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 Coil for MSD 6AL - early non-digital 
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Joined: Thu Dec 12, 2013 6:56 pm
Posts: 58
I bought an older MSD box recently and I am trying to decide what coil to use with it. I know the TFI stock replacement coils work well with these and are very cheap. MSD recommends the HVC coil part number 8252.

I was originally planning to get the TFI coil but I recently saw the MSD coil in person and it is a massive unit. I would estimate it at around 50% heavier than a TFI coil. Typically size and weight tells a big part of the story on a coils output. Is it worth spending the extra $80 for the HVC coil?

My application is a dirt circle track car with around 500 hp. Typically 30 laps or less.


Thu Mar 03, 2016 6:59 pm
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Joined: Fri Feb 08, 2013 2:37 pm
Posts: 1744
Perhaps you could mount it in the car where you need some weight?? They do make more energy but not 10 times more like they cost. Personally, I wouldn't refuse one if someone gave it to me but I wouldn't waste the money when it could be spent for something that actually would make the car faster, unless you have a Pentagon or NASCAR budget. Maybe you can borrow one and try it.


Thu Mar 03, 2016 8:09 pm
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Joined: Thu Dec 12, 2013 6:56 pm
Posts: 58
Thanks tuner


Fri Mar 04, 2016 12:13 am
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 375
Location: Phila. Penn.
A little late to the party, but about 10 years ago when I was looking at coils to go with the MSD 6T the MSD tech suggested their SS e-core was a good choice, although the HVC would be be even better. I didn't notice any performance improvement over the Blaster2, but do not have a scope and no back to back track or dyno tests to validate my opinion.

Below are some coil specs I collected at the time. It's not clear to me why the SS would be considered a good replacement for the Blaster 2.
Attachment:
Coil-specs.jpg
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Sat Mar 19, 2016 11:25 am
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
I've herd the msd ss coils fail often. I have a few TFI coils I have been playing with on a couple HEI's and will try them one by one on a msd 6al analog box this summer, also have a msd digital box and Mallory dig dist I'm gonna try them on.

You cannot judge the msd TFI coil by weight it does not have the heavy metal frame, even the sides that look like frame are hollow. That said I have only used my msd tfi coil for a few start ups and not compared it to the Mallory that was on before. The Mallory outperformed a summit brand of equal specs on HEI and it's the older of those two coils. Both coils are discontinued so that doesn't really help LOL. Still I suspect the summit is lower quality as the metal frame isn't coated and rusted. I also have another summit TFI of diff specs that is supposed to be more ideal for CD ignition, but not tried it with CD yet.

I read an article awhile back that had a basic set of guidelines for coil selection, but idk how true IF the coil specs are correct. Basically everything I've read trial and error testing shows best results in the end. I did take some screenshots of the article because sometimes they take stuff down eventually. Here is the basic guide, and of course there are other factors to consider.

Image

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Tue Mar 22, 2016 12:54 am
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Just killed the MSD TFI coil in less than 40 miles..........

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Sat Apr 16, 2016 1:07 am
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Joined: Sun Jun 23, 2013 1:41 pm
Posts: 375
Location: Phila. Penn.
What was it paired with?

BOOT wrote:
I've herd the msd ss coils fail often. I have a few TFI coils I have been playing with on a couple HEI's and will try them one by one on a msd 6al analog box this summer, also have a msd digital box and Mallory dig dist I'm gonna try them on.

This chart was posted in an older HAMB thread I came across. Looked to be from an (ex?)MSD employee.
I find it mysterious as to why the 6AL would produce a different current and duration than a 6A, 6T or 6C.
Attachment:
File comment: Current & Duration of MSD Coils (older)
coil current-hamb.gif
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Quote:
You cannot judge the msd TFI coil by weight it does not have the heavy metal frame, even the sides that look like frame are hollow.

Can you clarify what you mean about sides being hollow? I don't understand.
Here's some photos of a Standard Blue Streak FD478 (made in Poland) which I beleive is intended as replacement for Ford TFI ignitions. FWIW It weighs 1lb. 10.35 oz on a postal scale.
Attachment:
Std-FD478-1.JPG
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Attachment:
Std-FD478-8.JPG
Std-FD478-8.JPG [ 36.78 KiB | Viewed 353 times ]


Sat Apr 16, 2016 8:28 am
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Joined: Sun May 12, 2013 5:21 am
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Location: Michigan
Here is a link to the one that failed http://www.summitracing.com/parts/msd-8227 , you can see how it does not have the heavy metal frame all around and even the sides are hollow. The center epoxy part was super hot long after it died and I almost suspect the design is partly to blame since a normal TFI coil the metal frame is hotter than the center.

I normally use an alum heatsink mount but the msd was too big and I made some alum brackets instead. This is the same type alum heatsink mount but much cheaper than a Mallory https://speedmaster79.com/pce3821036-un ... ion-black/ I still have yet to try the speedmaster/proform coil, but I bought one for the mount at least. I wanted to have a few mounts so I can swap them quick to test & I use TFI coils in my 3 cars.

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Sat Apr 16, 2016 12:56 pm
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Joined: Sat Mar 29, 2014 10:27 am
Posts: 45
BOOT:
If you are using a HEI distributor are you using the low resistance HEI cap center brush?


Sat Apr 16, 2016 2:15 pm
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Joined: Sun May 12, 2013 5:21 am
Posts: 332
Location: Michigan
Yup low res MSD bushing check!

This coil http://www.summitracing.com/parts/MAA-30440/ worked for a few yrs same as it is and is still working on another car.

I am upgrading the primary wiring atm and gonna test the coil 8.5mm wire just to rule it out.

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Sat Apr 16, 2016 4:14 pm
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