Ignition systems setup, Hei ignition – (black, 4-way packard connector), Ignition – Precision Turbo and Engine BigStuff3 GEN3 PRO SEFI System Hardware & BigComm Software User Manual
Page 18
BigStuff3 Pro SEFI System
Version 2.1 – February 2011
15
The positive and negative battery cable lengths have been designed (are long enough) to accommodate
a trunk-mounted battery. If the cable lengths are not long enough, splice, solder and shrink wrap AWG
8 wire the remaining distance to the battery. Make sure the two clearly marked black wires battery (-)
are
securely fastened to the negative battery post
(NO EXCEPTIONS).
The red cable battery (+)
must be securely fastened to the positive (+) battery post. Connecting the positive and negative cables
to the wrong battery post
will damage the ECU
. This type of damage is easy to identify, and is not
covered under the factory warranty. To avoid the potential of severely damaging the ECU,
connect the
head connectors to the ECU only after the battery connections are properly made
.
Ignition Systems Setup
For additional information on ignition system setups, go to the BigStuff3 website, and then the
document titled Ignition System Setup Tutorial. The link is:
Setup Tutorial
document covers the following nine (9) ignition system setups:
1. Stand-alone IPU Distributor Only
2. Modified IPU Distributor (serving as the cam sync) with a Crank Trigger Setup
3. MSD Distributor Used to Only Distribute Spark from an MSD 6A/7A/8A,… box, with a Crank
Trigger.
4. MSD 2340 Cam Sync Distributor with a Crank Trigger Setup
5. MSD All-in-One, Crank and Cam Sync Distributor
6. GM’s CAM Sync Drive with BigStuff3’s 24 Tooth Crank Wheel.
7. MSD Mag44 Magneto
8. GM LS1/2/7 COP System
9. Ford Mod Motor COP System
Also in the “How-to/Help” section of the website there is additional information on the setting up the
Ford TFI, GM HEI, GM Opti-spark & MSD8 ignition systems. More information, along with the
appropriate links to the website, is provided below.
HEI Ignition – (Black, 4-way Packard connector)
The main harness HEI connection is designed to work with
a GM Y-car (Corvette) distributor. The HEI connection
also includes a “bypass” connector for setting the timing.
Re-configuring the A, B, C and D pins of the main harness
HEI connector allows for other types of types of ignition systems to be used. The diagrams below
outline connector configurations that can be made to interface with Ford TFI, Buick DIS, GM
Optispark and GM Northstar ignition systems.
GM Y & F
car bypass
connector
HEI connector