Cardone 84-1832 New HEI Electronic Distributor and Module, New Engineered Technology, Ensures Proper Form, Fit and Function, Compatible with Chevrolet, Pontiac, Model Years

Works perfect

So far I'm 100% satisfied

Lasted less than a year

It arrived with a crooked pin on the harness and after fixing that and installing it still had a code 16 bad high res signal and had to remove it, I wish I tested it before installing by hand spinning it plugged in. The harness wires appeared to be a smaller gauge wire. It looked good but wasn't, the old one still worked so I reused it. Credit was issued 1 day after returned.

I got this to replace the original opti-spark on a 1992 Corvette at 60,000 miles. The original one had a noisy bearing but was still working. I have heard many scary stories about aftermarket opti-spark units not working at all but originals are hard to find and not cheap. I decided to try my luck with this one. It works great, engine runs very smooth. I disassembled it completely and sealed all the interfaces with Three Bond 1184 and put locktite on all the screws. 1184 is a soft curing sealant resistant to gas/oil, similar to Yamabond 4. There are gaskets under the cap and the housing to the aluminum but there are wide openings around where the electrical plug goes into the unit. Since that is near the top once installed any moisture could run right into the interior of the unit. I wanted it completely sealed to prevent water intrusion. It does have the three vents at the bottom like the stock one did to vent ozone. I did not do any vent mod like the later versions of the opti-spark have since the original lasted 60,000 miles un-vented. I have a few hundred miles on it and its working great. Seal it up before you install it.Update: 3,000 miles on it now and no problems.

Honestly this is in my opinion the most economical option for a replacement Opti!GM quit making new optisparks so what to do when the time comes? I acquired a '94 Firehawk that had not run in ten years because the Opti died when the water pump leaked. I did quite a bit of research and settled in on the Cardone new opti. Biased primarily because GM is offering only "rebuilt" now. Which I suspect translates to the best cores are remanufactured as AC Delco I'm personally not 100% convinced that these get NEW Mitsubishi sensors. So I wasn't comfortable paying top dollar for a very limited warranty.I received the Cardone unit quickly and well packaged the Cardone cap is well sealed to the body. But I really wanted to address the other issue I see optisparks and that is the ozone corrosion issue and that means adding a vent system. I used a MSD cap and rotor. On this item. Once I had the cap and rotor off I checked the pick up wheel and found just a slight bit of run out, maybe a few thousands, which I gently brought back into shape. The MSD parts fit perfectly on the Cardone and install was uneventful. The parts were buttoned up with new seals on the timing cover and the LT1 took her first breath in 10yrs after a few cranks to get fuel up. After that she fires with just a touch of the key. Very pleased. Of course time will tell. But I have no reason to not believe this will be a good unit for a long time. I've long suspected people who are happy don't complain on message boards. Just the ones who aren't. Keep that in mind as you research your best option for your engine.

Bought this unit for my 93 corvette 11 months ago it’s been working great on my daily ish drive car I’ve sat in traffic for hours each day for months and no issues!!

It works fine, but You have to modify by shave the square alignment notch with a dremel tool. The square notch is above the spindle. This step must be done in order to seat the OptiSpark properly against the engine on a LT1 - C4 Corvette engine.

Vorab, es sind erst knapp zwei Monate, seit ich den Verteiler verbaut habe, eine wirkliche Langzeiterfahrung ist dies hier also nicht. Vom Vorbesitzer war zwei Jahre vorher ein teurerer, wohl original GM Optispark, der von ebenfalls Cardone als überholtes Austauschteil gekauft worden war, verbaut, dieser hatte aber eben nur zwei Jahre, bzw. ca. 18.000 km gehalten und hatte dann ein thermisches Problem. Dieser hier macht einen sehr wertigen Eindruck und, falls ich mir dies nicht einbilde, läuft damit der LT1 Motor meiner 1992er C4 auf Anhieb sehr smooth und verbraucht definitiv etwas weniger Benzin, als vorher. Das Verbauen in der Corvette ist im Übrigen auch kein Hexenwerk, Kühlmittel am Auslauf ablassen und auffangen, Keilrippenriemen, Wasserpumpe und Schwingungstilger abbauen, schon liegt der Optispark frei, also nur Mut!

Works good