MSD Ignition box

mike britt · 02-12-2023, 07:35 PM

Can you get away with running a 6AL or do you have to have a 7AL. This is a 350 TPI 245/281 combo. Any advise would be appreciated.

Rory McNeil · 02-12-2023, 11:32 PM

I have had the same MSD 6T ignition box in my low 10-high 9 second bracket car for over 30 years, with zero issues. And I used a MSD 6AL in my 85 Mustang Stocker, but have never used a 7 series box, so I can`t say if a 7AL may potentially be any better. Certainly didn`t notice any downfalls with the 6 series.

427FE · 02-13-2023, 08:10 AM

Do you have it already?

Craig Porter · 02-13-2023, 09:36 AM

I bought a bracket car from a friend of mine two years ago and it had a digital 6 plus in it and worked great . I completely rewired the car last year and put a 7 AL box in it that I had and it didn’t run any different .

4543 · 02-13-2023, 09:41 AM

Mike I have a Digital 6 in the Corvette. Works fine. How’s the car doing? Mike McMahan

mike britt · 02-13-2023, 09:44 AM

I have a 7 AL2 in it now but I am going to replace it because I think it has a problem. At 6300 it acts like it's on a rev limiter and I allready replaced the distributer and wires so it's next.

PozQB14 · 02-13-2023, 10:06 AM

Hey Mike, what kind of shifter do you have? A few years ago, I had a similiar problem and it was my turbo action line lock button that wasn't fully disengaging. I had to push on the wires to ensure the little red button was fully out.

Henrys Toy · 02-13-2023, 09:26 AM

Quote:

Originally Posted by mike britt

Can you get away with running a 6AL or do you have to have a 7AL. This is a 350 TPI 245/281 combo. Any advise would be appreciated.

Good morning to all,
Yes you can certainly use an MSD 6AL box, the 7AL " might " be slightly better in overall performance, but the 6 box will work. Over the years I've found the 6 series boxes to be the most reliable. That's what I've found, good luck with your racing season.

Respectfully,
Henry Kunz 1534 H/SA

02-12-2023, 07:35 PM	#1
mike britt Member Join Date: Mar 2013 Location: Italy, Texas Posts: 176 Likes: 367 Liked 66 Times in 31 Posts	MSD Ignition box Can you get away with running a 6AL or do you have to have a 7AL. This is a 350 TPI 245/281 combo. Any advise would be appreciated.

02-12-2023, 11:32 PM	#2
Rory McNeil VIP Member Join Date: Jun 2007 Location: from Vancouver BC Canada, now in Nova Scotia Posts: 1,311 Likes: 315 Liked 1,103 Times in 301 Posts	Re: MSD Ignition box I have had the same MSD 6T ignition box in my low 10-high 9 second bracket car for over 30 years, with zero issues. And I used a MSD 6AL in my 85 Mustang Stocker, but have never used a 7 series box, so I can`t say if a 7AL may potentially be any better. Certainly didn`t notice any downfalls with the 6 series. __________________ NHRA 6390 STK M/S 85 Mustang

02-13-2023, 08:10 AM	#3
427FE Member Join Date: Sep 2016 Location: Monroe Twsp, NJ Posts: 192 Likes: 260 Liked 348 Times in 79 Posts	Re: MSD Ignition box Do you have it already? __________________ Pat Clemente #1427 B/S

02-13-2023, 09:36 AM	#4
Craig Porter Junior Member Join Date: May 2021 Posts: 45 Likes: 0 Liked 97 Times in 25 Posts	Re: MSD Ignition box I bought a bracket car from a friend of mine two years ago and it had a digital 6 plus in it and worked great . I completely rewired the car last year and put a 7 AL box in it that I had and it didn’t run any different .

02-13-2023, 09:41 AM	#5
4543 Senior Member Join Date: Apr 2005 Location: Texas Posts: 638 Likes: 57 Liked 634 Times in 139 Posts	Re: MSD Ignition box Mike I have a Digital 6 in the Corvette. Works fine. How’s the car doing? Mike McMahan

02-13-2023, 09:44 AM	#6
mike britt Member Join Date: Mar 2013 Location: Italy, Texas Posts: 176 Likes: 367 Liked 66 Times in 31 Posts	Re: MSD Ignition box I have a 7 AL2 in it now but I am going to replace it because I think it has a problem. At 6300 it acts like it's on a rev limiter and I allready replaced the distributer and wires so it's next.

02-13-2023, 10:06 AM	#7
PozQB14 Member Join Date: Jun 2015 Location: Youngsville, NC Posts: 129 Likes: 24 Liked 42 Times in 17 Posts	Re: MSD Ignition box Hey Mike, what kind of shifter do you have? A few years ago, I had a similiar problem and it was my turbo action line lock button that wasn't fully disengaging. I had to push on the wires to ensure the little red button was fully out.