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

ignition mod on lt1

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Old Sep 7, 2009 | 05:30 PM
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Default ignition mod on lt1

what is the mod system called with the coil packs for the lt1? im thinking delphi or something. if you have pics please send. thanks
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Old Sep 7, 2009 | 05:41 PM
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There is the LTCC setup that uses LS1 coils, and the Delteq that uses Northstar coils. I have the LTCC setup on my car and I've had very good results. I like LTCC because it uses LS1 coils, which are used on LS1's, as well as all the truck engines. They are cheap and very, very reliable, as well as providing plenty of spark for almost any combo.

http://www.bailey-eng.com/LTCC.html
http://www.delteq.com/
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Old Sep 7, 2009 | 05:57 PM
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Originally Posted by Mojave
There is the LTCC setup that uses LS1 coils, and the Delteq that uses Northstar coils. I have the LTCC setup on my car and I've had very good results. I like LTCC because it uses LS1 coils, which are used on LS1's, as well as all the truck engines. They are cheap and very, very reliable, as well as providing plenty of spark for almost any combo.

http://www.bailey-eng.com/LTCC.html
http://www.delteq.com/
yea thats the system, do you still have to have an opti but not using it or is there a cover for the opti,how does that work, and can you use an ignition box with this system?
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Old Sep 7, 2009 | 06:34 PM
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EFI makes a kit as well using the LS1 coils and PCM. It also eliminates the Opti completely which is replaced by a new reluctor and sensor. Looks a bit pricey, but then I haven't fully priced them all out yet.

http://www.eficonnection.com/24x/default.htm
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Old Sep 7, 2009 | 07:12 PM
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Originally Posted by jimg's'93
EFI makes a kit as well using the LS1 coils and PCM. It also eliminates the Opti completely which is replaced by a new reluctor and sensor. Looks a bit pricey, but then I haven't fully priced them all out yet.

http://www.eficonnection.com/24x/default.htm
so if you do away with the opti completely ill have to have one of these?
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Old Sep 7, 2009 | 07:53 PM
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So you can do away with the opi????
That would be great
What would the total cost be for everything does anyone know?
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Old Sep 7, 2009 | 07:54 PM
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The opti would be replaced by these parts:



Otherwise, besides what I've learned from the website, I'm not that familiar with the installation.
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Old Sep 7, 2009 | 11:19 PM
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Originally Posted by bigwave71
yea thats the system, do you still have to have an opti but not using it or is there a cover for the opti,how does that work, and can you use an ignition box with this system?
With LTCC and Delteq, you need the opti for the optical signal for the computer. I don't think you can use an ignition box with either, and I don't know why you would. The LTCC has a built in rev limiter and nitrous retard. The LS1 coils produce plenty of spark to make lots of power, so I don't see what you would really gain with any kind of ignition box.

An LS1 computer swap is the ultimate solution, eliminating the opti all together. It is quite a bit more work, with mods to the timing cover (meaning the oil pan has to come down), and dealing with getting the new computer tuned for your engine (I doubt a stock LS1 tune will get right). That said, if you're willing to spend some time/money, you'll get a better computer that's easier to tune and more tunable, as well as a no opti and 8 coil controlled directly by the computer.
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Old Sep 7, 2009 | 11:22 PM
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Originally Posted by Mojave
An LS1 computer swap is the ultimate solution, eliminating the opti all together. It is quite a bit more work, with mods to the timing cover (meaning the oil pan has to come down), and dealing with getting the new computer tuned for your engine (I doubt a stock LS1 tune will get right). That said, if you're willing to spend some time/money, you'll get a better computer that's easier to tune and more tunable, as well as a no opti and 8 coil controlled directly by the computer.
and you'll definately need a new computer tune.
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Old Sep 8, 2009 | 12:01 AM
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great thanks for all the info.
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Old Sep 8, 2009 | 09:44 AM
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Is there any performance advantage to changing over to this system? The reason I ask is because the Opti only costs about $75 and a water pump is about the same, so for $150 and abut 2 to 3 hours I can replace both(just did it Saturday). Doesnt seem worth the effort unless there is a huge performance advantage. That and it clutters up under the hood.
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Old Sep 8, 2009 | 02:20 PM
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Originally Posted by mnypitVette
Is there any performance advantage to changing over to this system? The reason I ask is because the Opti only costs about $75 and a water pump is about the same, so for $150 and abut 2 to 3 hours I can replace both(just did it Saturday). Doesnt seem worth the effort unless there is a huge performance advantage. That and it clutters up under the hood.
if you havent already bought the msd opti and a msd ignition box with built in rev limiter and retarder like i did then this would make a good ignition upgrade.
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Old Sep 8, 2009 | 02:57 PM
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Originally Posted by mnypitVette
Is there any performance advantage to changing over to this system? The reason I ask is because the Opti only costs about $75 and a water pump is about the same, so for $150 and abut 2 to 3 hours I can replace both(just did it Saturday). Doesnt seem worth the effort unless there is a huge performance advantage. That and it clutters up under the hood.
You've either got to let the forum in on where you shop, or start buying quality parts.
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Old Sep 8, 2009 | 03:10 PM
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Originally Posted by jimg's'93
You've either got to let the forum in on where you shop, or start buying quality parts.
Got em both off ebay. And as easy as the job was to do, in 3 or 4 years when they need to be done again, I am more than happy to do it again to save $700. The car that this psuedo replaced was driven maybe 2000 miles a year since I bought it. It accelerates without breaking up all the way to well past redline, actually further than I am comfortable taking a 154k mile LT1. So its not an MSD or the like, but it will be fine for me, being the origional non vented lasted this long.
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Old Sep 8, 2009 | 03:20 PM
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Originally Posted by jimg's'93
The opti would be replaced by these parts:



Otherwise, besides what I've learned from the website, I'm not that familiar with the installation.
You can't get the late timing covers from GM anymore

Also you'll need to piggy back in the stock computer to run the dash.
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