Hardware & BigComm Software Instruction Manual

BigStuff3 Pro SEFI System
Version 2.1 – February 2011 18
GM Northstar Direct Ignition System (DIS) Pin-out Detail
Connector Clip
BigStuff HEI Harness Connector
Pin A Pin B Pin C Pin D
To Coil Pack C4-E
To Coil Pack C4-C
To Coil Pack C4-D
To Coil Pack C4-F
To Coil Pack C4-B
ESC
BigStuff ESC Harness Connector
More GM Opti-spark ignition wiring information is ava
ilable on the Bigstuff3 website via this link:
http://bigstuff3.com/pdf/OPtiSpark%20to%20BS3%20HEI%20W
iring.pdf.
Back_to_Ignitions
To distributor connector pin D
Connector Clip
GM Opti-spark Ignition Pin-out Detail
BigStuff Harness Connector
Pin A Pin B Pin C Pin D
To Coil Driver Module - Connector B
To distributor connector pin A
Not Used