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 Noise after MSD install 
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Ok just install a msd 6a analog box and tfi coil under my dash and I wasn't expecting the noise. Sounds like a power wire hum/buzz! The box is wired to the batt with 10ga. Not the 1st time I put one under a dash but the other car had a louder exhaust. I also noticed an electric motor kinda smell when I got on it one of the times and when I popped the hood. This car has nothing power but the msd and lights with a new 100amp alt.

Is the noise normal?

Is it the coil or box?

Anyone know if the digital boxes are quieter?

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Sat Jul 09, 2016 7:10 pm
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Just found this quote from a guys email response who posted a sim question on another forum.

"Sir,

Thank you for your use of our products. That is actually common. Most
times the box is mounted under the hood and the engine sound drowns it
out. When the box is mounted in the cab most are alarmed to hear it
buzzing. The transformer in the box is operating at a frequency that is
audible to the human ear. This is similar to driving by a power station
and hearing a buzzing sound.

Thanks,
MSD tech "

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Sometimes you ask the wrong question, but it still leads to the right answer.


Sat Jul 09, 2016 7:16 pm
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Just changed to a diff TFI coil and the pitch got higher & quieter.

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Sometimes you ask the wrong question, but it still leads to the right answer.


Wed Aug 03, 2016 12:13 pm
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