Opti eliminating
Thread Starter
Pro
Joined: Jul 2014
Posts: 642
Likes: 11
Opti eliminating
Just picked up a very nice 95 with 83K on the clock, even tho the 95s are vented keep thinking about the "WHAT IF IT GOES BAD
With that in mind the question becomes an upgraded unit such as the DELTEG replacement and wondering if anyone here has done the conversion..............0
With that in mind the question becomes an upgraded unit such as the DELTEG replacement and wondering if anyone here has done the conversion..............0
Safety Car
Joined: Apr 2016
Posts: 4,648
Likes: 1,059
From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
Do you mean Delteq ? The website is still up, being funded on autopilot, but no one is home. I tracked down the owner using tools to find who owns a website, sent an email, got a response, then he went back into hiding and won't answer anymore emails.
Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
Delteq is no more. LTCC conversion is great but still relies on optical sensor in opti for input.
The only true plug and play way to get rid of the opti entirely is the Torqhead conversion which has been out for the F-Bodies for a while now and soon our LT1 C4's. It gets rid of the LT1 PCM entirely and uses a new LS1 tuner friendly PCM. I would hold out for that. As soon as it comes online I will probably be an early adopter as I love the stoutness/reliability of my LT1 but want the more fool proof ignition and PCM of the LS1 Cars.
The only true plug and play way to get rid of the opti entirely is the Torqhead conversion which has been out for the F-Bodies for a while now and soon our LT1 C4's. It gets rid of the LT1 PCM entirely and uses a new LS1 tuner friendly PCM. I would hold out for that. As soon as it comes online I will probably be an early adopter as I love the stoutness/reliability of my LT1 but want the more fool proof ignition and PCM of the LS1 Cars.
Instructor
Joined: Nov 2012
Posts: 240
Likes: 18
From: Carrollton Illinois
On torqhead's website you can choose Y-body as the type of platform so it may be compatible now.
http://www.torqhead.com/buy-24xlink-...egory=14327802
http://www.torqhead.com/buy-24xlink-...egory=14327802
Le Mans Master
Joined: Feb 2005
Posts: 6,475
Likes: 565
From: Clearwater Florida
..... Whatever replacement method there is , you need to provide the ECM with cam and crank synch signals and a method to distribute the spark to each cylinder ... I have a Holley Dominator Controller with a FAST Dual-Synch distributor , valve cover mounted LSx Coils , and sequential fuel injection on a Gen 1 SBC ... the LT1 in the Corvette chassis adds to the difficulty but its doable ... just need to provide the signals ... and an ECM that can interpret them .....
Last edited by C409; May 16, 2017 at 08:02 AM.
Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
..... Whatever replacement method there is , you need to provide the ECM with cam and crank synch signals and a method to distribute the spark to each cylinder ... I have a Holley Dominator Controller with a FAST Dual-Synch distributor , valve cover mounted LSx Coils , and sequential fuel injection on a Gen 1 SBC ... the LT1 in the Corvette chassis adds to the difficulty but its doable ... just need to provide the signals ... and an ECM that can interpret them .....
Thread Starter
Pro
Joined: Jul 2014
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Torqhead does all of this with a hub, reluctor wheel, and crank sensor. All LS1 Components and he modifies the LS1 PCM to accept the LT1 PCM connectors. Everything is plug and play and it communicates with the CCM in cabin. Everything works as it did from the factory, all plug and play, no splicing, soldering, etc...
So are these units available if so where is the resource?
Safety Car
Joined: Aug 2002
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From: SANTA CRUZ CA
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Safety Car
Joined: Apr 2016
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
I am going to contact them and ask about diagnostics. What do you tell the diagnostic tool that you are dealing with ? If it tries to communicate with an LT1 ECM, it is not there any more, and vice versa.
Drifting
Joined: Aug 2009
Posts: 1,970
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Not an opti eliminator but the LTCC kit someone mentioned above is a phenomenal piece of hardware. I've had it on my car for years and it has worked flawlessly. It eliminated ignition gremlins for me by eliminating the ICM, stock coil, and the use of the high voltage side of the opti. Remember, OEM Optis have the Mitsubishi sensor which has proven very reliable and that piece of the opti is what the LTCC relies on. I've been very happy with my setup.
Safety Car
Joined: Apr 2016
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
I received an answer to the email I sent. The next step is to contact OTC and explain what is proposed and see if their diagnostic tools will still interface. The OTC Nemisys that I have goes through steps as to year make model, engine etc before it connects to the car.
Hi David,
Nice to meet you.
Since you have a 1996 LT1 Corvette you currently have a OBD2 PCM. As such your current diagnostic tool reads OBD2. The LS PCM is also OBD2 as well, so the diagnostic tool will still work very well. My guess is that it can tell, on some level, the PCM it is connected to and the available PID’s that can be displayed as well as reading codes. I doubt you will have to do anything for it to start doing its thing as normal. Once you move to the LS OBD2 PCM any and all GM tuning software and diagnostic tools will function very well with it. This includes HP Tuners, EFI Live, and your OTC Nemysis.
Regards, Paul
Owner/Product Designer
Nice to meet you.
Since you have a 1996 LT1 Corvette you currently have a OBD2 PCM. As such your current diagnostic tool reads OBD2. The LS PCM is also OBD2 as well, so the diagnostic tool will still work very well. My guess is that it can tell, on some level, the PCM it is connected to and the available PID’s that can be displayed as well as reading codes. I doubt you will have to do anything for it to start doing its thing as normal. Once you move to the LS OBD2 PCM any and all GM tuning software and diagnostic tools will function very well with it. This includes HP Tuners, EFI Live, and your OTC Nemysis.
Regards, Paul
Owner/Product Designer
Last edited by drcook; May 16, 2017 at 06:26 PM.
Melting Slicks
Joined: Jan 2017
Posts: 2,099
Likes: 47
From: Minneapolis MN
Ok, I'm way over my head as the brain can think to about the L48 era. So, I have a 92 LT1 with an Auto. What exactly do I need in order to replace (****-can) the Opti. Prices range from around $600 to almost $2,000. What gives?
Melting Slicks
Joined: Jul 2011
Posts: 2,605
Likes: 202
From: Trinity FL
Not an opti eliminator but the LTCC kit someone mentioned above is a phenomenal piece of hardware. I've had it on my car for years and it has worked flawlessly. It eliminated ignition gremlins for me by eliminating the ICM, stock coil, and the use of the high voltage side of the opti. Remember, OEM Optis have the Mitsubishi sensor which has proven very reliable and that piece of the opti is what the LTCC relies on. I've been very happy with my setup.
Safety Car
Joined: Apr 2016
Posts: 4,648
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
The other reason I am looking into communications with the LSx PCM is emission checking. I live in an area with mandatory EPA emission checking. If their computers cannot talk to the PCM via the OBDII port, they will attempt a sniff test (I believe, at least this is the way it was with my diesel pickup, which is an 04 1/2, not an 04, identified by a nbr in the VIN). I think when the software asked them (the them are not very technically astute folks running the EPA checking station and not highly paid) whether it was a Vin 1 or a Vin 2, they probably said Vin 1. One day I reminded them it was an 04.5 and a Vin 2 and their computers magically started reading through the OBD port.
While Torqhead product is really cool and the optimum fix for the Optispark, if the car would fail EPA checking and not be able to get a new license, then the LTCC unit is the way to go.
The other advantage the T-H product has is tuning. I recently found out (had a thread about it) that it is really hard to find someone to tune a 96 LTx car, at least here in my area of Ohio. Most people told me they don't have the necessary componentry anymore (or never had).
While Torqhead product is really cool and the optimum fix for the Optispark, if the car would fail EPA checking and not be able to get a new license, then the LTCC unit is the way to go.
The other advantage the T-H product has is tuning. I recently found out (had a thread about it) that it is really hard to find someone to tune a 96 LTx car, at least here in my area of Ohio. Most people told me they don't have the necessary componentry anymore (or never had).
Last edited by drcook; May 16, 2017 at 09:06 PM.
Melting Slicks
Joined: Jan 2017
Posts: 2,099
Likes: 47
From: Minneapolis MN
The other reason I am looking into communications with the LSx PCM is emission checking. I live in an area with mandatory EPA emission checking. If their computers cannot talk to the PCM via the OBDII port, they will attempt a sniff test (I believe, at least this is the way it was with my diesel pickup, which is an 04 1/2, not an 04, identified by a nbr in the VIN). I think when the software asked them (the them are not very technically astute folks running the EPA checking station and not highly paid) whether it was a Vin 1 or a Vin 2, they probably said Vin 1. One day I reminded them it was an 04.5 and a Vin 2 and their computers magically started reading through the OBD port.
While Torqhead product is really cool and the optimum fix for the Optispark, if the car would fail EPA checking and not be able to get a new license, then the LTCC unit is the way to go.
The other advantage the T-H product has is tuning. I recently found out (had a thread about it) that it is really hard to find someone to tune a 96 LTx car, at least here in my area of Ohio. Most people told me they don't have the necessary componentry anymore (or never had).
While Torqhead product is really cool and the optimum fix for the Optispark, if the car would fail EPA checking and not be able to get a new license, then the LTCC unit is the way to go.
The other advantage the T-H product has is tuning. I recently found out (had a thread about it) that it is really hard to find someone to tune a 96 LTx car, at least here in my area of Ohio. Most people told me they don't have the necessary componentry anymore (or never had).
EPA emission checking on a 20 + year old car? So EPA emission checking would be required on a 1955 Chev too?
Race Director
Joined: Sep 2001
Posts: 14,659
Likes: 749
From: NEwhere Ohio
Just picked up a very nice 95 with 83K on the clock, even tho the 95s are vented keep thinking about the "WHAT IF IT GOES BAD
With that in mind the question becomes an upgraded unit such as the DELTEG replacement and wondering if anyone here has done the conversion..............0
With that in mind the question becomes an upgraded unit such as the DELTEG replacement and wondering if anyone here has done the conversion..............0
there are people here who will 'proactively replace' a working fine oem gen2 unit with a chinese optispark because they heard optisparks fail, then will have problems with the new non oem unit they installed).
no need to eliminate this piece of equipment. you can still find nos optisparks if you know what to look for (mitsubishi sensor).
dont be the fool that wants the $500 msd optispark that so many people here have trouble with.
heres one i found on ebay. genuine nos
http://m.ebay.com/itm/LT-1-Distributor-Optispark-NEW-GM-not-rebuilt-Its-the-holy-grail-of-Optisparks-/322514628328?hash=item4b175eaee8%3Ag%3AS fMAAOSwIQdZFhDe&_trkparms=pageci%253A702 6f847-3aab-11e7-aa0d-74dbd1803c13%257Cparentrq%253A144f603a15 c0aa415d6f2132fff9098a%257Ciid%253A4
Safety Car
Joined: Apr 2016
Posts: 4,648
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From: N.E. Ohio OH
Finalist 2020 C4 of the Year - Modified
SO Yes.
Do you think I would post that up if it weren't true ? In 2022 I do not have to have the car checked again. Actually it is every other year. On odd years, they do odd year cars and on even years, even. Also, regardless of year (odd/even/25 yrs or less) every time a car changes hands, it gets E-checked. Only cars that are new up to a couple years old are exempt.
We have to go to the facility, they do a visual and then machine inspection before issuing a certificate that you take with you to go get your license plates on the annual renewal.
No certificate, no plates.
http://epa.ohio.gov/dapc/mobile.aspx
there are ways around it, collector plates is one. you have to go through the steps to get them
I also want to know if I get a check engine light, that I can connect up to and diagnose the issue.
Last edited by drcook; May 16, 2017 at 11:11 PM.
Le Mans Master
Joined: Aug 2015
Posts: 6,086
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From: St. Charles MO
FWIW, in three counties in MO, they scan all OBD2 cars regardless of age. And there is no option for a tailpipe sniff test. If the scanner doesn't find the expected stock PCM, you don't pass. It doesn't matter if your car meets emissions standards at the tailpipe. So I don't see any way that a 96 C4 could pass with the LS computer.