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INSTALLATION  INSTRUCTIONS 1

 

Parts Included:

  1 - MSD Ignition

  1 - Harness, PN 8860

  

OPERATION AND FEATURES

DIGITAL OPERATION

The Digital 6A and 6AL use a high speed RISC microcontroller to control the ignition's output while 

constantly analyzing the various inputs such as supply voltage, trigger signals and rpm. The high 

speed controller can make extremely quick compensations to the output voltage, multiple spark 

series, timing and rpm limits while maintaining precise timing and accurate rev limiting. The circuits 

and controller of the MSD have been thoroughly filtered to create protection against Electro Magnetic 

Interference (EMI). 

CAPACITIVE DISCHARGE

The Digital 6A and 6AL feature a capacitive discharge ignition design. The majority of stock ignition 

systems are inductive ignitions. In an inductive ignition, the coil must store and step up the voltage 

to maximum strength in between each firing. At higher rpm, since there is less time to charge the coil 

to full capacity, the voltage falls short of reaching maximum energy which results in a loss of power 

or top end miss.
The MSD Ignition features a capacitor which is quickly charged with 520 - 535 volts and stores it until 

the ignition is triggered. With the CD design, the voltage sent to the coil positive terminal is always 

at full power even at high rpm. 

MULTIPLE SPARKS

The MSD produces full power multiple sparks for each firing of a plug. The number of multiple sparks 

that occur decreases as rpm increases, however the spark series always lasts for 20° of crankshaft 

rotation. Above 3,000 rpm there is simply not enough “time” to fire the spark plug more than once, 

so there is only one powerful spark. 

PROTECTION

The Digital 6A and 6AL have a built in reverse polarity protection circuit. This will protect the ignition 

in the event of wrong connections.

MSD Digital 6A and 6AL Ignition Control

6A - PN 6201/62013, 6AL - PN 6425/64253

1 - Main Harness

1 - Parts Bag

 

WARNING:

  During installation, disconnect the battery cables. When disconnecting the battery always 

remove the Negative cable first and install it last.

  6AL ONLY

  4 - Vibration Mounts

  1 - Screwdriver 

       

  

 

Note: 

The Carb label supplied is required to aid in passing the California Smog Check program. This label 

must be installed in an underhood location that is readily visible. 

Note:

 If you're triggering an aftermarket EFI system with the Gray wire of the MSD, see page 5 to 

deactivate the tach verification feature. 

Important:

 When installing a Digital Series Ignition, timing will be affected, reset to your engine's 

specifications.

ONLINE PRODUCT REGISTRATION: Register your MSD product online. Registering your product 

will help if there is ever a warranty issue with your product and helps the MSD R&D team create 

new products that you ask for! Go to www.msdperformance.com/registration.

Содержание 6A 6201

Страница 1: ...o the coil positive terminal is always at full power even at high rpm MULTIPLE SPARKS The MSD produces full power multiple sparks for each firing of a plug The number of multiple sparks that occur dec...

Страница 2: ...ogram the Ignition This is easily achieved through the cylinder select wire loops on the side of the ignition Page 5 outlines setting the cylinder select GENERAL INFORMATION BATTERY The Digital 6A and...

Страница 3: ...p is exactly right for your application It is recommended to follow the engine builder or manufacturer s specification for spark plugs With that you can then experiment with the plug gap to obtain the...

Страница 4: ...its that can be used to trigger the MSD Ignition a Points circuit the White wire and a Magnetic Pickup circuit the Green and Violet wires Only one circuit will be used at a time This wire is used to c...

Страница 5: ...be running as you make adjustments to the rev limiter function REV LIMITER VERIFICATION The MSD Digital 6AL has an optional built in Rev Limiter Verification feature When the key is in the On position...

Страница 6: ...battery positive and negative terminals The battery is connected and fully charged if not using an alternator The engine is equipped with at least one ground strap to the chassis If you are installing...

Страница 7: ...igger and you are using the White wire to trigger the MSD you will need the PN 8910 BALLAST RESISTOR If you have a current trigger tach originally coil positive and use the White wire of the MSD you c...

Страница 8: ...llest wire exiting the alternator Figure 7 It is usually a Brown wire SMALLER OF THE 2 WIRES DIODE WIRE LOOM GM 2 WIRE ALTERNATORS Figure 7 Installing the Diode to a 1973 1983 GM Vehicle 1A 100V DIODE...

Страница 9: ...e ignition is working properly If there is no spark skip to step 6 If triggering with the Magnetic Pickup 1 Make sure the ignition switch is in the Off position 2 Remove the coil wire from the distrib...

Страница 10: ...s it is recommended to remove the trailing set of points MSD SYSTEMS Installing to an MSD Distributor Crank Trigger NOTE Ballast Resistor is not necessary NOTE Remove the coil terminal wires The negat...

Страница 11: ...T USED GRAY TACH OUTPUT GREEN VIOLET DIGITAL 6AL REV LIMITER MSD SYSTEMS With an MSD Timing Control points or amplifier MOST TIMING CONTROLS TIMING CONTROL UNIT CONTROL KNOB IGNITION TM MAGNETIC PICKU...

Страница 12: ...il connector is labeledA B C The wire in the A port is positive pink The wires in B and C are coil negative wires color will vary by application BOTH PINKS BOTH WHITES BOTH WHITES FACTORY HARNESS CUT...

Страница 13: ...TIONS GM Large Cap HEI Distributors FOUR PIN SEVEN PIN FIVE PIN There are three different large cap HEI distributors To identify which of the following diagrams fit your specific application remove th...

Страница 14: ...ND C NOTE Some 5 pin models may experience a hesitation or stall on deceleration If this occurs contactMSDTechLine fortherequiredbolt indiodeto correcttheproblem MSDTech Line 915 855 7123 GM IGNITIONS...

Страница 15: ...AL REV LIMITER FORD IGNITIONS Wiring a Ford DuraSpark using Magnetic Pickup Trigger NOT USED FORD DISTRIBUTOR VIOLET ORANGE VIOLET BLACK NOT USED DISTRIBUTOR CONNECTOR DISCONNECT FROM ORIGINAL HARNESS...

Страница 16: ...EEN INDICATES CONNECTION NOT USED COVER WITH TAPE ORANGE BLACK GRAY TACH OUTPUT RED WHITE HARNESS MAGNETIC PICKUP CONNECTOR GREEN VIOLET DIGITAL 6AL REV LIMITER FORD IGNITIONS Wiring a Ford TFI with H...

Страница 17: ...OLET INDICATES CONNECTION DIGITAL 6AL REV LIMITER NOTE Original wiring must be cut MSD offers two direct plug in harnesses PN 8889 for 90 97 and PN 8884 for 98 03 DUAL MAGNETIC PICKUP DISTRIBUTOR TO D...

Страница 18: ...IC PICKUP NOT USED GRAY TACH OUTPUT GREEN VIOLET DIGITAL 6AL REV LIMITER Wiring a Toyota with a Tach Adapt PN 8910HEI GENERAL IMPORT WIRING ORANGE TO COIL BLACK TO COIL INDICATES CONNECTION MAGNETIC P...

Страница 19: ...HARNESS VIOLET VIOLET ORANGE BLACK GRAY TACH OUTPUT RED WHITE FROM IGNITION KEY ORIGINAL COIL WIRE DIGITAL 6AL REV LIMITER AFTERMARKET COMPONENTS Wiring to a Pertronix Ignitor Kit If you did not find...

Страница 20: ...possible using Ground shipping methods ground shipping is covered by warranty For more information call MSD at 915 855 7123 MSD technicians are available from 7 00 a m to 5 00 p m Monday Friday mount...

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