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Unread 07-19-2008   #1 (permalink)
dragonride is offline Made Member

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Default Exactly what does an MSD ignition box do?

I just installed a MSD ignition box, model 6A that I got off a buddy who had it for his car but then sold the car. I ran the car around the block and really dont see much of a difference other than it idles a bit better, even though at first when at idle and I gave it some gas it sputtered a bit then caught itself. So what are the advantages, disadvantages of installing this? Car is an 1988 GT, basically stock. Thanks.
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Unread 07-19-2008   #2 (permalink)
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Basically it increases the ignition voltage of the spark. Multiple Spark Discharge. If I remember right, under 3K rpm's the spark plug ignites 3 times at each fire, above 3K rpm's it jumps up the voltage so there is a hotter spark. Too bad it wasn't a 6AL, you would have had an adjustable rev limiter.

In theory, it should ensure a more complete combustion burn, increasing fuel efficiency, increase power, reduce misfire, etc.
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Unread 07-19-2008   #3 (permalink)
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it's better because the secondary spark is stronger than stocks almost non existent and therefore gives you a more complete burn
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Unread 07-19-2008   #4 (permalink)
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thanks guys, you just explained a lot
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Unread 07-20-2008   #5 (permalink)
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Actually, it's 6 sparks for every 20 degrees of crank rotation when a given cylinder is on the power stroke, as opposed to 1 for the stock ignition. It'll give better starting, smoother engine acceleration, and a more complete burn of the air fuel mix. It's more beneficial on modified cars, and no, it doesn't add power.
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Unread 07-21-2008   #6 (permalink)
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didn't I just say that*LOL*
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