MSD 8572 Corvette V8 Tach DriveDistributor w_Vacuum Advance Installation - Manual (Page 3)

INSTALLATION INSTRUCTIONS 
M S D I G N I T I O N
• w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA 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 which
are installed on the distributor. The MSD
distributors are equipped with two Heavy
Silver springs installed. These will give you
the slowest advance curve possible (Figure
2). The parts kit contains two additional sets
of springs which can be used to match the
advance curve to your particular application.
Refer to the Spring Combination Chart
(Figure 3) for combinations that can be
achieved.
To change the springs, remove the cap and
rotor and use needlenose pliers to remove
the springs. Be sure the new springs seat
in the groove on the pin.
Figure 4 Advance Curves.
Figure 2 The Factory Equipped Curve.
Timing Curve From Factory
Figure 3 Spring Combination Chart.
SPRING COMBINATION RATE OF ADVANCE FIGURE 4
2- Heavy Silver
SLOWEST A
1- Heavy Silver B
1- Light Blue
1-Heavy Silver
C
1-Light Silver
2- Light Blue
D
1- Light Silver E
1- Light Blue
2- Light Silver
FASTEST F