The MSD 6 series ignitions are a great way to improve spark
efficiency in high performance street applications (high compression, NOS, turbo charging,
supercharging). The MSD 6 series ignition provides multiple sparks up to
~3000rpm on V8 applications, and a high energy spark for 20º of crank rotation
above 3000rpm. The MSD
6AL also provides a rev limiter that can be
set using plug in "chips". The 6A and 6AL generally sell for
between $100 and $160 at local performance shops and mail order places such as Summit
and Jegs.
Installation in a Mustang II ends up being pretty simple since
the battery cooling duct is in the perfect location to protect the ignition box
from heat and keep the wiring simple.
MSD Ignition hookup:
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Connect the Red wire to the Mustang II Red coil wire (+)
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Connect the White wire to the Mustang II Green coil wire (-)
-
Connect the Orange wire to the positive (+) coil terminal
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Connect the Black wire to the negative (-) coil terminal
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Connect power (large red) directly to the battery
-
Connect the ground wire to chassis ground
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MSD Tach Adapter hookup:
-
Mount the Tach Adapter between the MSD
box
and the battery.
-
Connect the white Tach Adapter wire to the Tach Output on
the MSD box.
-
Connect the red Tach Adapter wire to the red (Ignition) wire
on the MSD.
-
Connect the black Tach Adapter wire to ground
-
Cut the green tach-coil wire from the original wiring
harness
-
Connect the violet Tach Adapter wire to the green tach wire
cut in step 5
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For the ground, I used the welded in mount located directly
forward of where I mounted the MSD box. I used a short carburetor stud
that happened to have the correct threads, and connected the Tach Adapter and
MSD 6A box to the stud.
The finished product:
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