Msd 6421 6AL-2 Ignition Control Installation- Manuals

Msd 6421 6AL-2 Ignition Control Installation– User Manual in PDF format online.

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User Manual

User Manual Msd 6421 6AL-2 Ignition Control Installation

Summary

Page 2 - W W W . M S D P E R F O R M A N C E . C O M; in detail on page 5.; GENERAL INFORMATION; with a supply voltage as low as seven volts.; Solid Core

2 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 REV LIMITER This Ignition features a built-in Soft Touch Rev Control with two different rpm limits. The Soft Touch circuitry provides a smooth...

Page 3 - both; MOUNTING; Compression Spark Plug Gap

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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 Routing: Correct routing of the plug wires is also important to performance. Wires should be routed away from sharp edges and engine heat sour...

Page 4 - WIRING; GENERAL WIRING INFORMATION; Power Leads

4 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 WIRING GENERAL WIRING INFORMATION Wire Length: All of the wires of the MSD Ignition may be shortened as long as quality connectors are used or...

Page 5 - PROGRAMMING; CYLINDER SELECT; Figure 2 Adjusting the Rev Limits.; Ballast Resistor; Figure 1 Programming the Number of; Figure 2 Rev Limiter sample setting.

INSTALLATION INSTRUCTIONS 5 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 PROGRAMMING CYLINDER SELECT The MSD is programmed for operation on 8-cylinder engines. If installing the Ignition on a different style engine,...

Page 6 - PRESTART CHECK LIST; TROUBLESHOOTING; LED

6 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 2-Step Limit: This rpm limit is activated when 12 volts are applied to the Blue wire. When activated, this limit overrides the Max Limit. This...

Page 7 - Tachometer Compatibility List; AFTERMARKET TACHOMETER; NO-RUN ON FOREIGN VEHICLES; Figure 5 Wiring the Dual Ballast Resistor.

INSTALLATION INSTRUCTIONS 7 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 Tachometer Compatibility List AFTERMARKET TACHOMETER WHITE WIRE TRIGGER MAGNETIC TRIGGER CONNECTOR AUTOGAGE 8910 8920 AUTOMETER NONE NONE FORD...

Page 8 - Figure 7 Installing the Diode to a; MISSES AND INTERMITTENT PROBLEMS; Most other applications:; Figure 8 Wiring the Dual Ballast Resistor for Run-On.

8 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 from the battery, it does not require much current to keep the unit energized. If you are experiencing run- on, it is due to a small amount of...

Page 9 - CHECKING FOR SPARK; If triggering with the Magnetic Pickup:; WHITE WIRE TRIGGER

INSTALLATION INSTRUCTIONS 9 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 If everything checks positive, use the following procedure to test the ignition for spark. MSD also offers an Ignition Tester, PN 8998 or PN 8...

Page 10 - MSD SYSTEMS Installing to Points/Amplifier Style Ignition.; NOTE: On dual point setups, it is recommended; to remove the trailing set of points.; OR; MSD SYSTEMS Installing to an MSD Distributor/Crank Trigger.; NOTE: Ballast Resistor is not necessary.; connects to MSD White. The positive wire connects

10 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 MAGNETIC PICKUP (NOT USED) FROM POINTS OR ELECTRONIC IGNITION AMPLIFIER (ORIGINAL COIL - WIRE) FROM IGNITION KEY (ORIGINAL COIL + WIRE) IGNIT...

Page 11 - MSD SYSTEMS Installing to an MSD Distributor PN 8360.; MSD SYSTEMS Installing to a Hall-Effect Trigger Distributor.

INSTALLATION INSTRUCTIONS 11 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 MSD SYSTEMS Installing to an MSD Distributor PN 8360. INDICATES CONNECTION • IGNITION KEY TO 12V ORANGE WHITE RED RED BLACK ORANGE BLACK TO G...

Page 12 - MSD SYSTEMS With an MSD Timing Control (points or amplifier).; T M

12 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 MSD SYSTEMS With an MSD Timing Control (points or amplifier). TRIGGER (IF USED) OR MSD CRANK TRIGGER WHEEL DISTRIBUTOR WITH MAGNETIC PICKUP D...

Page 13 - GM IGNITIONS Wiring a Dual Connector Coil.; NOTE: If the vehicle is not equipped with a factory; tach, there will only be one white wire; PN 8876, that makes this a splice free; NOTE: MSD offers a direct plug in harness,; PN 8877, that makes this a splice free

INSTALLATION INSTRUCTIONS 13 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GM IGNITIONS Wiring a Dual Connector Coil. BOTH PINKS BOTH PINKS BOTH WHITES BOTH WHITES WHITE RED INDICATES CONNECTION RED RED MAGNETIC PICK...

Page 14 - GM IGNITIONS Wiring with an MSD Wiring Harness.; MSD SYSTEMS Wiring with an MSD Power Grid

14 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GM IGNITIONS Wiring with an MSD Wiring Harness. HARNESS PN 8877 FACTORY HARNESS (UNPLUGGED FROM COIL) COIL MAGNETIC PICKUP (NOT USED) HEAVY R...

Page 15 - GM IGNITIONS GM Large Cap HEI Distributors; of the distributor. Count the number of terminals on both ends of; NOTE: The GM Ignition Module and condenser are removed; and replaced with the supplied PN 8861 Harness.

INSTALLATION INSTRUCTIONS 15 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GM IGNITIONS GM Large Cap HEI Distributors FOUR PIN SEVEN PIN FIVE PIN There are three different large cap HEI distributors. To identify whic...

Page 16 - FORD IGNITIONS Wiring a Ford DuraSpark using White Wire Trigger.

16 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GM IGNITIONS Wiring an HEI 5 or 7-pin Module (Amplifier Trigger). *WHITE - CONNECTS TO BROWN AND TACH*RED - CONNECTS TO 12 VOLTS AND PINK *OR...

Page 18 - FORD IGNITIONS Wiring a Ford TFI with Harness, PN 8874.; NOTE: Installation of a Timing Control with the Harness, see page 15.

18 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 FORD IGNITIONS Wiring a Ford TFI with Harness, PN 8874. COIL + ORANGE BLACK MSD HARNESS PN 8874 FACTORY HARNESS (UNPLUGGED FROM COIL) MAGNETI...

Page 19 - CHRYSLER IGNITIONS Wiring a Late Model Dodge with 2-pin connector.; MSD offers two direct plug-in; HONDA IGNITIONS Wiring a Honda with Internal Coil.

INSTALLATION INSTRUCTIONS 19 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 CHRYSLER IGNITIONS Wiring a Late Model Dodge with 2-pin connector. BLACK/GRAY OR GRAY GREEN/ ORANGE MAGNETIC PICKUP (NOT USED) FROM IGNITION ...

Page 20 - HONDA IGNITIONS Wiring a Honda with a Blaster Coil and Power Cap.; MSD offers a Power Cap to convert your; HONDA IGNITIONS Wiring a Factory External Coil Honda/Acura.

20 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 HONDA IGNITIONS Wiring a Honda with a Blaster Coil and Power Cap. IGNITION 12 VOLTS BLACK/YELLOW WIRE ORIGINAL COIL TRIGGER WIRE WHITE/BLUE W...

Page 21 - Wiring a Toyota with a Tach Adapt PN 8910HEI.; The negative wire connects to MSD

INSTALLATION INSTRUCTIONS 21 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 AFTERMARKET COMPONENTS Wiring a Mallory Unilite or 9000 Series using Points Trigger. RED RED IGNITION KEY TO 12V TO GROUND WHITE GREEN BROWN ...

Page 22 - AFTERMARKET COMPONENTS Wiring to a Pertronix Ignitor Kit.

22 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 AFTERMARKET COMPONENTS Wiring a Mallory 9000 Series using Magnetic Pickup. FROM IGNITION KEY (ORIGINAL COIL + WIRE) BLK/ORANGE BLK/GREEN MALL...

Page 23 - WIRING ATOMIC WITH PN 6421

INSTALLATION INSTRUCTIONS 23 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GREEN (-) VIOLET (+) ECT SENSOR WHITE ORANGE TO AC INPUT YELLOW NOT USED MAG PICKUP NOT USED Orange (+) and Black (-) are the only wires that...

Page 24 - WIRING ATOMIC WITH PN 6421 TO USE WITH TIMING CONTROL

24 INSTALLATION INSTRUCTIONS 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 GREEN (-) VIOLET (+) ECT SENSOR WHITE NOT USED ORANGE TO AC INPUT YELLOW MAG PICKUP Orange (+) and Black (-) are the only wires that connect ...

Page 25 - TECH NOTES

INSTALLATION INSTRUCTIONS 25 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 5 - 7 1 2 3 • F A X ( 9 1 5 ) 8 5 7 - 3 3 4 4 TECH NOTES _________________________________________________________________________________________________________________________ ________...

Page 28 - INSTALLATION INSTRUCTIONS; Limited Warranty; or consequential damages.; Service; When returning MSD components for warranty service,; Proof of Purchase; must be supplied for verification. After; M S D; Revised

28 INSTALLATION INSTRUCTIONS Limited Warranty M SD warrants this product to be free from defects in material and workmanship under its intended normal use*, when properly installed and purchased from an authorized MSD dealer, for a period of one year from the date of the original purchase. This warr...