Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI (LS1) System Hardware & BigComm Software - Manual (Page 15)

BigStuff3 Pro SEFI System (LS1)
Version 1.0 14
LS1 TPS Connector Pin-Out Goes To
Late Model GM or Ford TPS Connector
Pin-Out
A 5 Volt Reference C
B Ground A
C Signal B
Back_to_TPS
MAP (Manifold Absolute Pressure) – (Black 3-way Packard connector)
Connect to a LS1 style (0 to 1 BAR)
Manifold Absolute Pressure (MAP) sensor
located at the back of the manifold. For
normally aspirated engines, a 1 bar sensor
is used. For blown or turbocharged
applications a 2 BAR MAP sensor must be
used for boost pressures up to 15 PSI. For
boost pressures up to 30 PSI a 3 BAR MAP sensor must be used. If a 2 or 3 BAR MAP sensor is
used, the harness side MAP sensor connector must be replaced. Contact a BigStuff dealer if
questions come up related to the MAP sensor supplied with your system and to procure the
necessary connectors.
For speed/density applications the MAP sensor must be connected to an intake manifold port.
For Alpha/N systems use the sensor to sense ambient air pressure in the hood scoop or air
cleaner.
Note: The LS1 Cam, Crank and MAP sensors use the same 3-way Packard connector,
therefore be sure to connect each of the 3-way connectors to the appropriate sensor!!
LS1 MAP Connector Pin-Out Goes to
Standard GM 1-by-3 MAP
Connector Pin-Out
A 5 Volt Supply C
B Signal B
C Ground A
Back_to_MAP
LS1 Odd & Even Coil-On-Plug Connections [Two (2) Gray 7-way Packard Connectors]