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Discussion Starter #1
What is the purpose of those fancy MSD ignition boxes? I know they control spark but that's about it. I have an HEI setup but am always looking for ways to improve performance or heck, just make my engine bay look cooler. My understanding (obviously very limited) is that the units are not necessary with HEI. Is this true? Do they make products to run with HEI? If so, what are the benefits?

Many thanks in advance!
 

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Hotter spark, rev limiters, better cold startups. Yes you can put one on an HEI, almost any distributor can be used to trigger the box.
 

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Discussion Starter #3
Thanks! Are they difficult to set up or just plug and play? I have a 327 with HEI, nothing too crazy. Would it be any benefit to me at all?
 

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Hotter spark, rev limiters, better cold startups. Yes you can put one on an HEI, almost any distributor can be used to trigger the box.
Also helps when taking it through smog. Hotter spark, better combustion fewer emissions.

My car starts better when cold with the box than the truck with an HEI.

Ray
 
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