Before installing the MSD Digital E-Curve Distributor, disconnect the battery cables. When disconnecting the battery cables, always remove the Negative (-) cable first and install it last.
The terminals of this Digital E-Curve Distributor require spark plug style terminals. You may need to change the terminals and boots of your wires. MSD offers two kits, PN 8849 or PN 8848 that are supplied with nine boots and terminals.

DIGITAL E-CURVE FUNCTIONS RPM LIMIT
This distributor is equipped with an adjustable rev limiter. It is adjustable from 5,000 – 10,000 rpm by a rotary dial under the cap and rotor (Figure 1). The rpm will not exceed your selected amount to protect the engine from overrev damage.

TIMING FUNCTIONS
Electronic Advance Curve Operation: The Electronic
Advance Curve is managed by a microprocessor built into the ignition module. You can program an electronic timing advance curve by adjusting two rotary switches under the distributor cap (Figure 1). A magnetic pickup is used as a trigger device that tells the ignition module when to fire the coil. The pickup is triggered by a reluctor mounted to the distributor shaft. This means that you have to set the distributor at the highest, or Total, amount of advance that you want to achieve (including vacuum advance) and compensate with one of the selectable ignition curves (shown on page 4). Following are important definitions that will be used to set up your timing.

Electronic Centrifugal Advance: Since this distributor is all electronic, there really is no mechanical or centrifugal advance. On a standard distributor, this advance would be called centrifugal so it will be referred to as the electronic centrifugal advance. The chart on page 4 shows all of the different combinations you can achieve by simply turning the two rotary dials located under the distributor cap.

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