PN8517 Datasheet, PDF (1/8 Pages) Mallory performance club – MSD Pro-Billet V8 Distributor

MSD Pro-Billet V8 Distributor
Buick 400, 430, 455, PN 8517
Buick 215, 300, 340, 350, PN 8548
Oldsmobile, PN 8566
Pontiac, PN 8563
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Important:  Read these instructions before attempting the installation.
Note: An MSD Ignition is required with this Distributor.
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 - Gasket (Pontiac, Olds Only)
1 - Tube of Gear Lubricant
1 - O-Ring (Buick 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 Cap 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.
Note: If you prefer the GM socket style cap, MSD offers one as PN 8437.
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.
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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