PN8534 Datasheet, PDF (1/8 Pages) Mallory performance club – MSD Pro-Billet Chrysler V8 Distributor

MSD Pro-Billet Chrysler V8 Distributor
PN 8534 - 273, 318, 360
PN 8543 - 331/354 Early Hemi
PN 8544 - 392 Early Hemi
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Important:  Read these instructions before attempting the installation.
Note: An MSD Ignition Control is required to use these distributors.
Parts Included:
1 - Pro-Billet Distributor
1 - Rotor, PN 8467
1 - Distributor Cap, PN 8433
1 - Wire Retainer
2 - 1.5" Self Tapping Screws
2 - 10-32 x 3/4" Socket Head Screws
1 - Advance Kit
1 - O-Ring
1 - Vacuum Advance Lock-Out Kit
(Hemis Only)
WARNING: Before installing the MSD Distributor, disconnect the battery cables. When disconnect-
ing the battery cables, always remove the Negative (-) cable first and install it last.
Note: The terminals of this 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.
TIMING FUNCTIONS
Before continuing with the installation, here are a few definitions you should be aware of:
Initial Timing: This is the base timing (also referred to as idle timing) of the engine before the
centrifugal advance begins.
Centrifugal Advance: The centrifugal (or mechanical) advance mechanism is made up of weights,
springs, advance cams, and an advance stop bushing. The amount and rate of advance that your
distributor is capable of is determined by the centrifugal timing. If you ever wish to lock out the
centrifugal advance, refer to the centrifugal advance section.
Total Timing: This is the total of the initial timing plus the centrifugal advance added together.
Example: 10° Initial + 25° centrifugal = 35° Total Timing. (When checking Total timing, disconnect
the vacuum canister and plug the vacuum source.)
Vacuum Advance (Hemis Only): The vacuum advance will advance the timing up to approximately
12° during partial throttle driving (with 15 lbs. of vacuum). The vacuum line should be routed to a
ported vacuum outlet above the throttle plates.
Note: MSD Distributors are supplied with the heavy (slow) advance springs installed. This is to prevent
detonation in certain applications. Review the information on pages 2-4 to determine the best advance
curve for your application.
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