94 LT1 Optispark Replacement
Thread Starter
Teching In
Joined: Jan 2018
Posts: 24
Likes: 3
94 LT1 Optispark Replacement It has been a long time since I needed to replace the optispark on my 94 Z28.
What are the best options out there now? 10 years ago it was delco with mitsubishi sensor, but with delco quality changing with suppliers is that still the case?
What are the best options to stay with the early spline drive setup? Is there a quality rebuilder? Downtime doesn't matter for me - the car is high on a lift.
Last time I tried parts store versions and they were less than adequate and generated a bunch of rework for me.
What are your suggestions?
What are the best options out there now? 10 years ago it was delco with mitsubishi sensor, but with delco quality changing with suppliers is that still the case?
What are the best options to stay with the early spline drive setup? Is there a quality rebuilder? Downtime doesn't matter for me - the car is high on a lift.
Last time I tried parts store versions and they were less than adequate and generated a bunch of rework for me.
What are your suggestions?
Launching!
Joined: Mar 2022
Posts: 247
Likes: 32
AC Delco still seems to be the top in quality when it comes to Optispark units. According to the records for my car when the previous owner bought msd units, those went out within two years. I recommend gapping the spark plugs to 35 instead of stock 55 gap. I have a theory that even with acdelco (me dealing with my own optispark issues too) the large gap would cause a higher chance for the optispark to short itself out.
I also recommend buying an LTCC unit. Still utilizing the eye of the optispark and stock ecm. It basically converts it to coil on plug. Preventing the optispark from frying itself.
I also recommend buying an LTCC unit. Still utilizing the eye of the optispark and stock ecm. It basically converts it to coil on plug. Preventing the optispark from frying itself.
Staging Lane
Joined: Feb 2014
Posts: 68
Likes: 1
I replaced mine with a reman AC Delco from Rock auto in 2016. Already had to replace it again this year after maybe 6000 miles.
I went the same route but had to return the new one as it was clearly defective.
So, I think the Delcos are as much if a crap shoot as the rest of them now. Next time around I’ll try Petris if I don’t go the full TorqHead route.
Jon
I went the same route but had to return the new one as it was clearly defective.
So, I think the Delcos are as much if a crap shoot as the rest of them now. Next time around I’ll try Petris if I don’t go the full TorqHead route.
Jon
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It has been a long time since I needed to replace the optispark on my 94 Z28.
What are the best options out there now? 10 years ago it was delco with mitsubishi sensor, but with delco quality changing with suppliers is that still the case?
What are the best options to stay with the early spline drive setup? Is there a quality rebuilder? Downtime doesn't matter for me - the car is high on a lift.
Last time I tried parts store versions and they were less than adequate and generated a bunch of rework for me.
What are your suggestions?
What are the best options out there now? 10 years ago it was delco with mitsubishi sensor, but with delco quality changing with suppliers is that still the case?
What are the best options to stay with the early spline drive setup? Is there a quality rebuilder? Downtime doesn't matter for me - the car is high on a lift.
Last time I tried parts store versions and they were less than adequate and generated a bunch of rework for me.
What are your suggestions?
https://www.ebay.com/fdbk/feedback_p...IVED_AS_SELLER
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Verdad Gallardo Bought a brand new GM OEM Opti from this guy last year and paid a hefty price for it. Still have it and never installed it. He repaired optisparks that had Mitsubishi sensors or replaced optis with mitsubishi sensors when they were available. Couldn't hurt to give this guy a shoutout if he's still around. I actually regret throwing out my old optis back then. Who knew they could be refurbished.
https://www.ebay.com/fdbk/feedback_p...IVED_AS_SELLER
https://www.ebay.com/fdbk/feedback_p...IVED_AS_SELLER
On The Tree
Joined: Mar 2012
Posts: 114
Likes: 7
From: Sarasota FL
It looks like Petris has some in stock again...he's been having supply issues for awhile.
I put a Petris one on my Z28 back in late June and its been perfect. I'm actually doing a 0411 PCM swap next month, so my Opti will end up being nothing more than a cap and rotor shortly, as the PCM swap doesn't need the opti signal.
I put a Petris one on my Z28 back in late June and its been perfect. I'm actually doing a 0411 PCM swap next month, so my Opti will end up being nothing more than a cap and rotor shortly, as the PCM swap doesn't need the opti signal.
