Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 82)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 81
To change a value in the Run Time 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 inputs shown in the table below can be used as a baseline.
54. dMAP Parameters
The Secondary Transient Fuel table is dMAP Parameter Configuration. This table is used to
control auxiliary MAP and TPS transient and base fuel functions.
The first entry of the dMAP Parameter Configuration table is Asynchronous Acceleration
Enrichment (AAE). It is used to set the MAP transient fuel thresholds relative to MAP (kPa) and
TPS (%) values. Below, is a brief description of each.
• MAP Limit: Establishes the MAP value in kPa at which the dMAP transient fuel is
disabled. For example, if the MAP Limit value is set to 80 kPa, the dTPSdt transient fuel
will be disabled above MAP values of 80 kPa.
• TPS % Clip: Establishes the TPS value, as a percentage, at which the dMAP transient
fuel is disabled. For example, if the TPS % Clip value is set to 80 %, the dMAP transient
fuel will be disabled above TPS values of 80 %.
The second entry of the dMAP Parameter Configuration table is Deceleration Fuel Cut Off
(DCFO). It is used to calibrate when the Base Fuel Map pulse width fuel is turned off and on
relative to MAP (kPa) values. Below, is a brief description of each.
• DCFO On: Establishes the MAP value in kPa at which the Base Fuel Map pulse width is
momentarily disabled. It is used to calibrate deceleration drivability. For example, if the
DCFO On value is set to 30 kPa, the base pulse width will go to zero, 2.5 seconds after