MSD 8485 VW 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
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.