Msd 8365 GM HEI Billet Distributor Installation- User Manual
Msd 8365 GM HEI Billet Distributor Installation– User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – CHOOSING AN ADVANCE CURVE; FACTOR; Figure 1 Ignition Timing Factors.; TIPS ON SELECTING AN ADVANCE CURVE
- Page 3 – CENTRIFUGAL ADVANCE CURVE; SELECTING THE ADVANCE SPRINGS; Figure 4 Advance Curves.; Timing Curve From Factory; Figure 3 Spring Combination Chart.
- Page 4 – Note: If you want to lock out the vacuum advance; Figure 6 Locking Out the Centrifugal Advance.; BUSHING SIZE; Silver
- Page 5 – only be used if; Figure 8 Marking the Rotor Location.; INSTALLING THE DISTRIBUTOR; Figure 9 Modified Block for use with O-Rings.
- Page 6 – Figure 11 Wiring to an MSD Ignition Control.
- Page 7 – VACUUM ADVANCE LOCKOUT; Note: Do not forget to plug the original vacuum; VACUUM ADVANCE ADJUSTMENT; Figure 13 Vacuum Lockout Installed.; TACHOMETER INFORMATION; No Rev Limit: To disable the rev limit function, cut and remove the; PROGRAMMING THE REV LIMIT; Figure 14 Disable the Rev Limit.
- Page 8 – Limited Warranty; or consequential damages.; Service; When returning MSD components for warranty service,; Proof of Purchase must be supplied for verification. After; All returns must have a Return Material Authorization (RMA) number; issued to them before; M S D; REV LIMITER VERIFICATION
MSD Pro-Billet Chevrolet HEI Distributor
PN 8365
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.
ONLINE PRODUCT REGISTRATION: Register your MSD product online and you’ll be entered
in our monthly 8.5mm Super Conductor Spark Plug Wire give-away! Registering your product
will help if there is ever a warranty issue with your product and helps the MSD R&D team create
new products that you ask for! Go to www.msdperformance.com/registration.
Important:
Read these instructions before attempting the installation.
Parts Included:
1 - Pro-Billet Distributor, PN 8365
1 - Rotor, PN 84101
1 - Distributor Cap, PN 84111
1 - Coil Cover, PN 84022
1 - Digital HEAT Module, PN 83647
1 - Coil, PN 8225
1 - Advance Kit
1 - Gasket
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 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.
Note: MSD Distributors are supplied with the heavy (slow) advance springs and the 21° stop bushing
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.
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: The vacuum advance will advance the timing up to 10° during partial throttle
driving (with 15 lbs of vacuum). The vacuum line should be routed to a ported vacuum outlet above
the throttle plates.
RPM LIMIT AND TACHOMETER INFORMATION
Tach Signal: The Pro-Billet HEI Distributor features a Gray Tach Output wire which provides a clean signal
for most tachometers and even some aftermarket fuel injection systems. The signal output
is a 12 volt square wave, 20° duty cycle. This wire is also responsible for programming the
built-in rev limiter.
1 - Tube of Gear Lubricant
1 - Vacuum Advance Lock-Out
2 - O-rings
1 - HEI Connector
2 - HEI Wiring Terminals
1 - HEI/Tach Connector
1 - Vacuum Advance Adjusting Kit
1 - Gray Tach Wire
M S D
• W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4
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Summary
2 INSTALLATION INSTRUCTIONS M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 CHOOSING AN ADVANCE CURVE The function of the advance curve is to match the ignition timing to the burning rate of the fuel and speed (rpm) ...
INSTALLATION INSTRUCTIONS 3 M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 CENTRIFUGAL ADVANCE CURVE SELECTING THE ADVANCE SPRINGS The rate, or how quick the advance comes in is determined by the type of springs whi...
4 INSTALLATION INSTRUCTIONS M S D • W W W . M S D P E R F O R M A N C E . C O M • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 SELECTING THE ADVANCE STOP BUSHING Three different advance stop bushings are supplied in the distributor kit. The distributor comes with a B...
