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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 7 - 5 2 0 0   •   F A X   ( 9 1 5 )   8 5 7 - 3 3 4 4

ROUTING WIRES

The MSD wires should be routed away from direct heat sources such as exhaust manifolds and 

headers and any sharp edges. The trigger wires should be routed separate from the other wires 

and spark plug wires. It is best if they are routed along a ground plane such as the block or firewall 

which creates an electrical shield. The magnetic pickup wires should always be routed separately 

and  should  be  twisted  together  to  help  reduce  extraneous  interference  (the  harness  supplied  is 

already twisted).

The chart shows the polarity of other common magnetic pickups. If using a different magnetic pickup, 

use the MSD 2-Pin connector, available as PN 8824, for a direct plug-in installation.

WARNING:  The  MSD-8-Series  Ignitions  are  capacitive 

discharge  ignitions.  High  voltage  is  present 

at  the  coil  primary  terminals.  Do  not  touch 

the  coil  or  connect  test  equipment  to  the 

terminals.

PRESTART CHECK LIST

• The only wires connected to the coil terminals are the MSD 

Orange to coil positive and Black to coil negative.

• The small Red wire of the MSD is connected to a switched 

12 volt source.

• The MSD power leads are connected directly to the 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.

TROUBLESHOOTING

Every MSD Ignition undergoes numerous quality control checks including a four hour burn-in test. 

If you experience a problem with your MSD, our research has shown that the majority of problems 

are due to improper installation or poor connections. 

The  Troubleshooting  section  has  several  checks  and  tests  you  can  perform  to  ensure  proper 

installation and operation of the MSD. If you have any questions concerning your MSD, call our 

Customer Support Department at (915) 855-7123, 7 - 6 mountain time.

MISSES AND INTERMITTENT PROBLEMS

Experience at the races has shown that if your engine is experiencing a miss or hesitation at higher 

rpm,  it  is  usually  not  directly  ignition  related.  Most  probable  causes  include  a  coil  or  plug  wire 

failure, arcing from the cap or boot plug to ground or spark ionization inside the cap. Several items 

to inspect are:

•  Always inspect the plug wires at the cap and at the plug for a tight connection and visually 

inspect for cuts, abrasions or burns.

•  Inspect the Primary Coil Wire connections. Because the MSD is a Capacitive Discharge 

ignition  and  it  receives  a  direct  12  volt  source  from  the  battery,  there  will  not  be  any 

voltage at the Coil Positive (+) terminal even with the key turned On. During cranking 

or while the engine is running, very high voltage will be present and no test equipment 

should be connected.

•  Make sure that the battery is fully charged and the connections are clean and tight. If you 

are not running an alternator this is an imperative check. If the battery voltage falls below 

10 volts during a race, the MSD output voltage will drop.

Common Mag Pickup Wires

Distributor

Colors

Mag+

Mag-

MSD

Org/Blk

Vio/Blk

MSD Crank Trigger

Org/Blk

Vio/Blk

Ford

Orange

Purple

Accel

46/48000

 Series

Org/Blk

Vio/Blk

Accel

51/61000

 Series

Red

Black

Chrysler

Org/Wht

Black

Mallory

Org/Blk

Vio/Blk

Figure 4 Common Mag Pickup Wires.

Содержание MSD-8 Plus

Страница 1: ...tems Note that when using a single coil both coil positive wires must be connected to the coil RPM LIMITERS The MSD 8 Plus Ignition is equipped with a 2 Step Rev Control The Ignition will accept two rpm modules so two different rev limits can be set One rev limit can be used for over rev protection while the second limit can be activated on the starting line for a lower rpm limit to assist in stag...

Страница 2: ...ht or other add on rpm activated devices The Tach Output Terminal produces a 12 volt square wave signal with a 20 duty cycle SPARK PLUGS AND WIRES Spark plug wires are very important to the operation of your ignition system A good quality helically wound wire and proper routing are required to get the best performance from your ignition such as the MSD Heli Core or 8 5mm Super Conductor Note Solid...

Страница 3: ... only wire that makes electrical contact with the coil negative terminal COIL 2 HEAVY BLACK This wire connects to a good ground either at the battery negative terminal or to the engine BAT HEAVY RED GRAY BAT TACH TACH 2 STEP IGNITION Connects to a switched 12 volt source Such as the ignition key or switch RED WHITE This wire is used to connect to the points electronic ignition amplifier output or ...

Страница 4: ...If you experience a problem with your MSD our research has shown that the majority of problems are due to improper installation or poor connections The Troubleshooting section has several checks and tests you can perform to ensure proper installation and operation of the MSD If you have any questions concerning your MSD call our Customer Support Department at 915 855 7123 7 6 mountain time MISSES ...

Страница 5: ...in the Off position 2 Remove the coil wire from the distributor cap and set the terminal approximately 1 2 from ground 3 Disconnect the MSD White wire from the distributor s points or ignition amplifier 4 Turn the ignition to the On position Do not crank the engine 5 Rapidly tap the White wire to ground several times the first 3 4 times will not spark When the wire is pulled from ground a spark sh...

Страница 6: ...shes check for a coil problem The following wiring diagrams illustrate numerous installations on different vehicles and applications If you experience difficulties when installing your MSD contact our Customer Support Department at 915 855 7123 7 6 Mountain time or e mail us at msdtech msdignition com COIL TERMINALS MSD supplies heavy duty nickel plated terminals for the connections There is also ...

Страница 7: ... TO BATTERY NEGATIVE HEAVY RED TO BATTERY POSITIVE BLUE GRAY MSD SYSTEMS With an MSD Timing Control COIL 1 COIL 1 COIL 2 COIL 2 TO SWITCHED 12 VOLTS PN 8261 PN 8261 BLACK ORANGE BLACK ORANGE TO CHASSIS HEAVY BLACK TO BATTERY NEGATIVE HEAVY RED TO BATTERY POSITIVE BLUE GRAY NOTE WHEN USING A SINGLE COIL BOTH COIL POSITIVE TERMINALS MUST BE CONNECTED TO THE COIL EITHER CONNECT BOTH ORANGE WIRES TO T...

Страница 8: ...n lieu of all other warranties or representation whether expressed or implied including any implied warranty of merchantability or fitness In no event shall MSD or its suppliers be liable for special or consequential damages Intended normal use means that this item is being used as was originally intended and for the original application as sold by MSD Any modifications to this item or if it is us...

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