MSD 8680 Adjustable Timing Control Installation - Manual

IMPORTANT: Read the instructions before attempting installation.
Parts Included:
1 - Timing Control, PN 8680 1 - Control Knob
1 - 3/8" Bushing 1 - 2-Pin Weathertight Connector
4 - Self Tapping Screws
Note: The MSD PN 8680 Timing Control must be used with an MSD Ignition Control. It is recommended
to install the MSD Ignition first.
MOUNTING
The Timing Computer may be mounted in the engine compartment as long
as it is away from direct engine heat sources. Make sure all of the wires reach
their connections before mounting the unit. Use the Control as a template
and mark the mounting holes. Remove the unit and drill the mounting holes
using an 1/8" drill bit. Four self tapping screws are supplied to mount the unit.
Note: Before mounting the unit, install the supplied grommets and sleeves
as shown in Figure 1.
PROGRAMMING
The Timing Control is programmed for 8-cylinder. If installing the PN 8680 on
a 4 or 6-cylinder, the Control must be programmed.
Locate the Cylinder Select cover on the side of the
unit and remove the single Phillips screw (Figure 2).
Number of Cylinders: The Red loop and the Blue
loop are responsible for cylinder programming. The
chart in Figure 2 shows which loop(s) to cut.
Note: After cutting a loop, position the wire ends
away from each other so they cannot make
contact.
WARNING: During installation, disconnect the battery cables. When disconnecting the battery,
always remove the Negative cable first and install it last.
Figure 1 Installing the
Vibration Mounts.
Figure 2 Selecting the Number of Cylinders.
CYLINDERS CUT LOOPS
8 NONE
6 RED
4 RED AND BLUE
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Adjustable Timing Control
PN 8680
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