Barracuda Challenger Forum

Author Topic: Help MSD 6AL install and tach  (Read 131 times)

Offline 351c4v71

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Help MSD 6AL install and tach
« on: July 26, 2017 - 02:32:41 pm »
Hi guys,
In the midst of installing an MSD 6AL on my 71 440-6 cuda clone.
3 issues
#1 - 2 brown wires are coming in on my resistor and 2 (solid blue and striped blue+yellow) on the other side. I understand that the striped yellow and blue goes to the orange box which I no longer need and is discarded. The solid blue needs to be tied to the brown (dispose of the resistor) and the MSD small red wire. Why is there 2 brown wires?
#2 - On my coil, there's a brown wire on one side and a blakc striped yellow and a black striped grey on the other. MSD has 2 wires going to the coil. What is this 3rd wire I have?
#3 - Where can I find the tach wire going to my original tach? is it that extra wire going to my coil?
Thanks!
JS
Montreal, Canada




Offline TelisSE440

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Re: Help MSD 6AL install and tach
« Reply #1 on: July 27, 2017 - 08:30:49 am »
I will go a little opposite, if you don't mind

#3 Yes that extra grey wire goes to the tach. But for the MSD6AL you will have to connect the tach wire to a female provision, which is located opposite of the box's wiring.

#2 The orange wire goes in the brown wire's position (positive +) and the black goes in the black striped yellow wire's position (negative-). I may be wrong but i thought that the brown wire should be a dark blue but anyway.

#1 There are two brown wires because the one has power when engine is in START position (meaning you turn the starter, not ON position) and the other is the wire that goes to the ignition coil.

Off topic, in my car i deleted the ballast resistor and connected the wires alltogether.

Offline 351c4v71

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Re: Help MSD 6AL install and tach
« Reply #2 on: July 27, 2017 - 08:36:45 am »
Thanks


Offline TelisSE440

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Re: Help MSD 6AL install and tach
« Reply #3 on: July 27, 2017 - 08:51:34 am »
 :thumbsup: Very nice cuda BTW (saw it on youtube)

Offline Tazinhawaii

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Re: Help MSD 6AL install and tach
« Reply #4 on: July 27, 2017 - 03:26:23 pm »
I just did this on my car.  Did you get the tach adapter?  I changed to the MSD distributor as well, so my wiring was different.  But I believe the tach adapter is required for our dash tachs to work.
1971 Cuda 440 six pack.  Original TX9 Black on Black.  Located in southern NH.

Offline 70chall440

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Re: Help MSD 6AL install and tach
« Reply #5 on: July 27, 2017 - 04:07:45 pm »
I just did this on my car.  Did you get the tach adapter?  I changed to the MSD distributor as well, so my wiring was different.  But I believe the tach adapter is required for our dash tachs to work.

Correct, I went through this with my Challenger as I have a MSD Dual Sync distributor.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline javakm70cuda

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Re: Help MSD 6AL install and tach
« Reply #6 on: July 31, 2017 - 03:15:21 pm »
 Just did this on my car also. I required tach adapter to make the original tach work in car

 MSD Ignition 8920 Magnetic Pickup Tachometer Adapter


 Off topic, in my car i deleted the ballast resistor and connected the wires alltogether. :iagree:


Offline 70chall440

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Re: Help MSD 6AL install and tach
« Reply #7 on: July 31, 2017 - 11:15:38 pm »
Just did this on my car also. I required tach adapter to make the original tach work in car

 MSD Ignition 8920 Magnetic Pickup Tachometer Adapter


 Off topic, in my car i deleted the ballast resistor and connected the wires alltogether. :iagree:

I agree on both issues, however I am running a Dual Sync distributor as well as the 6AL. Not sure that matters.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)