MSD DIS-4 Plus - The 1947 - Present Chevrolet & GMC Truck Message Board Network

46stude · 01-22-2017, 10:44 PM

Well, crud. I got this thing in some parts that came w/ a project truck a good while back. I had no idea exactly what it was, but thought maybe it was just an older version of a 6AL box.

Wrong.

So, anybody know exactly what this would control? Web searches make it seem like a version of a 6AL, but for coil packs? Does it work on the 5.3's? I'm assuming it's useless for the carbed 350 in my Cheyenne.

**PGSigns** · 01-23-2017, 02:46 PM

It is a high output digital ignition. Mostly used on blown or turbo motors to keep them lit. They are expensive. I would sell it and get a digital 6 for your truck.
Jimmy
Here is a link
https://www.msdperformance.com/produ...ss/parts/62153

46stude · 01-23-2017, 08:27 PM

Thanks for the info. Yikes- that is a steep price!

I did some research in to it earlier. I opened up one end & checked. The electronics are not "potted", so even if it didn't work, there's a good chance I could send it to MSD for a relatively cheap repair. ("Potted", it turns out, means encased in goo. LOL)

Guess I'll have to buy a 6AL. That's the way it usually works out: get something cool & expensive, but useless for your situation.

lsversaw · 01-25-2017, 01:12 PM

Don't completely dismiss an original HEI, with or without an aftermarket module in it. I think it's good enough that it costs a lot more to get a small improvement over stock HEI. But a 6AL sure looks good under the hood...

46stude · 01-25-2017, 10:12 PM

It actually has nothing to do with looks or out performing HEI. My Cheyenne has an Accel HEI Super on it & it works great.

My reason for the 6AL is because I'm doing a 4L60e swap & using a TCI EZ-TCU trans controller. It should be here tomorrow. It needs a good tach signal to operate. In some cases, the tach hook-up in the HEI dizzy is too "dirty" of a signal for the TCU to get an accurate reading off of. A better option is a box like the 6AL with a dedicated tach output wire.

01-22-2017, 10:44 PM	#1
46stude Registered User Join Date: Dec 2014 Location: Rockport, Texas Posts: 192	MSD DIS-4 Plus Well, crud. I got this thing in some parts that came w/ a project truck a good while back. I had no idea exactly what it was, but thought maybe it was just an older version of a 6AL box. Wrong. So, anybody know exactly what this would control? Web searches make it seem like a version of a 6AL, but for coil packs? Does it work on the 5.3's? I'm assuming it's useless for the carbed 350 in my Cheyenne. Attached Images

01-23-2017, 02:46 PM	#2
PGSigns Senior Member Join Date: Jan 2011 Location: Hayes Va Posts: 4,569	Re: MSD DIS-4 Plus It is a high output digital ignition. Mostly used on blown or turbo motors to keep them lit. They are expensive. I would sell it and get a digital 6 for your truck. Jimmy Here is a link https://www.msdperformance.com/produ...ss/parts/62153 __________________ 60 to 66 Chevy and GMC window decals http://67-72chevytrucks.com/vboard/s...d.php?t=661131 Good friends, good food and a hotrod what else do you need? 1966 BBW long fleet Daily driver 1965 BBW short fleet Sold and going to a good home 1965 Suburban 2003 3500 Duramax 2005 Ultra Classic

01-23-2017, 08:27 PM	#3
46stude Registered User Join Date: Dec 2014 Location: Rockport, Texas Posts: 192	Re: MSD DIS-4 Plus Thanks for the info. Yikes- that is a steep price! I did some research in to it earlier. I opened up one end & checked. The electronics are not "potted", so even if it didn't work, there's a good chance I could send it to MSD for a relatively cheap repair. ("Potted", it turns out, means encased in goo. LOL) Guess I'll have to buy a 6AL. That's the way it usually works out: get something cool & expensive, but useless for your situation.

01-25-2017, 01:12 PM	#4
lsversaw Registered User Join Date: Aug 2013 Location: McPherson, KS Posts: 86	Re: MSD DIS-4 Plus Don't completely dismiss an original HEI, with or without an aftermarket module in it. I think it's good enough that it costs a lot more to get a small improvement over stock HEI. But a 6AL sure looks good under the hood... __________________ Scott 1972 C20 long-wide. 350/350, Cheyenne Super, wood bed, PS, PB, dual batteries, dual tanks, leaf springs, gauges. No significant rust. No significant paint. 1971 C10 short step. Originally a 250/3ott with no options, now a 350/4L80. I purchased it already restored; only needs about 300 little details fixed.

01-25-2017, 10:12 PM	#5
46stude Registered User Join Date: Dec 2014 Location: Rockport, Texas Posts: 192	Re: MSD DIS-4 Plus It actually has nothing to do with looks or out performing HEI. My Cheyenne has an Accel HEI Super on it & it works great. My reason for the 6AL is because I'm doing a 4L60e swap & using a TCI EZ-TCU trans controller. It should be here tomorrow. It needs a good tach signal to operate. In some cases, the tach hook-up in the HEI dizzy is too "dirty" of a signal for the TCU to get an accurate reading off of. A better option is a box like the 6AL with a dedicated tach output wire.



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