LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Decision Support Needed: Opti Replacement

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Old Oct 4, 2010 | 09:46 PM
  #1  
Paul94Z28's Avatar
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Decision Support Needed: Opti Replacement

It looks like I need to replace my opti. So what is the best option?

The local parts store has a new one for $180. I can get a MSD with low miles for $300 from here.

What would you recommend? I have heard good and bad luck with all options. This is an earlier unvented spline model btw.

Any advice appreciated.

Thanks,

Paul
Old Oct 4, 2010 | 09:57 PM
  #2  
englundjd's Avatar
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well what brand is the parts store selling? personally i would trust an MSD or OEM replacement more
Old Oct 4, 2010 | 11:28 PM
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Parts Store

BTW or something like that...
Old Oct 4, 2010 | 11:44 PM
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id stick with an oem opti, ive read that the msd optis arent all that great for the money, but dont know this from experience. i can tell you that i had an accel opti that lasted about a year, get a good old ac delco.
Old Oct 5, 2010 | 12:15 AM
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I have a MSD opti and I think it is causing my miss on cylinders 7 and 8. It seems to hold up and not fall apart all together like a lot of others have done on my car in the past. I am going to get a replacement, because I have not had it for a year yet. For the money I will say go for the OEM opti; make sure the rotor screws are put in with high strength loctite, they like to back themselves out.
Old Oct 5, 2010 | 12:54 AM
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Or you can ditch the whole works and go with a Delteq like I plan once I convert the carb LT1 to FI. I'd go with an OEM versus aftermarket, though. You usually get what you pay for.
Old Oct 5, 2010 | 08:18 PM
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Oem?

So what are we calling OEM?

I thought these were no longer made by ac delco...
Old Oct 5, 2010 | 09:08 PM
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Delphi is the OEM supplier.
Old Oct 5, 2010 | 10:50 PM
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Originally Posted by Colin
Or you can ditch the whole works and go with a Delteq like I plan once I convert the carb LT1 to FI. I'd go with an OEM versus aftermarket, though. You usually get what you pay for.
Is Delteq back in business? They dropped off the face of the earth about 3 years ago. And, the system was far from reliable, with major, unexplained problems on random cars, that caused the designer/manufacturer to admit that it just wouldn't work on all vehicles. With no replacement parts avialable, it would be a real crap shoot to install it.
Old Oct 6, 2010 | 03:07 PM
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What about the Dynaspark? They still around?
Old Oct 6, 2010 | 05:00 PM
  #11  
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Dnyaspark is around as of August 2010, got mine after a four month wait to get it. http://www.dynaspark.net/
Old Oct 6, 2010 | 07:45 PM
  #12  
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New AC Delco - no questions asked. And buying a used optispark is always a risk.
Old Nov 9, 2010 | 08:17 PM
  #13  
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Re: Decision Support Needed: Opti Replacement

Where can I get a GM Performance spline drive Optispark? Looks like summit only has their brand in the spline drive style...
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