MSD 6440 40th Anniversary 6AL Ignition Control Installation User Manual

Page 4

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INSTALLATION INSTRUCTIONS

M S D I G N I T I O N

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MOuNTINg

The MSD can be mounted in most positions, except directly upside down (if upside down, moisture

or water cannot escape). It can be mounted in the engine compartment as long as it is away from

direct engine heat sources. It is not recommended to mount the unit in an enclosed area such as

the glovebox.

When you find a suitable location to mount the unit, make sure the wires of the ignition reach their

connections. Hold the Ignition in place and mark the location of the mounting holes, use a 3/16" drill

bit and drill the holes for the supplied vibration mounts. Install the vibration mounts, then mount the

Ignition.

CYLINDER SELECT

The Soft Touch Rev Limiter that is built into the Ignition is programmed for operation on a 8-cylinder

engine. If you are installing one of these units on a 4 or 6-cylinder even-fire engine, the ignition must

be modified. This is easily achieved through the cylinder select device on the side of the ignition. To

program the unit:

1. Locate and remove the round black cover with a single Phillips screw.

2. There are two wire loops, a Red and Blue loop. Refer to the chart in Figure 2 to determine which

loop to cut for your application.

3. After cutting the loop(s), turn the wire ends away from each other so they cannot come into contact.

Install the cover and screw.

WIRINg

geNeral WiriNg iNFOrMatiON

Wire Length: All of the wires of the MSD Ignition may be shortened as long as quality connectors

are used or soldered in place. To lengthen the wires, use one size bigger gauge wire (10 gauge for

the power leads and 16 gauge for the other wires) with the proper connections. All connections must

be soldered and sealed.

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.

Figure 2 Selecting the number of Cylinders.

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