60143 Datasheet, PDF (9/12 Pages) Mallory performance club – MSD LS Ignition Control

INSTALLATION INSTRUCTIONS
9
MINIMUM ENGINE SPEED: This is the minimum engine speed that must be met to retard
the timing. If the “Step Retard” wire is activated below this RPM, it will have no effect and
will not retard the timing. Set this at 0 (zero) if you want the step retard to be active regard-
less of engine RPM.
ON RAMP TIME: The time that it will take to reach the full “Total Retard”. This will allow for
a softer timing retard over time. For example, if you have 10 degrees of Total Retard and
a 1 second ramp time, the controller will retard 1 degree every 0.1 seconds until the full 10
degrees of timing has been pulled out. This timer will not begin until the “Minimum Engine
Speed” is met. Setting On Ramp Time to 0 (zero) will cause an immediate timing retard cor-
responding to the Total Retard.
OFF DELAY: The time the Total Retard remains in effect after the “Step Retard” is deacti-
vated. This can ensure that the intake manifold is void of residual nitrous. This will also delay
the “Off Ramp Time” from starting - meaning that it is additive with respect to the Off Ramp
Time
OFF RAMP TIME: This will decay the effect of the Total Retard - effectively ramping timing
back into the motor instead of removing it instantaneously. Timing will start ramping back in
after the “Off Delay” has expired.
LAUNCH RETARD
The LAUNCH RETARD is used to set the ignition timing during the 10 seconds after the launch wire
is released. It can be helpful in optimizing traction immediately after launch. The Time From Launch
is a monitor item and it is used by the LAUNCH RETARD table.
Figure 6 Launch Retard.
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