Msd 8485 VW Billet Distributor Installation- User Manual
Msd 8485 VW 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 – FACTOR; Figure 1 Ignition Timing Factors.; TIPS ON SELECTING AN ADVANCE CURVE
- Page 3 – Figure 2 Advance Curves.; CENTRIFUGAL ADVANCE CURVE; SELECTING THE ADVANCE SPRINGS; will give you the slowest
- Page 4 – SLOWEST; INSTALLING THE ADVANCE SPRINGS; degrees for the corresponding bushings.; BUSHING SIZE; Silver; Figure 4 Advance Stop Bushing Chart.
- Page 5 – CHANGING THE ADVANCE STOP BUSHINGS; Figure 5 Changing the Advance Stop Bushing.; LOCKING OUT THE CENTRIFUGAL ADVANCE; Figure 6 Locking Out the Centrifugal Advance.
- Page 6 – INSTALLING THE DISTRIBUTOR; Figure 7 Distributor Driveshaft Position.
- Page 7 – WIRING; wiring of the ignition system.; Figure 9 Wiring the Billet Distributor.; TECH NOTES
- 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
Important:
Read these instructions before attempting the installation.
Parts Included:
1- Billet Distributor
2 - #10 Disc Washers
3 - Advance Stops
1 - Retaining Nut
7 - Shims
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
MSD Billet VW Distributor
PN 8485
1 - Clamp Stud
4 - Advance Springs
1 - Hold Down Bracket
2 - O-Rings
TIMING FUNCTIONS
Before continuing with the installation, here are a few definitions you should be aware of:
Initial Timing: This is the base timing of the engine before centrifugal advance begins.
Centrifugal Advance: The centrifugal advance mechanism is made up of weights, springs, advance
cam, 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.
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) of the engine. Any factor that changes the burning rate of the fuel or the engine speed
can cause a need for an ignition timing change. Figure 1 shows some of the factors that will affect
engine timing.
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new products that you ask for! Go to www.msdperformance.com/registration.
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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 FACTOR Advance Timing Retard Timing For For Cylinder Pressure Low High RPM High Low Vacuum High Low Energy of Ignition Low High Fuel...
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 Figure 2 Advance Curves. CENTRIFUGAL ADVANCE CURVE The centrifugal advance mechanism is made up of weights, springs, an advance cam and the ...
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 SPRING COMBINATION RATE OF ADVANCE GRAPH NO. (Page 3) 2- Heavy Silver SLOWEST A 1- Heavy Silver B 1- Light Blue 1-Heavy Silver ...
