MSD SCI Series

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2 INSTALLATION INSTRUCTIONS GENERAL INFORMATION BATTERY TERY An MSD SCI Series Ignition will operate on any negative ground, 12 volt electrical system with a distributor. The MSD can be used with a 16 volt battery and can withstand a momentary 24 volts in case of a jump start. The ignition will deliver full voltage with a supply of 9 - 18 volts and will operate with a supply voltage as low as 5 volts. If your application does not use an alternator, allow at least 15 amp/hour for every half hour of operation. If the engine is cranked with the same battery or other accessories such as an electric fuel pump, fan or water pump are used, the amp/hour rating must be increased. COILS The MSD Sport Compact Ignition can be used with most stock coils and aftermarket coils that are designed to replace the stock coils. There are some “race only” coils such as the MSD Pro Power Coil, PN 8201, that cannot be used with the SCI Series Ignition. For more information on recommended coils, consult the supplied Coil Application Chart or check with the manufacturer of the coil. If you have any questions concerning coils, contact our MSD Customer Service Department at (915) 855-7123. TACHOMETERS/FUEL INJECTION The MSD SCI Series Ignitions feature a Tach Output Terminal on the side of the unit. This terminal provides a trigger signal for tachometers, fuel injection, a shift light or other add-on devices that require a 12 volt square wave rpm signal with a 20% duty cycle. Some vehicles with factory tachometers may require a Tach Adapter to operate with the MSD. For more information on tachometers and MSD Tach Adapters, refer to the Tachometer Section on page 6. SPARK PLUGS AND WIRES Spark plug wires are very important to the operation of the SCI Series Ignition. A good quality, helically wound wire and proper routing are required to obtain the best performance from the SCI ignition. MSD recommends using a helically wound suppression type wire such as the MSD 8mm Heli-Core or 8.5mm Super Conductor Spark Plug Wire. This type of wire provides a good path for the spark to follow while keeping Electro Magnetic Interference (EMI) to a minimum. Excessive EMI, such as the amount that is produced by solid core spark plug wires, will interfere with the operation of the MSD. Note: Solid Core spark plug wires cannot be used with any MSD Ignition products. Routing: Correct routing of the plug wires is also important to performance. Wires should be routed away from sharp edges and engine heat sources. If there are two wires that are next to each other, the wires should be routed away from each other to avoid inducing a spark into the other wire. To add more heat protection to the wires, MSD offers Pro Heat Guard, PN 3411. This is a glass woven and silicone coated protective sleeve that can be slid over the plug wires. For extra protection of the spark plug boots, MSD also offers Pro-Heat Boot Guard, PN 3412. Spark Plugs: Choosing the correct spark plug design and heat range is important when trying to get the best performance possible. Since there are so many engine combinations and manufacturers, MSD does not recommend which plug or gap is exactly right for your application. MSD suggests that you follow the engine builder or manufacturer’s specification for spark plugs. With that, you can then experiment with the plug gap to obtain the best performance. The gap of the plugs can be opened in 0.005” increments, then tested until the best performance is obtained. These examples are just starting points to get you headed in the right direction. Every application is different and should be tested and tuned. AUTOTRONIC CONTROLS CORPORATION • 12120 1490 HENRY ESTHER LAMA, BRENNAN SUITE DR., 114, EL EL PASO, TEXAS 79936 ••(915) 857-5200 • FAX (915) 857-3344
INSTALLATION INSTRUCTIONS 3 Sealing: Do not attempt to seal the MSD. All circuits of an MSD receive a thick conformal coating of Humi-Seal. This sealant protects the electronics from moisture. If you were to seal the unit, any moisture or water that may seep in through the wiring grommets will not be able to drain and may result in corrosion. Welding: If you plan on welding on your vehicle, to avoid possible damage to the ignition, always disconnect both the MSD Heavy Power cables from the battery. It is also recommended that the tach ground wire be disconnected. Distributor Cap and Rotor: It is recommended to install a new distributor cap and rotor when installing the Sport Compact Ignition. The cap should be clean inside and out especially the terminals and the rotor tip. On vehicles which use a small diameter cap, it is possible for the air inside the cap to become electrically charged causing crossfire which may result in misfire. This can be prevented by drilling a couple of vent holes in the cap. The holes should be placed between the terminals, at rotor height and away from any metal surfaces. If your environment demands it, place a small piece of screen over the hole to act as a filter. Initial Spark: It is normal, yet not very common, for the MSD to produce a spark when the ignition key is turned On. This is due to the capacitor being charged and the distributor pickup being in the correct position to trigger the ignition to fire. This could also occur when installing the positive battery cable. CYLINDER SELECT The Soft Touch Rev Limiter that is built into the MSD SCI-L is programmed for operation on an 8-cylinder engine. If you are installing one of these units on a 4 or 6-cylinder evenfire engine, the ignition must be modified. This is easily achieved through the cylinder select device on the side of the ignition. To program the ignition: 1. Locate and remove the round black cover with a single Phillips screw. 2. There are two wire loops, a Red and Blue loop. Refer to the chart in Figure 1 to determine which loop to cut for your application. 3. After cutting the loop(s), turn the wire ends away from each other so they cannot come into contact. Install the cover and the screw. Figure 1 Cylinder Select Loops. MOUNTING The MSD Ignition may be mounted in any location except on the engine or near the exhaust manifold. Excessive heat at these locations may cause damage to the ignition. It can be mounted in most positions, except directly upside down (if upside down, moisture or water cannot escape). It is not recommended to mount the unit in an enclosed area such as the glovebox. When selecting a mounting location, make sure the cable harness will reach the battery and coil/ distributor assembly. When a suitable location is found, hold the ignition in place and mark the location of the mounting holes. Using a 1/8” drill bit, drill a hole in each of the locations marked. Use the supplied self tapping screws to mount the ignition unit. AUTOTRONIC CONTROLS CORPORATION • 12120 1490 HENRY ESTHER BRENNAN LAMA, SUITE DR., 114, EL EL PASO, TEXAS 79936 • •(915) 857-5200 •• FAX FAX (915) 857-3344
Page 1: MSD SCI Series PN 6300 & PN 6320 IM
Page 5 and 6: INSTALLATION INSTRUCTIONS 5 Figure
Page 7 and 8: INSTALLATION INSTRUCTIONS 7 MISSES
Page 9 and 10: INSTALLATION INSTRUCTIONS 9 ACURA I
Page 11 and 12: INSTALLATION INSTRUCTIONS 11 HONDA

MSD SCI Series

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