Twin distributed ignition – Haltech E6X Manual Win Version User Manual

Page 104

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E6X Manual

104

This gives a mid point, half way between the minimum and maximum timing, of 25°. Rotate
the engine to this value (25°) BTDC. Align the centre of the rotor button with the plug lead
terminal for cylinder number one. Lock the distributor into place and do not move it.

Now rotate the engine to 70° BTDC. i.e. move it back 45° crank degrees. This is now the
position where the sensor inside the distributor will need to be aligned with a triggering point.
(This may be a magnetic sensor tooth, or a chopper disc window). Move the plate the sensor
is mounted on so that this occurs (Do not rotate the engine!).

If it is not possible to move the sensor, it will be necessary to rotate the trigger wheel relative
to the shaft and the sensor.

Rotor phasing is not only a problem on distributors with advance mechanisms. Several factory
distributors have their triggers at points outside 60 - 100°. It is not advisable to just rotate the
distributor until the trigger is within this window. Care must be taken to ensure that the rotor
phasing will not cause a problem.

Below is how the ignition outputs will be configured in the Distributor Ignition output mode.

ECU Output

Connection / Function

Ignition # 1

Ignition Output for Coil (Connected via ignition module)

Ignition # 2

Available for Digital Output use

Ignition # 3

Available for Digital Output use

Ignition # 4

Not available for use with this configuration.

Twin Distributed Ignition

Twin distributors can usually be found on some large V configuration engines, with one
distributor for each bank of cylinders. The ignition outputs for a twin distributor will be as
follows:


ECU Output

Connection / Function

Ignition # 1

Ignition Output for Coil 1 (Connected via ignition module)

Ignition # 2

Ignition Output for Coil 2 (Connected via ignition module)

Ignition # 3

Available for Digital Output use

Ignition # 4

Not available for use with this configuration.










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