MSD -8 Plus Installation Instructions Manual

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Note:
Solid Core spark plug wires cannot be used with an MSD Ignition.
Parts Included:
1 - MSD-8 Plus Ignition
1 - Mag Pickup Extension Harness, PN 8860
4 - Vibration Mounts and Hardware
4 - RPM Modules: 3K, 7K, 8K and 9K
WARNING: Before installing the MSD Distributor, disconnect the battery cables. When disconnecting
the battery cables, always remove the Negative (-) cable first and install it last.
FEATURES
SINGLE OR DUAL COIL OUTPUT
The MSD-8 Plus Ignition Control is intended for racing use only. The Ignition has the ability to be
used with single or dual coil systems. Note that when using a single coil, both coil positive wires must
be connected to the coil.
RPM LIMITERS
The MSD-8 Plus Ignition is equipped with a 2-Step Rev Control. The Ignition will accept two rpm
modules so two different rev limits can be set. One rev limit can be used for over-rev protection while
the second limit can be activated on the starting line for a lower rpm limit to assist in staging and for
consistent holeshots. When 12 volts are applied
to the 2-Step terminal (2'S'), Module 1 is active.
Module 2 is active when there is no 12 volts.
CYLINDER SELECT
This ignition can be used on 2, 4, 6 (even-fire)
or 8-cylinder engines. The ignition is set for
8-cylinder operation. To program the unit for
other engines, remove the one screw that holds
the cover to reveal three wire loops (Figure
1). Cutting a wire loop determines the cylinder
selection.
SPARK LED
When the coil fires, current is sensed and this LED will flash. These LEDs confirm that the ignition
has received a trigger signal and that the ignition is working properly. Each time a coil fires, current
is sensed and the corresponding LED will flash. (If the coil is not connected, the LED will not flash.)
When the engine is running, it will appear solid.
M S D
• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
MSD-8 Plus Ignition
PN 7805
1 - PN 8830 Filter
1 - Coil Harness
1 - Power Harness
1 - Parts Bag, Mounts, Terminals, etc.
Cylinders Loops to Cut
8 None
6 One
4 Two
2 Three
Cut loops
Figure 1 Cylinder Programming.
Remove cap