Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 83)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 82
falling below a MAP value of 30 kPa, with the throttle closed. The Base Fuel Map pulse
width is turned back on based upon the DCFO Off value (see DCFO Off).
• DCFO Off: Establishes the MAP value in kPa at which the Base Fuel Map pulse width is
re-enabled. It is used to calibrate deceleration drivability. Typically, the DCFO Off value
is set to 5 kPa above the DCFO On value. For example, if the DCFO On value is set to 30
kPa the DCFO Off value should be set to 35 kPa. Once the MAP value exceeds 35 kPa,
the Base Fuel Map pulse width is turned back on.
The third and final entry of the dMAP Parameter Configuration table is Acceleration Enrichment
(AE) Temperature. It is used to disable the affect of the Run Time Correction multiplicative
scalar value has on the Positive dMAP Correction and dTPS Transient fuel values relative to an
engine coolant temperature (deg F). Below, is a brief description of the AE Temperature “Run
Temperature” setting.
Run Temperature: Establishes the engine coolant temperature in deg F at which the Run Time
Correction multiplicative scalar term no longer influences the Positive dMAP Correction or TPS
Transient fuel values. Therefore, if the Run Temperature value is set to 120
o
F, the Run Time
Correction multiplicative scalar term will no longer influence the Positive dMAP Correction or
TPS Transient fuel values at engine coolant temperatures above 120
o
F.
To change a value in these tables, move the cursor using the PC’s mouse or arrow keys to the
cell to be changed and input the desired value. Then click on OK to save the changes.
TPS Transient Fuel
The TPS transient fuel control is comprised of 2 primary tables. Each of the table’s play an
integral role as to how the TPS Transient Fuel requirements are calibrated for abrupt throttle
changes that causes the engine to accelerate. TPS transient fuel is asynchronously injected