not account for
changes in atmospheric pressure. Changes in atmospheric pressure will cause changes
in manifold pressure. For example, let’s consider a boost gauge at high elevation, where
atmospheric pressure is 12.7 psi
a
. A boost gauge reading of 10 psi will give an absolute
pressure of 22.7 psi
a
(12.7 + 10). Now, take the same boost gauge at sea level, where
atmospheric pressure is 14.7 psi
a
. A boost gauge reading of 10 psi now gives an
absolute pressure of 24.7 psi
a
(10 + 14.7). The boost gauge displayed 10 psi boost in
both locations, however, the absolute pressure was two psi greater at sea level. By
measuring absolute pressure, instead of gauge pressure, the F/IC can be tuned
correctly for all operating conditions.
Loading the F/IC software
To load the software, double click the file “FICRelease080609.exe”. Follow the
on-screen dialogue to finish the install. Load the USB drivers by double clicking on the
file “CDM 2.02.04.exe” (C:\Program Files\AEM\FIC). Latest software versions can be
found on the Electronics Forums at
http://forum.aempower.com/forum/index.php/board,89.0.html.
Opening a Calibration
(Note: Changes made to F/IC calibrations are made real-time and are autosaved
on the calibration that is currently open. If you do not want to modify a file, it is
recommended that you save the file under a different name using the “Save As”
function.) Start the F/IC software by double clicking on the “AEM FIC” icon on your
desktop. Go to File>Open and locate the file “Base Cal.fi6”. If the default file locations
were used to load the software, the “Base Cal.fi6” file should be found in the FIC folder
C:\Program files\AEM\FIC\. See Figure 27.
Figure 27: Open File