msd 8972 wiring help...

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bad440

everything,all the time..
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just got the multi step retard box in the mail.no instructions.how do you wire it up? i have the dial for the module side. thanks
 
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http://www.msdignition.com/forum/showthread.php?t=275


That one has a bunch of nitrous solenoid in it, but the basics are ground the activation wires to deactivate the retard. Once the wire is energized, the retard comes in.

Go to the MSD site, search instructions for 8970. It wires the same way as the 8972.
 
Another heads up to save some scratch. You can make those adjustable retard modules for pennies compared to what MSD sells them for. They are simple potentiometers. I have the resistance levels for each degree of timing to be pulled.

Another way is to get the car running and start the retard, then start dialing up resistance and mark each degree.

I used radio shack stuff to build a 3 step out of a two step module.




Another idea for multiple retard levels
[ame]http://www.sstang.com/View.aspx?file=nino_ajustable_rpm_module.pdf[/ame]
 
Yes the mag plug from distributor goes to the retard box, then hook the retard box yellow to 6AL white. That puts the retard box in line. You don't use the mag plug on your 6AL.

Sounds like you got it.
 
just makin sure no diagram i saw showed it exactly that way.
 
well unfortunatly the car wont run with this box hooked up.acts like no spark.unplug the mag pickup line plug it back in where it was the 6 al and unplug the white wire car fires without even being inside.....called msd tech line and they said run a wire to the battery neg. and hook it to both black wires on both boxes....
 
It needs a good ground.

Does the small red wire have power?
 
yeah 12 volts same con as small red on 6albox i will move the ground and try again
 
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