Msd blaster 2 coils going bad

I have gone through 2 coils. They get almost as hot as the headers. What could cause this? Bad voltage regulator or alternator?

Is the blaster 2 coil the small dry style coil? If so I have not heard good things about them. I had one fail on me on Drag Week 2013 and the only spare ignition pieces I didn't have was a coil, I left 2 of them on the bench at home lol. The one that failed maybe had 1000 miles on it tops.

Add me to the list

Blaster 2 red coil will ballast lasted about three summers

My Blaster high vibration lasted not even a summer

Both started running erratic missing at higher RPMs and the tell tail sign was the Auto Meter Tachometer bouncing all over the place even at lower RPMs

Running a Mopar “Made In The USA” brand new coil in the box that I bought sometime in the 90s that I found in the attic

Has been flawless with the Mopar Performance Chrome ECU and a factory Chrysler 400 Distributor that I rebuilt

What else is part of your ignition system ? Points or Electronic ? Using a Ballast Resistor ?

If Electronic what are you running for a box , MSD or Mopar ECU

My black blaster 2 coil didn't last a year got every bit as hot as the headers. I'm running a msd 6al-2. Sent it back to get checked and they just sent a new one. Still in the box and never used. Using an HVC 11 coil now.

I've posted this before, but it's probably buried in the Archives:
I'll assume we're discussing failures of the oil-filled cylindrical Blaster 2.
Ran one for many years, mounted horizontally, with an MSD6, recurved MP distributor.
MSD wants main power to be connected directly to battery, no ballast resistor.
Anyway, all was good until one day no start.
Tested the MSD, it failed.
Sent it to West Tech in NC & spoke with them, they asked about the coil.
Bottom line, horizontal mounting kills the oil-filled coils (vertical not so much); they were amazed I'd had it that way for many years (didn't drive the car that much).
Anyway, that created a problem in the MSD box. Basically, overheating = resistance = failure.
They fixed that and recommended the epoxy coils; the F150/302 coil = the equivalent MSD minus the red paint, at about $40 with separate dedicated pigtail from AutoZone, etc.
Also requires HEI-style coil wire, inexpensive again from AutoZone or whatever.
Not only fixed, but faster startup & cleaner running afterwards, and I've swapped out a couple of B2 coils with that setup since and highly recommend it.

Have a part number on that f150 coil? just noticed a high rpm miss and have a blaster 2, picked up a replacement but from sounds of it I should return it.

Don't recall #, but it's for '90 F150 with 302/5.0
Looks a lot like an HEI coil but with 2 spade terminals instead of 3 wires.
The dedicated terminal/plug, some uninsulated butt splices, and some shrink tubing makes for a clean installation.
I usually fab a bracket out of angle-stock aluminum and mount the coil to it with some long bolts, other end to engine somewhere.
Can be mounted at any angle or direction you like.

FD-478 is the part # for the ford coil. I just replaced my blaster 2 with one last week.

this is it. CFD-478 at rockauto

Not to discount the quality of the FD-478, but what are other guys using for a coil( Mallory, Accel,...???). I have a Blaster 2 with a MSD 6-AL, and
at 3/4 track it seems to stutter or breakup intermittently, also the Tach has been wacky intermittently. any advice would be appreciated.
Also how would you mount the fd-478.

the stutter/breakup, is it the same in all 3 gears at the same RPM or just in high gear? Yes that coil is gonna need a bit of fabbing to mount it.

Anytime my car had a hiccup or misfire it was always MSD box related, I went through a few Digital 6 boxes over several years. I only had the one coil die and it was a NO FIRE and not a misfire problem. I ejected all the MSD stuff from my car when I went with fuel injection and have enjoyed the reliability.

I wouldn't discount that ford coil as not having enough spark if that is what you are worried about. The later model cars have some pretty hot coils on them. I know chevrolet also had a coil similar to that ford coil that could support some pretty decent power.

Mine went a year or two ago.Burned a small hole in the tower first.I fixed that temporarly with some RTV.It was at least 15 years old.The one on there now is two years old.My kid ran the same on his 62 and it was 15 years old when he sold it.Rocky

I use the MSD 8252 (Blaster HVC) coil on the cuda and it's been great since 2006.
I have the ford coil (FD-478 or Auto Zone C-839) on the road runner.

I had misfiring issues w/ 2 brand new MSD Digital 6 Plus boxes years ago (2003-2004). Put my old analog 6AL back on and never looked back. I'm still leery of the digital boxes and not a fan of anything that needs a computer to tune it, even though they have some awesome features I could really use.

I had this happen and it was the tach causing it. Took forever to find it but got lucky one day and saw the tach acting weird. No problem in 6 years since replacing it. Easy test just disconnect the tach wire on the msd box and see if it goes away.

I've seen this also on a friend's Camaro. Intermittent misfire and it was the tachometer (5" Autogage) causing it. Unplugged it from the MSD box and no more problem.

What I find interesting about the coil laying on its side causing the problem is, that’s how most of the Mopar V8 coils were mounted from the factory.
Are those oil filled?

Mine was the 8222 vibration epoxy blaster that they claim could be mounted sideways and it still got extremely hot.

FWIW...there's a 20 year old MSD Blaster 2 coil on my dad's road runner and it's mounted sideways. Been on his car since 2008 and it was on my car from 1998-2006.
Guess it may be like everything else...the quality nowadays isn't what it used to be.

I don't know what the horizontal oil-filled deal is - yup, factory did it, and mine I referred to sat there from 1988-2014.
I've owned a bunch of stock '67-up Mopars with their original coils, up until around 2000 when I most of them off.
But I've heard before that oil-filled coils are not actually full, and get hot, which I guess creates resistance in MSD boxes?
Nevertheless, that F150 epoxy coil works great if you don't need stock-appearing.

See a few brands of the f150 coil is one any better then others?

^^^ I was wondering that myself, Mine (in the pic) was dirt cheap from rockauto. I ain't used this one yet. It does get dynamite reviews. A prior one was real good but I dont remember the brand/where I got it, ran it straight thru, no ballast/OE electronic 70's (pre mallory) dist

With my luck with aftermarket parts I would feel better about a new one from the dealer, or an OEM one from a salvage before I used one from a parts store. My last couple of dealings with parts store parts haven't gone well, from a speed sensor that didn't work to a water pump so poorly cast the bolts wouldn't even go in it.

so would you go down the track without a tach??? i don't think i have a spare tach sitting around.

Yes I just ran it without one kinda by ear since I had a rev limiter and the problem was showing up before red line. I was talking to Rick Allison (AA transmission) about what happened at Gateway one year and asked if he could believe it and he said yep same thing happened to him he said his crew was laughing at him thinking he forgot to turn on the second fuel pump but it was a bad tach.

I should add that my MSD first burnt up a chrome accel super stock coil and left me stranded before I changed it to the 8222 blaster which in turn was getting super hot. Ended up with the high dollar 8253 which has been fine.

The epoxy filled MSD blaster coil on our 70 RR lasted maybe 6 months. I got it to replace the cooked Accel coil that had lasted for maybe 8 years. Threw in a spare 20-30 year old plain old Lucas coil we had on the shelf. It worked but one of the low voltage studs was stripped so gave an intermittent misfire. Got a brand new Lucas Sport Coil for like $40 and been working fine until we parked it due to the rust.
Returned the MSD coil for credit, Summit was great about it, refunded my credit card promptly, no issues there.