Edelbrock Pro-Tuner, User Manual

Page: 159 / 235

Basic Tuning with the Pro Tuner System 159
the spark advance value displayed. Check the actual spark advance with the timing light.
Move the slider or type in the value higher or lower by moving the number of degrees of
difference between the readings. For example, if the display shows 18 degrees and the
timing light shows the engine at 22 degrees, move the offset 4 degrees to bring the
actual timing into agreement with the display. Recheck timing and adjust until both
readings agree. Unlock spark. Save calibration.
No further adjustment should be necessary unless the distributor is removed for
service. Always recalibrate the offset if distributor is disturbed for any reason.