User manual MSD IGNITION PN 400 PN 8387 MSD PRO-BILLET READY-TO-RUN CHRYSLER V8 DISTRIBUTOR

[. . . ] The amount and rate of advance that your distributor is capable of is determined by the centrifugal timing. If you ever wish to lock out the centrifugal advance, refer to the centrifugal advance section. Total Timing: This is the total of the initial timing plus the centrifugal advance added together. Example: 10° Initial + 25° centrifugal = 35° Total Timing. [. . . ] · The starting point of the centrifugal advance curve is controlled by the installed length and tension of the spring. · How quickly the centrifugal advance (slope) comes in is controlled by the spring stiffness. The bigger the bushing, the smaller the amount of advance. AUTOTRONIC CONTROLS CORPORATION · 1490 HENRY BRENNAN DR. , EL PASO, TEXAS 79936 · (915) 857-5200 · FAX (915) 857-3344 INSTALLATION INSTRUCTIONS 3 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. 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. Timing Curve From Factory SPRING COMBINATION 2- Heavy Silver 1- Heavy Silver 1- Light Blue 1-Heavy Silver 1-Light Silver 2- Light Blue 1- Light Silver 1- Light Blue 2- Light Silver RATE OF ADVANCE SLOWEST FIGURE 4 (Page 3) A B C D E FASTEST F Figure 2 The Factory Equipped Curve. Figure 3 Spring Combination Chart. Figure 4 Advance Curves. AUTOTRONIC CONTROLS CORPORATION · 1490 HENRY BRENNAN DR. , EL PASO, TEXAS 79936 · (915) 857-5200 · FAX (915) 857-3344 4 INSTALLATION INSTRUCTIONS SELECTING THE ADVANCE STOP BUSHING Three different advance stop bushings are supplied in the distributor kit. The distributor comes with a Blue (21°) bushing already installed. If a different amount of centrifugal advance is desired, follow the next procedure to change the bushings. The chart in Figure 5 gives the size and approximate degrees for the corresponding bushings. BUSHING DIAMETER Red - 0. 283" Silver - 0. 313" Blue - 0. 343" Black - 0. 375" APPROXIMATE CRANKSHAFT DEGREES 28° 25° 21° 18° Figure 5 Advance Stop Bushing Chart. CHANGING THE ADVANCE STOP BUSHINGS 1. Remove the locknut and washer on the bottom of the advance assembly (Figure 6). Install the washer and locknut. Figure 6 Changing the Advance Stop Bushing. LOCKING OUT THE CENTRIFUGAL ADVANCE 1. Remove the advance springs, weights and the advance stop bushing from the advance assembly. Remove the roll-pin from the shaft and slide the retaining sleeve down (Figure 7). Slide the shaft two inches out of the housing. Figure 7 Removing the Retaining Sleeve. AUTOTRONIC CONTROLS CORPORATION · 1490 HENRY BRENNAN DR. , EL PASO, TEXAS 79936 · (915) 857-5200 · FAX (915) 857-3344 INSTALLATION INSTRUCTIONS 5 5. Rotate the shaft 180° and insert the advance stop bushing pin into the small hole on the advance plate (Figure 8). Install the retaining sleeve and roll-pin. Figure 8 Locking Out the Centrifugal Advance. INSTALLING THE DISTRIBUTOR 1. [. . . ] For more information, call the MSD Customer Service Line (915) 855-7123. Monday - Friday (mountain time). Limited Warranty Controls Corporation warrants MSD Ignition products to be free from defects in material and workmanship under normal use and if properly installed for a period of one year from date of purchase. If found to be defective as mentioned above, it will be replaced or repaired if returned prepaid along with proof of date of purchase. This shall constitute the sole remedy of the purchaser and the sole liability of Autotronic Controls Corporation. [. . . ]