Individual cylinder, Individual_cylinder, Enter – Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software User Manual
Page 95
BigStuff3 Pro SEFI System
Version 2.1 – February 2011
88
2.0 ms) at a 24% throttle position, the ECU would immediately look up the corresponding AE Position
correction value of let’s say -13%. The ECU will then decrease the 2.0 ms pulse by 13% and output a
1.74 ms pulse. If the same 10
o
/second dTPSdt event occurred at a 48% throttle position and the
corresponding AE Position Correction value was -31% the APW would then be 2.0 ms – 31% or 1.38
ms.
While the engine is running, a “real-time Ellipse” will move within the AE Position Correction table
relative to the current TPS % “operating point”. Use it as a point of reference to help calibrate the AE
Position Correction table.
To change a value in the AE Position Correction table, move the cursor using the PC’s mouse or
arrow keys to the cell to be changed. Input the desired value and hit
“Enter”
to save the change.
The greater the TPS %, the larger the AE Position Correction table value needs to be. The inputs
shown in the table below can be used as a baseline.
57. Individual Cylinder
Individual cylinder control allows the user to define the amount of fuel (positive and negative) and
spark advance/retard correction for each cylinder. This feature is used to “calibrate out” intake
manifold inefficiencies.
Note:
A cam input (cam sync) is required for individual spark control, and injector phasing to
be operational
. Without a cam sync the GEN3 system still injects fuel sequentially and allows for
individual fuel control per cylinder. All coil-on-plug systems must have the cam input (cam sync)
hooked up and operational. For additional information on how to set up and configure a cam sync, go
to the BigStuff3 website, then to How To/Help/Ignition system Setup Tutorial. The link is:
From the Main Menu screen Tool Bar, left click on “Individual Cylinder.” The screen below will
open. The following paragraphs will describe how to calibrate each of the Individual Cylinder drop
down selections.