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

Optispark!?

Old Sep 10, 2018 | 06:09 PM
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Default Optispark!?

Yet another optispark post. I bought the 65 dollar one from amazon and I'm now paying for it. Car makes no power, spark is not the right color and just overall drives and accelerates like turd. Which opti is the best?
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Old Sep 10, 2018 | 07:17 PM
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Optidoctor on Ebay or PM on here. Very top quality units but not 65 bucks.
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Old Sep 11, 2018 | 08:17 AM
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Originally Posted by 92ZF6
Yet another optispark post. I bought the 65 dollar one from amazon and I'm now paying for it. Car makes no power, spark is not the right color and just overall drives and accelerates like turd. Which opti is the best?
AIP unit from Sac City corvette, 2yr warranty, not $65 but not $500 either.
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Old Sep 12, 2018 | 09:57 PM
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I put a vented Petris in my 94, has been rock solid...not cheap though. It replaced an MSD that someone installed incorrectly and without locktite. Whatever you choose, do it right.
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Old Sep 13, 2018 | 01:14 PM
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Originally Posted by pacoW
AIP unit from Sac City corvette, 2yr warranty, not $65 but not $500 either.
This. Just picked one up from them. There's someone in the FS section selling one for $75; I'd go that route.

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Old Sep 16, 2018 | 02:12 PM
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Originally Posted by pacoW
AIP unit from Sac City corvette, 2yr warranty, not $65 but not $500 either.
Sorry, my time/labor is worth more than what i save with this optispark (and its non mitaubishi sensor) vs. optidoctor’s optisparks (or an oem unit if you get lucky and find one).
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Old Sep 16, 2018 | 02:35 PM
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SO opti doctor is the way to go? Ordering whatever I'm going to order this coming Friday
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Old Sep 16, 2018 | 08:16 PM
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Originally Posted by dizwiz24


Sorry, my time/labor is worth more than what i save with this optispark (and its non mitaubishi sensor) vs. optidoctor’s optisparks (or an oem unit if you get lucky and find one).
I agree!!!! Talk with Brad. If you have a Mitisibusi sensor used unit he can rebuild. If not buy one from him and throw your Chinese sensor in the trash. Be done with it for a long time.
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Old Sep 23, 2018 | 11:13 AM
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WHat does he rebuild. Inside is a sensor, wheel, cap.
Hardest part about the opti is taking it down, as you need a reverse torx bit.
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Old Sep 23, 2018 | 06:32 PM
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Beadblast the plate, install new bearing, check wheel for flatness, clean sensor, new MSD cap and rotor, loctite screws, seal case with a special gummy sealant and test.
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Old Sep 23, 2018 | 06:33 PM
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Originally Posted by Whaleman
Beadblast the plate, install new bearing, check wheel for flatness, clean sensor, new MSD cap and rotor, loctite screws, seal case with a special gummy sealant and test.
Okay. Cost for one 95/96 model with my core, if you do that.

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Old Sep 23, 2018 | 08:55 PM
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I am not the optidoctor. It depends if your sensor is mitsubusi or not. You can PM him on this site or send a message to him on ebay.
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Old Sep 23, 2018 | 08:58 PM
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https://www.ebay.com/itm/Optispark-r...0AAOSwVm5ZARQg
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Old Oct 7, 2018 | 11:58 AM
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I just had a 96 vented Opti fail. I lost both the high and low resolution signals. It just stopped working when I was waiting at a stop light. There was no indication of any problem prior to the failure. This is a GM OE (Delphi?) that is 13 years old with 7000 miles. I have not taken this one apart yet to inspect the internals.

The original Opti that was installed when the car was built lasted 10 years with 40,000 miles. That one stopped sending the high resolution signal. The inside of this one was clean and dry.

I seem to have bad luck even with the Mitsubishi sensor.

Last edited by Warren Seale; Oct 7, 2018 at 12:00 PM.
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Old Oct 7, 2018 | 12:11 PM
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Heat is a huge factor in electronics as we all know. The Opti is in a very hot environment.
Maybe set up a duct that brings fresh cool air to it, via AC system we all use whenever driving on sunny days only..
Seriously, I am sure Mitsubishi made great stuff in the 80's, as this part came from the eclipses. But, that was the 80's
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Old Oct 12, 2018 | 09:47 AM
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From what you posted I would suspect a weak coil.
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Old Oct 14, 2018 | 08:58 AM
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Originally Posted by 64Scout
From what you posted I would suspect a weak coil.
….. I agree … the Opti Spark distributor has no contribution to the strength of the spark … it merely provides the data for the occurrence and timing of spark and the distribution of the spark via the cap and rotor …..
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