Edelbrock 3670 User Manual - page 158

158

4.8

Ignition Sync Offset

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Ignition Sync Offset Tool

It is necessary before beginning any calibration efforts to set the ignition timing

reference (Ignition Sync). The function of the Ignition synchronization is to match the

actual Top Dead Center location of the #1 cylinder - to the software so that the system

displays the timing events that the engine actually sees. (The timing light should agree

with the laptop). The Ignition Sync offset tool is used to make the adjustments to the

Ignition Sync offset even while the engine is running. While you are able to set the offset

in the setup wizard; there may be instances where you might need to make a minor

adjustment of the offset "on the fly" to make up for errors in the degree wheel, timing

markings, or erroneous timing light.

The control panel allows you to change the offset by either typing in the Ignition Sync

Offset text box or by moving the slider. RPM and Spark Advance are displayed to help

you synchronize with a timing light (if necessary). In addition, you can lock the spark

advance by clicking the "Lock Spark" button. This insures that the timing will not be

changed by the ecu while you synchronize the offset.

Tuning Tips:

Make sure your distributor is setup per instructions before setting the ignition

sync!

Run engine at about 2200 rpm with timing light on #1 cylinder and an accurately setup

timing pointer on the damper. Lock the spark by depressing the Lock Spark button. Note