Absolutely great write-up.  My 92 has developed a high rpm miss and I know I need to swap out the opti-spark.  I've been dreading doing the job but after reading through your project and studying the pictures I ordered the parts today.  Thanks again!

hello, i was wondering does the l98 engine have the optispark i have an 1985 vette, THANK YOU

[QUOTE=msledge50]hello, i was wondering does the l98 engine have the optispark i have an 1985 vette, THANK YOU[/QUOTE]

Lucky for you, no, you're L98 does NOT have the dreaded opti

You're still using an old-school distributor.  It's much easier to access and service if anything ever goes wrong with it and it's far more reliable too due to the fact it's not as exposed to dirt, grease water/coolant like the opti-spark is.
Hope that answers your question. 
LT1*C42010-01-06 22:52:58

Yes it does answer my question and thanks alot. I had many sports cars but this is my first vette, its a 85 with 47,000 miles on it and it looks great inside and out it has the z51 package and i put the k&n filter on it with mufflers eliminators it has 3:07's in the rear, its a automatic, the air cleaner cover the middle is cut out so its open it has the original cat but i do plan to get a free flown one and i was thinking of getting a shift kit for my trans,Can you suggest some other minor mods that i can gain power just minor ones THANKS. msledge502010-01-07 16:01:29

Very nice job with all of the photo's.  I just had a shop here in GA. replace the Opti in my 96 LT-4, they put an Accel unit in as well as a new w. pump, mucho deniro, but you can't go anywhere with no spark!  Good job-Phil

Thanks Phil for the terrific write up and pictures. All of your helpful hints are invaluable

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This is great stuff.  Thanks for sharing.  I have a 93 that I know I will be replacing the opti spark soon.  When I first bought the car 3 years ago I decided to wash down the engine compartment.  Bad move on my part.  3 Days later the car started.
Anyway I also get that slight hesitation when it first starts up.  Will follow your guidelines once I get the balls to dive into the project.

Mike

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Good job and thanks for taking the time to share. The photos and description are much better than the few cryptic instructions from my factory manual.  I will have to do this job soon myself. Thanks!

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There is no problem a little horsepower can't fix!

https://www.c4vetteregistry.com/member_uploads/14301_14400/14327/100_5963_zpse01892a52014510161358r.jpg

Great write up. Should be very helpful to many. Should be a "Sticky"

Are these "Opti Spark" modules that sensitive to water? Can I power wash my engine without much concern?

[QUOTE=RonRock]Great write up. Should be very helpful to many. Should be a "Sticky"

Are these "Opti Spark" modules that sensitive to water? Can I power wash my engine without much concern?
[/QUOTE]

I put in three OPTi sparks in 12,000 miles. The last one only lasted about 1000 miles. I did away with the optispark and put in a MSD ignition. It cost me a little bit but I plan on keeping the car and driving it. It is a 94 with only 92,000 miles on it. The car has run better now than it has ever run since I had it. OK, it may not be original now, but it is not going to leave me sitting on the side of the road again. I have been sitting on the side of the road. At least a half dozen times.  I could drive it and it would just shut off. Sometimes it would crank right back up. I could try to crank it every day for 2 weeks and it would not start. The next day I go out there it starts and runs fine. The next day I get in it, it turns over and doesn’t start. That’s why I went with the MSD ignition. Got rid of that problem.

|UPDATED|12/28/2022 10:11:26 AM (AZT)|/UPDATED|


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