LT1-LT4 Modifications 1993-97 Gen II Small Block V8

MSD box on a stock opti?

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Old Apr 9, 2008 | 07:09 AM
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Question MSD box on a stock opti?

Can you run a MSD ignition box on a stock opti and will the MSD ignition box's fry the stock opit.
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Old Apr 9, 2008 | 07:19 AM
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That's what I hear. It seems that the stock opti cap/rotor tend to frown upon the MSD OUTPUT.
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Old Apr 9, 2008 | 07:53 AM
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Originally Posted by Vicious95Z28
That's what I hear. It seems that the stock opti cap/rotor tend to frown upon the MSD OUTPUT.
I have a MSD cap and rotor and a MSD coil on the car.
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Old Apr 9, 2008 | 08:44 AM
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i have a full msd system on my car, minus the opti that is stock. BUT, it is not the original. the msd system destroyed my original opti and I had to get it replaced. I can't prove it was the msd but very shortly after the install it crapped out.

i had a friend of my dad's work on it and he tried blaming the msd system and replaced all of it with stock ignition parts and it ran worse. turns out it was the opti like I told him in the first place.

long story short on a low mileage opti i would not worry
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Old Apr 9, 2008 | 10:18 AM
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Ray@Nitrous Outlet
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My 94 still has the OEM/STOCK opti on the car, and has been running a MSD Digital 6 and a big MSD coil for over 6 years.

I have had absolutley zero opti related issues, maybe mine is a freak.
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Old Apr 9, 2008 | 04:55 PM
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ran my stock opti on a 6al for a few thousand miles before i did the cam install and changed to the msd cap and rotor. the stock pieces looked good when i pulled them other than only one plastic rivet left and loose. lol!
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Old Apr 9, 2008 | 05:07 PM
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I just put a 6al in my 94 caprice w/ the stock opti and it took the opti out in about 600 miles. But the car does have 136k so still not sure if the msd just did it in or just having that many miles did.
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Old Apr 9, 2008 | 05:09 PM
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I installed the 6al box on my T/A with 1yr old opti and it only lasted two weeks. Maybe it was a defective opti???
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Old Apr 9, 2008 | 05:29 PM
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You know when folks ask a question like this I think the first response should be someone asking you why you want to put a box on the car atall???

The stock ignition really doesn't need any help until the car is pretty substantially modded. There are features that can come in handy when doing certain mods but if you are thinking of "improving the spark for efficiency" or the like then you are wrong and about to waste money.
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Old Apr 9, 2008 | 06:10 PM
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The stock ignition really doesn't need any help until the car is pretty substantially modded
This is true, but I did to my car because; the MSD 6/digital 6 are relatively cheap, I learned some things about the ignition system of my car ( replaced wires plugs) and I enjoy modding my car Art
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Old Apr 9, 2008 | 09:03 PM
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The motor has been modd with a 306 com cam.1.6rocker.58mmTB,intake.headers,push rods.cc value springs.full MSD set up,ported stock heads,3in MAS,LT4 SCM.so my motor is not stock.This is why I ask if I can run a ignition box on a stock opit.
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Old Apr 9, 2008 | 09:10 PM
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i have a 6al and stock opti but installed them both at the same time...working fine been about 13k...its just one of those things knock and wood and go for it...
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Old Apr 9, 2008 | 09:51 PM
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I have a gm replacement opti and Msd dif6 box and blaster coil with no ill effects.
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Old Apr 9, 2008 | 11:00 PM
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haven't had a problem with my setup; msd 6al, blaster coil & msd wires and I haven't had a problem !
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Old Apr 9, 2008 | 11:19 PM
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i think i heard somewhere that the blaster coil ***** up the opti i just have the 6al no problems..
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Old Apr 10, 2008 | 09:26 AM
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Originally Posted by 95hawk467
I have a gm replacement opti and Msd dif6 box and blaster coil with no ill effects.
Same here, 6A box and upgraded coil for years. I switched to the 685 box only because I added nitrous and needed more features. MSD 6A is for sale if your interested.
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Old Apr 10, 2008 | 10:22 AM
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Have yet to see any concrete evidence that an ignition box destroys the opti.
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Old Apr 10, 2008 | 10:29 AM
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Every stock cap that I have personally seen showed signs of arcing when it was run with an ignition box. I don't know if it would have still showed the signs of arcing without an ignition box but I thought i'de just throw that out there.
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Old Apr 10, 2008 | 11:16 AM
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yea stock ignition is fine but I was young and it was affordable. it will help later on with a FI setup..... a lot later on. lol
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