Owners manual

INSTALLATION INSTRUCTIONS 11
MSD • WWW.MSDPERFORMANCE.COM • [phone] • FAX [phone]
Step Retard Ramp: The retard step can be ramped to and from its full retard amount over a time
based program (Figure 12). It is adjustable from 0-2.5 seconds in 0.01 second increments. Default
is zero for both On and Off.
RPM: The minimum engine rpm that must be reached before a step retard is activated.
On: The amount of time it takes for the step retard to reach its Retard Degree. Allows a gradual
ramp On time to reach the Retard Degree. User adjustable from 0.00 to 2.50 sec. (0.01 sec.
increments).
Off: The amount of time it takes for the step to retard to reach NO retard. Allows a gradual ramp
Off time to reach NO Retard. User adjustable from 0.00 to 2.50 sec. (0.01 sec. increments).
Deg: The amount of retard.
Note: All of the retard amounts are cumulative and the maximum amount of retard is 30°.
BOOST RETARD CURVE
This timing curve can be programmed in relation to boost/vacuum pressure within the intake manifold.
The curve can be programmed from 2 psia-45 psia in 0.25 psia from 0°-25° in 0.1° increments. Up to
32 different points can be input on the Boost Chart. Also, all of these points are interpolated every
millisecond to create a smooth (no steps) curve. This curve can easily be edited using the Boost
Curve chart in the Pro-Data+ software. An MSD MAP sensor is required to use this feature and three
are offered:
1-Bar, for normally aspirated engines, PN 23111
2-Bar, for 2-30 psia, PN 23121
3-Bar, for 2-45 psia, PN 23131
Note: The Boost Retard Curve default is 0° retard.
Rev Average: This allows you to program the number of engine revolutions that occur to pro-
duce an average boost value. It is adjustable in 2, 4, 6 or 8 crankshaft revolutions. This function is
designed to help average the boost pressure to provide an accurate reading. The default is two
revolutions which should be ideal for the majority of applications.
PSI Sensor: This allows you to input the specification of the MAP sensor. Select a 15 psia, 30 psia
or 45 psia sensor. Default is 15 psia.
RUN RETARD CURVE
This program provides the ability to create a timing curve. The curve can be programmed from 0-12,500
rpm in 0.1° increments for every 100 rpm. You can program up to 32 different points on the map. Also,
all of these points are interpolated every millisecond to create a smooth (no steps) curve.
CYLINDER COUNT
CylCnt: This is the number of cylinders of the engine. Programmable for 4, 6 and 8-cylinders.
Once a change has been made, turn the ignition Off and On to reset.
HALL-EFFECT/ECU TRIGGER
The White/Blue wire can be used as the ignition trigger source with a Hall-effect distributor or ECU
trigger signal. Default is for Hall sensor. To use as an ECU trigger, ECU must be selected in the menu
(see page 14). Figure 4 and 5 show diagrams with the ECU trigger. Note that a distributor is still re-
quired.