INSTALLATION INSTRUCTIONS
3
AUTOTRONIC CONTROLS CORPORATION
• 1490 HENRY BRENNAN DR., EL PASO, TEXAS 79936 • (915) 857-5200 • FAX (915) 857-3344
Figure 2 Advance Curves.
CENTRIFUGAL ADVANCE CURVE
The centrifugal advance mechanism is made up of weights, springs, an advance
cam and the advance stop bushing. The distributor can be used in a wide selection
of applications by changing only the springs and the advance stop bushing. There
is no need to change the weights or advance cam.
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. 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.
