Dual Sync Distributor - MegaSquirt MS3 Hardware Manual

MS3base/V3.0 Hardware Guide
Typical Settings
Spark mode = "Basic Trigger"
Ignition capture = "Rising Edge"
Spark output = "Going Low"
Spark A output pin = "LEDs Spark"
Dwell type = "Standard Dwell"
Nominal Dwell = "3.0"
GM/HEI options = "GM bypass"

6.6 Dual Sync Distributor

A dual-sync distributor is an aftermarket locked distributor that provides a clean trigger signal for an ECU. The
signal can be used for sequential fuel in some situations.
As Megasquirt has only two fuel channels, it is simplest to ignore the "reference" signal from the distributor and
configure as a regular distributor using "Basic Trigger."
Setting the rotor arm phasing is important as shown in 6.2.1.2.
Alternative: It is possible to use both signals from the dual-sync distributor and control a distributorless ignition
system (wasted spark or wasted-COP.) In this case use the "Dual wheel" option in the Trigger Wheel system.
Setting the rotor arm phasing is important as shown in 6.2.1.2, then determine the tooth#1 angle from the
Trigger Wheel page.
(c) 2014-6 James Murray 2016-11-13
Page 124/222