MSD 8384 Ford 351W Dual Pickup Distributor Installation - Manual (Page 3)

INSTALLATION INSTRUCTIONS 3
AUTOTRONIC CONTROLS CORPORATION • 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344
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 2 The Factory Equipped Curve.
Timing Curve From Factory
Figure 4 Advance Curves.
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