Specifications

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MSD Pro-Billet Digital E-Curve Distributor

Chrysler, 318, 340, 360

PN 8504 - U.S. Patent 6820602

Important: Read these Instructions before attempting the installation.

Parts Included:

1 - Digital E-Curve Distributor

1 - Rotor, PN 8467

1 - Distributor Cap, PN 8433

1 - Wire Retainer

2 - 1.5" Self Tapping Screws

Note: 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.

1 - 3-Pin Harness

1 - O-Ring

1 - Timing Tape Set, PN 8985

WARNING: Before installing the MSD Digital E-Curve Distributor, disconnect the bat-

tery cables. When disconnecting the battery cables, always remove the

Negative (-) cable first and install it last.

MSD IGNITION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344

Figure 1 Rotary Dial Adjustments.

Timing

Switch 1

Timing Switch 2

Rev

Limiter

Summary of content (8 pages)

PAGE 1
MSD Pro-Billet Digital E-Curve Distributor Chrysler, 318, 340, 360 PN 8504 - U.S. Patent 6820602 Important: Read these Instructions before attempting the installation. Pa r t s I n c l u d e d : 1 - Digital E-Curve Distributor 1 - Rotor, PN 8467 1 - Distributor Cap, PN 8433 1 - Wire Retainer 2 - 1.5" Self Tapping Screws 1 - 3-Pin Harness 1 - O-Ring 1 - Timing Tape Set, PN 8985 WARNING: Before installing the MSD Digital E-Curve Distributor, disconnect the battery cables.
PAGE 2
INSTALLATION INSTRUCTIONS Total Timing: This is the total amount of timing that the engine will achieve. This is the amount that all of the electronic curve and settings will be based from. This setting also includes any amount of vacuum advance that you plan to use. Vacuum Advance: The vacuum advance will advance the timing under part throttle conditions when the engine is not under a heavy load. This advance is added on to the electronic timing curve as well. The advance will begin as low as 4-in.
PAGE 3
INSTALLATION INSTRUCTIONS 3 As you can see from the chart, most factors will change throughout the range of the engine operation. The Digital E-Curve allows you to make timing changes based on these factors. Example: An engine has 11:1 compression, a high energy ignition and turns 5,500 rpm. With the specifications given, you will have to retard the timing for the high compression and high energy ignition. By comparing the engine’s specifications against the chart, a usable timing guideline can be found.
PAGE 4
INSTALLATION INSTRUCTIONS Figure 3 Available Timing Curves. Figure 4 Advance Curve Switch Position. MSD IGNITION • 1490 HENRY BRENNAN DR.
PAGE 5
INSTALLATION INSTRUCTIONS 5 INSTALLING THE DISTRIBUTOR Note: When installing the distributor for the first time, it is recommended to place the switches in the locked-out timing position. This will assist you in setting the timing curve by ensuring that the total timing is correct. 1. Remove the existing distributor cap without disconnecting any of the spark plug wires. 2. With the cap off, crank the engine until the rotor is aimed at a fixed point on the engine or firewall.
PAGE 6
INSTALLATION INSTRUCTIONS RED TO COIL POSTIVE + 12 VOLTS ORANGE TO COIL NEGATIVE - BLACK TO ENGINE GROUND GREEN TO TACH OUTPUT Figure 6 Wiring the Ready-to-Run Chevrolet Distributor. NOTE: THE DIGITAL E-CURVE DISTRIBUTORS DO NOT REQUIRE AN MSD IGNITION, THOUGH THEY CAN BE USED WITH ONE. THE TIMING CURVE AND RPM LIMIT WILL STILL FUNCTION. Figure 7 Connecting an MSD Ignition Control to the Digital E-Curve Distributor. MSD IGNITION • 1490 HENRY BRENNAN DR.
PAGE 7
INSTALLATION INSTRUCTIONS 7 INSTALLING THE TIMING TAPE 1. Locate the top-dead center or 0° mark on the harmonic balancer or timing wheel. 2. Select the correct timing tape for your application. Make sure you know the correct size of the harmonic balancer or timing wheel you’re using. If this is not known, measure the diameter of the harmonic balancer or timing wheel’s edge and note the size. 3. Choose the timing tape that matches your balancer’s diameter.
PAGE 8
Installation Option: This Cap can also be bolted down to an MSD Pro-Billet or Billet Distributor base with the supplied hardware. To accomplish this, the spring clips must be cut off (Figure 9). Note: When the cap is bolted down, the location of the spark plug wires must be changed. Figure 9 Optional Installation by Bolting the Cap Down. Service In case of malfunction, this MSD component will be repaired free of charge according to the terms of the warranty.