4 trashed MSD boxes in 5 hours??
#1
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I need some direction if anyone can help. I just had new motors built and installed (572 NA) in my 96' Top Gun. Everything was brand new from scratch. They installed MSD 3L's and I have burned up 4 of them in 5 hours 2 on each motor. We switched to the 2L's, same deal. I'm tired of throwing parts at it and everyone is stumped. I'm hoping the hive mind can steer me in the right direction.
Thanks
Thanks
#2
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Are they wired straight to the battery? If not, probably your problem. If a decent distance from battery up the gauge of the wire.
And straight to the battery is not the battery cable at the starter that goes to the battery.
And straight to the battery is not the battery cable at the starter that goes to the battery.
#3
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Are you using compatible coils?
There's a coil compatibility chart on the Holley site.
There's a coil compatibility chart on the Holley site.
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ThisIsLivin (07-27-2021)
#6
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#7
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https://www.holley.com/support/ignition/
Look for link "Wiring Diagrams and Tech Notes" (PDF file).
All the "Blaster" coils seem to be compatible with the 6-series boxes.
Look for link "Wiring Diagrams and Tech Notes" (PDF file).
All the "Blaster" coils seem to be compatible with the 6-series boxes.
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PROP STAR (07-27-2021)
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Check the voltage difference between the direct battery feed line to the MSD box and the switched hot lead to the box from your ignition switch (can't remember the max. allowable difference..) I had a problem years ago with my '79 233 Interceptor eating boxes (not quite as often as yours) and installed a relay that supplies direct battery voltage to the box when energized by the ignition switch. Haven't had a box failure since (still carry a spare 'tho.)
Good luck- hope this helps!
Good luck- hope this helps!