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Guest Message by DevFuse

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Will an MSD ignition work in an '81 suby?

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4 replies to this topic

#1 zyewdall


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Posted 10 August 2012 - 08:34 PM

1981 GL, 4wd wagon, EA81 engine

MSD module is a 5200 -- came on a 1967 landrover that's going to disel so I don't need it there any more. I'm wondering if I could put it on the suby. We're talking about selling the '99 and using the '81 as the daily driver instead (finances.....one of the two has to go, and the '81 actually handles the winters up here better -- low range in the snow). So trying to get the stock '81 running as well as possible.


#2 maozebong


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Posted 11 August 2012 - 04:35 PM

yes. mcbrat has a diagram on how you wire it, but its really simple. i have one in my vehicle as well.

basically, you connect the factory coil wires to the red and white small gauge wires, and the orange and black wires to the coil. supply the unit with power and ground and you are done.

#3 Idasho


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Posted 11 August 2012 - 06:50 PM

Not much gain to be made, if any. All you are doing is making for a hotter spark. Thats assuming the factory coil isnt providing a hot enough spark as it is.

To get the most gain out of it, you will need to open up the gap on the plugs as well.

#4 carfreak85


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Posted 11 August 2012 - 08:06 PM

I'm pretty sure that most of the MSD boxes also have a multiple-spark event, where you get several quick sparks as opposed to one from the factory system. It only works up to like 3000rpm, but could help in some cases.

#5 AppleJuz


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Posted 15 September 2012 - 12:37 AM

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I'm not entirely sure if this is the right diagram that you are looking for (found it by searching for MSD products wiring diagrams)but I still posted as it "may" be of some use. at least that's what I think :)

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