Owners manual

INSTALLATION INSTRUCTIONS 5
MSD • WWW.MSDPERFORMANCE.COM • [phone] • FAX [phone]
PROGRAMMING
CYLINDER SELECT
The MSD is programmed for operation on 8-cylinder engines. If
installing the Ignition on a different style engine, the number of
cylinders will need to be selected by cutting the cylinder select
wire loops as shown in Figure 1.
Grounds: A poor ground connection can cause many frustrating problems. When a wire is specified
to go to ground, it should be connected to the battery negative terminal, engine block or chassis.
There should always be a ground strap between the engine and the chassis. Always securely connect
the ground wire to a clean, paint free metal surface.
Ballast Resistor: If your vehicle has a ballast resistor in-line with the coil wiring, it is recommended
to bypass it.
Routing Wires: The MSD wires should be routed away from direct heat sources such as exhaust
manifolds and headers and any sharp edges. The trigger wires should be routed separate from the
other wires and spark plug wires. It is best if they are routed along a ground plane such as the block
or firewall which creates an electrical shield. The magnetic pickup wires should always be routed
separately and should be twisted together to help reduce extraneous interference.
Figure 1 Programming the Number of
Cylinders.
DIGIT
AL 6AL
REV
LIMITER
Figure 2 Adjusting the Rev Limits.
REV LIMITER
The rev limiter can be set from 2,000 to 10,900 rpm. To adjust
the rev limiter of the Digital 6AL, remove the black cover next
to the LED by prying up with the supplied screwdriver. The
dial on the left is for 1,000 rpm increments, on the right is for
100 rpm increments.
For settings in the 10,000 rpm range, put the left dial to '1'
and use the right dial to set the 100 rpm increments. To have
no limiter, set both dials to zero. Note: The engine can be
running as you make adjustments to the rev limiter function.
If you have a tachometer connected to the MSD Gray wire,
the rev limit setting will display every time the key is cycled
to the On position (not cranking).
Playback Tach: If you use a playback tach, be sure to check the high rpm value prior to turning the key
to the On position. When the key is in the On position, the rev limit will be displayed and may override
the tach memory.
CYLINDERS WIRE LOOPS
8 No Cut Loops
6 Cut One Loop
4 Cut Both Loops
1,000's
100's