[leeklm]

Hi All, not sure i would call it an upgrade, but replacing my reliable HEI with an MSD 8563, mostly due to being tired of limited clearance with the hei in the firebird.

The one and only time I used an aftermarket Acel coil back in the day, it was garbage! What coil would you suggest for good reliability in a mostly strip car using the 8563 and 6AL2 box?

I was looking at the MSD Blaster HVC (round) or maybe the MSD Blaster Ecore HVC or HVCII?

What has worked well for everyone?



Sent from my SM-G965U using Tapatalk

[Scott Stoneburg]

I've been using a MSD Blaster ( round) coil for 30+ years. No issues. I am switching soon due to changing over from a MSD 6A to a MSD 7AL2 box.

[chuckies76ta]

Here is a list of compatibility coils from MSD. https://static.speedwaymotors.com/pdf/5477222.pdf From MSD https://www.holley.com/brands/msd/pr...n_coils/page=5
I'm running a 6AL-2 programmable box and using a MSD # 8222 coil with no issues. I was also told that the MSD # 8253 is a very good coil, but is very expensive. I've been running the #8222 for years on both cars with no issues.

[Mr Anonymous]

I use Digital-6 boxes and Blaster SS coils. It makes enough *ss to make my chest feel funny for a few days after it arced from one arm to the other and across my chest. Ouch.

[Bill Eveland]

Ive been using the MSD HVC II coil with my MSD 6a box.

[CraigG.]

Originally Posted by Bill Eveland

Ive been using the MSD HVC II coil with my MSD 6a box.

Recommended by mark sullens and my car runs better with it and e85 and 12 1/2 to 1 +

Hate the expense loved the improvement

[firechickenman]

I've been using the same MSD Blaster SS coil for years. First with a 6AL and now with a Programmable 6AL-2. No issues yet, but I do carry a spare.

[Half-Inch Stud]

Oil-soaked coils-in-can are most reliable. Big Yellow or black cases are non-functional. Is all about the XFMR!

Is all about the Primary trigger: Solid-State beats Points (even Double). HEI module beats all other due to Built-in variable Dwell.

[Half-Inch Stud]

Oil-soaked coils-in-can are most reliable. Big Yellow or black cases are non-functional. Is all about the XFMR!

Is all about the Primary trigger: Solid-State beats Points (even Double). HEI module beats all other due to Built-in variable Dwell.

These statements are valid to low 9's.

[Dragncar]

Originally Posted by Scott Stoneburg

I've been using a MSD Blaster ( round) coil for 30+ years. No issues. I am switching soon due to changing over from a MSD 6A to a MSD 7AL2 box.

The Blaster coil works fine with 7AL-2. Been running the combo for years.

[Dragncar]

Originally Posted by Half-Inch Stud

Oil-soaked coils-in-can are most reliable. Big Yellow or black cases are non-functional. Is all about the XFMR!

Is all about the Primary trigger: Solid-State beats Points (even Double). HEI module beats all other due to Built-in variable Dwell.

These statements are valid to low 9's.

Have to differ on the Solid- State beats points. Not if you use the points to trigger a MSD box. I have run single points with a 7AL-2 since the 80s. Only 2 sets of points and when I changed the first set 10-15 years ago I changed them for no real reason, not worn out.
Even ran back to back tests at the track with distributors with the same advance curve. Ran the same ET-MPH.
As long as the engine is not ran past 8000RPM, and how many Pontiacs can do that there is no power difference.

[Half-Inch Stud]

Originally Posted by Dragncar

Have to differ on the Solid- State beats points. Not if you use the points to trigger a MSD box. I have run single points with a 7AL-2 since the 80s. Only 2 sets of points and when I changed the first set 10-15 years ago I changed them for no real reason, not worn out.
Even ran back to back tests at the track with distributors with the same advance curve. Ran the same ET-MPH. As long as the engine is not ran past 8000RPM, and how many Pontiacs can do that there is no power difference.

Just maybe the MSD box has the variable Dwell chip? Otherwise, your success and assumption of bestness may have left some performance on the table. Just figure that your points needed the MSD box to restore performance.

The OHC6 Spring engine i had was dogging on the Factory single-Point, then much better with the Mallory Dual-Point, yet unquetionable bested with a 6-CYL HEI grafted on. HEI enabled 7500 rpm many many times on street driving a 4-speed.

Yet I understand that some folks can manage points ( dual points) successfully. When getting down to tuning, i'm not that patient to question fulel and spark. So secure with just questioning fuel adjustments, knowing the Spark is not wearing a point block, nor spring, nor point conduction gap. Rainy days, and Humid mornings were doom formy points on the street.

[Dragncar]

HIS, I am just using the points to trigger the MSD box and it does all the work. No current draw so they last forever. Toyota used to use the same ignition for years.
I tested my setup vs a factory points distributor converted to electronic and a HEI. All with the same advance curve.
Done in one day at the drag strip and there was zero difference.
IMO ignition is the most overrated hot rod power deal out there. It just has to work for the RPM needed and with the right advance curve. Heck, a lot of race engines are locked out anyway.
A friend of mine sold me his MSD crank trigger and gave me a complete BOP front sideways distributor setup while he was at it.
Replaced it all with a nice HEI distributor to keep it simple. He found no power difference either.
I understand a crank trigger is worth 7 HP on a dyno but its kinda hard to see 7 HP at the track.
Simple is better most of the time.

[tc]

https://documents.holley.com/techlib...ompability.pdf