MSD 84891 Chevy Flat Top Pro-Billet Distributor Installation - Manual (Page 3)

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
Figure 2 The Factory Equipped Curve.
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
Timing Curve From Factory
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.