Help with optispark

[F.G.]

Hi everyone, I am in need of my LTX family's help. I am in the middle of an engine build and have been trying to find a good opti to use. I have been looking for AC delco and delphi units but can't seem to find any. Delphi seems to be discontinued and A.C. delco only has remanufactured units. I've also read that dynaspark wasn't good for a few years. Any updates on their quality? I was also looking into a 24x conversion but not only is it very expensive but the gauges and traction control malfunction on 92 and 93 vettes when using this system. I have contacted torqhead and they don't have anything for 92 and 93 vettes either. I am at a complete loss right now and really need to find a solution because the car is at a shop and the build is moving quickly. If anyone has any suggestions on a good aftermarket unit or a lead on ac delco or delphi optis please let me know. Also if anyone has a good opti they want to get rid of please let me know. Thank you all.

[BALLSS]

If I needed to buy a new opti today I would get the AC Delco reman

rockauto.com has them for $345 + $30 core

http://www.rockauto.com/en/moreinfo....041310&jsn=444

the $1xx ones are cheap...but hit and miss if they work

[F.G.]

If I needed to buy a new opti today I would get the AC Delco reman

rockauto.com has them for $345 + $30 core

http://www.rockauto.com/en/moreinfo....041310&jsn=444

the $1xx ones are cheap...but hit and miss if they work

That's what I was thinking. Maybe get the reman one and put an msd cap and rotor on for the vent. Hopefully it lasts until torqhead comes up with a solution for my year of car. According to the person I talked to they are hoping to have something available by late summer

[ElkySS]

I've been running an MSD opti for 7ish years. The rotor screws backed out once but that's the only issue it's ever had. But that can happen to any opti.

[F.G.]

Thank you, I've been thinking about an MSD opti as well. Decisions decisions

[popo8]

If I needed to buy a new opti today I would get the AC Delco reman

rockauto.com has them for $345 + $30 core

http://www.rockauto.com/en/moreinfo....041310&jsn=444

the $1xx ones are cheap...but hit and miss if they work

Thats all i use on all my lt1s. I was buying them from @American-Powerhouse until she stopped carrying them, but bothing wrong with the remaned ones.

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[popo8]

That's what I was thinking. Maybe get the reman one and put an msd cap and rotor on for the vent. Hopefully it lasts until torqhead comes up with a solution for my year of car. According to the person I talked to they are hoping to have something available by late summer

I wpuldnt even swap out the cap. Ive run vented amd unvented delco remaned optis with no issues. In fact they are nicely sealed from the factory with nice weather pack ends on the harness as well.

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[popo8]

Thank you, I've been thinking about an MSD opti as well. Decisions decisions

Im gonna be a nay sayer amd say dont do it. Had a billet msd opti that was the issue for a high rpm misfire... had msd rebuild it amd sold it upon return... then my ta came with a billet msd opti amd within a few weeks of having it... it was a no start... @Tubby Z28 i believe also had msd negative memories.

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[Injuneer]

MSD Opti’s built over the past two years or so have had problems with erratic signals from the optical cam position sensor. There’s a thread on here hilighting this problem and its symptoms. MSD claims they found the fix, but there's no evidence yet to support that. When the problem was prevalent, people were returning units to MSD for rebuild, and the rebuilds were having the same problem right out of the box.

At this point, it’s a matter of statistics - which one seems to have the lower failure rate. Based on tracking the problems on sites like this for 20 years, the AC Delco reman is not perfect, but it appears to be the best available. I would recommend the vented cap. The vent was added by GM to remove the ozone generated by the internal high voltage sparking. Ozone is highly corrosive, and accounts for the rust particles that can blind the optical emitter/receptor.

[fullforce]

Ive had my opti on for a year now from summit with no issues