msd digital 6plus
Safety Car
Joined: Apr 2004
Posts: 4,532
Likes: 7
From: Lahaina Hi
The wires for the harness come in the kit.
Look at the long silver conectors with the white red and black wires .
It's in the box sealed in a bag.
Just so you know the hook up is mickey mouse and not like my clean install on my LT1.
YOu will need a lot of wire to install this right.
You will also need to remove your dist cap and see how many pins you have on the module.
I think it's 5 or 7 pin for the correct instructions.
Look at the long silver conectors with the white red and black wires .
It's in the box sealed in a bag.
Just so you know the hook up is mickey mouse and not like my clean install on my LT1.
YOu will need a lot of wire to install this right.
You will also need to remove your dist cap and see how many pins you have on the module.
I think it's 5 or 7 pin for the correct instructions.
Race Director
Joined: Sep 2001
Posts: 14,659
Likes: 749
From: NEwhere Ohio
I dont know if this will happen with non-optispark vettes but I had 3 MSD digital 6 plus's fail on me leaving me stranded on one occasion on a 45 MPH two lane country road at night with no berm. Im lucky to be alive.
Heres what would happen. I installed the digital 6 plus -according to instructions. It would work fine for maybe a week and then everything would suddenly die. Not cool. Id have to bypass it to get the car to work again. Id take it back to summit racing, throw a new unit in and the same thing would happen. It would work fine for a week then die.
I originally got it for its retard function for when i spray nitrous. Turns out I didnt need retard anyways.
The Digital 6 plus is a garbage trash product at least on optispark corvettes. So you might be ok since your 85 is not an optispark..
It seems to me that other C4's ran fine on it and also the MSD 6AL seems to be an ok choice as well (even on optispark vettes).
Im not the only person on here with MSD Digital 6 plus problems. Good luck in your decision.
Heres what would happen. I installed the digital 6 plus -according to instructions. It would work fine for maybe a week and then everything would suddenly die. Not cool. Id have to bypass it to get the car to work again. Id take it back to summit racing, throw a new unit in and the same thing would happen. It would work fine for a week then die.
I originally got it for its retard function for when i spray nitrous. Turns out I didnt need retard anyways.
The Digital 6 plus is a garbage trash product at least on optispark corvettes. So you might be ok since your 85 is not an optispark..
It seems to me that other C4's ran fine on it and also the MSD 6AL seems to be an ok choice as well (even on optispark vettes).
Im not the only person on here with MSD Digital 6 plus problems. Good luck in your decision.
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Optispark or no has nothing to do with it.
I've been running the digital six for about 3 years now with no problems. It gets water dumped on it every time it rains or I wash the car.
I know too many people who have good luck with MSD products to call them trash. They are a very good company to deal with, maybe they just had a bad production run.
The ultimate question though is this.... Do you need it? I use it because it provides a better rev limiter than the stocker does. If your car is stock though there really isn't much use in it.
I've been running the digital six for about 3 years now with no problems. It gets water dumped on it every time it rains or I wash the car.
I know too many people who have good luck with MSD products to call them trash. They are a very good company to deal with, maybe they just had a bad production run.
The ultimate question though is this.... Do you need it? I use it because it provides a better rev limiter than the stocker does. If your car is stock though there really isn't much use in it.
Drifting
Joined: Aug 2001
Posts: 1,407
Likes: 0
From: Houston TX
Originally Posted by dizwiz24
I dont know if this will happen with non-optispark vettes but I had 3 MSD digital 6 plus's fail on me leaving me stranded on one occasion on a 45 MPH two lane country road at night with no berm. Im lucky to be alive.
Heres what would happen. I installed the digital 6 plus -according to instructions. It would work fine for maybe a week and then everything would suddenly die. Not cool. Id have to bypass it to get the car to work again. Id take it back to summit racing, throw a new unit in and the same thing would happen. It would work fine for a week then die.
I originally got it for its retard function for when i spray nitrous. Turns out I didnt need retard anyways.
The Digital 6 plus is a garbage trash product at least on optispark corvettes. So you might be ok since your 85 is not an optispark..
Im not the only person on here with MSD Digital 6 plus problems. Good luck in your decision.
Heres what would happen. I installed the digital 6 plus -according to instructions. It would work fine for maybe a week and then everything would suddenly die. Not cool. Id have to bypass it to get the car to work again. Id take it back to summit racing, throw a new unit in and the same thing would happen. It would work fine for a week then die.
I originally got it for its retard function for when i spray nitrous. Turns out I didnt need retard anyways.
The Digital 6 plus is a garbage trash product at least on optispark corvettes. So you might be ok since your 85 is not an optispark..
Im not the only person on here with MSD Digital 6 plus problems. Good luck in your decision.
Drifting
Joined: Aug 2001
Posts: 1,407
Likes: 0
From: Houston TX
I see Nathen has posted his comments about MSD. I respect Nathen's knowledge but all I know is mine did not work, again and again.
Most of my work has been don at MTI in Houston, a very respectable and competent shop. MTI gave up on my MSD box. I was using this to retard for nitrous. MTI told me not to spray with our a retard.
Most likely because they built my engine and did not want the responsibility of recommending nitrous without retard. In checking around some advise is to spray up to 100HP without retard others say no.
I am lost at this point with my nitrous system and have not used it since the continuous failure of MSD. Very frustrating but I will not try andother MSD box. "I'd rather leave home without it" - at least I will get home.
Any comments form the experts will be appreciated.
Most of my work has been don at MTI in Houston, a very respectable and competent shop. MTI gave up on my MSD box. I was using this to retard for nitrous. MTI told me not to spray with our a retard.
Most likely because they built my engine and did not want the responsibility of recommending nitrous without retard. In checking around some advise is to spray up to 100HP without retard others say no.
I am lost at this point with my nitrous system and have not used it since the continuous failure of MSD. Very frustrating but I will not try andother MSD box. "I'd rather leave home without it" - at least I will get home.
Any comments form the experts will be appreciated.
Melting Slicks
Joined: Mar 1999
Posts: 2,535
Likes: 2
From: Rochester NY
msd dIGITAL 6+. Here is .02 when I have digital 6 box install not by pass the tach filter, my tach is pumping up and down, but I drive the car anyway for a few months. At a few ocassion it left me stranged. When that happened I then disconect the box and the car will start right up without any problem. When the box got me stranged twice, I call MSD and sent the box to them to check out because I thought the box is bad. They did a TEST on the box 24hrs test run and they found the box is fine and they sent it back to me. I got the box and installed on to the car again. within week my car die again.
When I finally found the darn tach filter and bypass it. My tach is working properly and ever since I have not had any problem what so ever. The box is works like a champ, never have a stranged me because of the box. So I assumed all the problems other people talking about must be associate with the tach filter. At least it was mine problem. Other than that would I buy it again?? absolutely will buy it again.
Bruce
When I finally found the darn tach filter and bypass it. My tach is working properly and ever since I have not had any problem what so ever. The box is works like a champ, never have a stranged me because of the box. So I assumed all the problems other people talking about must be associate with the tach filter. At least it was mine problem. Other than that would I buy it again?? absolutely will buy it again.
Bruce
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Race Director
Joined: Sep 2001
Posts: 14,659
Likes: 749
From: NEwhere Ohio
I concur with scorp, if you must go the digital 6 route, a plug and play harness was available for my 93.
It made the installation cake.
But again, see red-y s and my comments.
Id again try to think what do you need it for. After my experiences its another piece in the loop to malfunction (and in my case 3 separate units did).
I just find it odd everyone is having bad production runs. Optima batteries, MSD units, etc.
I think theres a lot of aftermarket garbage out there that has been hastily thrown together to capture marketshare from the 'Fast and Furious' crowd.
On the flipside, I had an old 1994-vintage MSD 6 on my points distributer 1972 Pontiac Lemans 400. To this day it still runs fine.
The Digital 6 plus though has issues - at least on 1993 corvettes.
It made the installation cake.
But again, see red-y s and my comments.
Id again try to think what do you need it for. After my experiences its another piece in the loop to malfunction (and in my case 3 separate units did).
I just find it odd everyone is having bad production runs. Optima batteries, MSD units, etc.
I think theres a lot of aftermarket garbage out there that has been hastily thrown together to capture marketshare from the 'Fast and Furious' crowd.
On the flipside, I had an old 1994-vintage MSD 6 on my points distributer 1972 Pontiac Lemans 400. To this day it still runs fine.
The Digital 6 plus though has issues - at least on 1993 corvettes.
Drifting
Joined: Aug 2001
Posts: 1,407
Likes: 0
From: Houston TX
Originally Posted by brogden31
i put in my digital 6 yesterday and so far i am very pleased runs so much smoother.
