C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

93 started to run like crap

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Old Dec 13, 2012 | 11:59 PM
  #21  
dizwiz24's Avatar
dizwiz24
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Originally Posted by Paul Henriques
hey dizwiz24 so what do you think about this, http://www.delteq.com it cost about $700and never have to worry about the OPTI-Spark let me know your thoughts,
Thanks !
I've heard of those, but no experience with it. My issue with those is they still require a working optispark (for the sensor portion of the circuit).

The thing about the optispark is its a good concept. Very accurate timing control (no base timing to go out of tune or anything like that). I've heard of people spinning it to 8000+ rpm and it still works (though the ecm computer needs upgraded beyond 7k from what I hear).

Only use acdelco new old stock optispark. Expensive, but I've heard total horror stories of the ebay cheapos. The part takes too much work to replace and is mission critical

If you put a new optispark in there, be sure to vent it so you attain the reliability of the 95 and 96 model year units.

If you buy a 95-96 cap. It has a vent hole in it to accept a vent harness. Put the vac line into the cap and the air input line into one of the 3 weeepholes (may need to drill the weephole out some). Block off the other two weepholes.

Essentially the vent keeps a gentle flow of air circulating through the optispark to remove any contaminants (carbon or water - from a broken seal).

Vent harness has a vaacuum linne, and air input line. It also has a flow reducer and check valve. These are still available. Someone should have the p/n

Last edited by dizwiz24; Dec 14, 2012 at 12:03 AM.
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Old Dec 19, 2012 | 09:38 PM
  #22  
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Hey every one just wanted to give an update it was the OPTI-Spark it was too much work for me and dint really have the time so I had Tonys corvette shop do it, it cost me about $1800 the dealer wanted $2200 to do the same work, well thanks for everyone's help!
See you on the next one!
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