LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

OPTI question

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Old Oct 8, 2005 | 12:19 AM
  #1  
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OPTI question

whats the difference in the vented and non vented opti's? i know that they both will fit on my 96, but im wondering if the vented is better. is there a better choice? thanks fellas
Old Oct 8, 2005 | 12:48 AM
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Re: OPTI question

a vented is the only direct replacement for a 96. the vented (gen 2) help with moisture build up that leads to opti failure.
Old Oct 8, 2005 | 02:01 AM
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Re: OPTI question

ahhhh i see... o and did anyone hear anything about the MSD opti coming out? last i heard it was just the cap...and rotor maybe...fill me in!
Old Oct 8, 2005 | 06:17 AM
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Re: OPTI question

I don't think MSD has any intent in making a complete opti, their cap & rotor kit was adverised long time (maybe a year) but the product is not out still.
Old Oct 8, 2005 | 08:15 AM
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Re: OPTI question

Yes, the MSD is a cap and rotor only and a few of them are just now starting to trickle out into the retail market.
Old Oct 8, 2005 | 04:52 PM
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Re: OPTI question

is there any way to upgrade my opti? or is there only direct replacements out there... just wondering
Old Oct 9, 2005 | 08:43 AM
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Re: OPTI question

The major failure with the opti is in the high voltage distributor side as apposed to the low voltage side behind it. In order to keep the plug wires on the correct side of the distributor cap(refered to as the "correct-a-cap"), It places the "traces" withing the cap at very close proximity to each other. Over time and exposure to ozone, these traces may exhibit "tracking" or carbon arcing. The low voltage side appears to be much more robust.

A few companies like Delteq, have made an ignition system that does away with the high voltage side of the opti and fires the plugs directly from the multiple coils without using a distributor. However, it still has to use the 2 low voltage reference signals from the original opti that is left inplace. I was sceptical of leaving the opti inplace and still having to rely on the low voltage portion. But after having understood the weaknesses of the opti AND having been told by many that their conversion has been used for several years without incident. I have been convinced that it is a much superior method.
Old Oct 9, 2005 | 08:47 AM
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Re: OPTI question

Originally Posted by speedygonzales
The major failure with the opti is in the high voltage distributor side as apposed to the low voltage side behind it. In order to keep the plug wires on the correct side of the distributor cap(refered to as the "correct-a-cap"), It places the "traces" withing the cap at very close proximity to each other. Over time and exposure to ozone, these traces may exhibit "tracking" or carbon arcing. The low voltage side appears to be much more robust.

A few companies like Delteq, have made an ignition system that does away with the high voltage side of the opti and fires the plugs directly from the multiple coils without using a distributor. However, it still has to use the 2 low voltage reference signals from the original opti that is left inplace. I was sceptical of leaving the opti inplace and still having to rely on the low voltage portion. But after having understood the weaknesses of the opti AND having been told by many that their conversion has been used for several years without incident. I have been convinced that it is a much superior method.
Where I get confused is how the delteq compares to the Dynaspark or the LTCC. Ive searched and seen so many different opions on why one is better than the other but from what I see no matter which one you choose you still have to retain the low side. What's your opinion on each?
Old Oct 9, 2005 | 09:04 AM
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Re: OPTI question

dynaspark is a much improved Opti,
The LTCC and deltec pretty much do the same thing, they use the primary side of the opti(low and high res) and a convertor box to trigger a DIS(Distributorless Ignition System) sytem,
LTCC uses LSx type CNP(Coil Near Plug) coils(8 of em)
Deltec uses a Cadillac Northstar type ignition Module and GM Type 2 waste spark coil packs(4 of em)
Old Oct 11, 2005 | 12:18 AM
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Re: OPTI question

what about the use of coil packs? i know it looks stupid, but i have seen and even heard of someone using the coils off of a 3.8 gm motor, and mounting them over the driverside valve cover. I know MSD makes upgrades for the coils, could this be a better/easier way? or am i just wasting my time? thanks!
Old Oct 11, 2005 | 05:15 AM
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Re: OPTI question

Originally Posted by baddboy1705
what about the use of coil packs? i know it looks stupid, but i have seen and even heard of someone using the coils off of a 3.8 gm motor, and mounting them over the driverside valve cover. I know MSD makes upgrades for the coils, could this be a better/easier way? or am i just wasting my time? thanks!
Deltec uses a Cadillac Northstar type ignition Module and GM Type 2 waste spark coil packs(4 of em)
Old Oct 11, 2005 | 11:07 AM
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Re: OPTI question

Originally Posted by baddboy1705
what about the use of coil packs? i know it looks stupid, but i have seen and even heard of someone using the coils off of a 3.8 gm motor, and mounting them over the driverside valve cover. I know MSD makes upgrades for the coils, could this be a better/easier way? or am i just wasting my time? thanks!
To answer your question, is it better? No it's not a waste of time. Look to where the new engines have gone. They did that for several reasons. I agree it doesn't look as nice.
Old Oct 14, 2005 | 02:09 AM
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Re: OPTI question

Originally Posted by Dave89IROC
Deltec uses a Cadillac Northstar type ignition Module and GM Type 2 waste spark coil packs(4 of em)

Will it work on LT1's?
Old Oct 14, 2005 | 03:07 AM
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Re: OPTI question

Originally Posted by baddboy1705
Will it work on LT1's?
Delteq is made for the LT1, and is used as mentioned with the Northstar coils:
http://www.elitesparkplugs.com/Projectcars.html
Another option is the LTCC, and this uses LS1 style coils:
http://bailey-eng.com/LTCC.html
Old Oct 14, 2005 | 06:03 PM
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Re: OPTI question

thanks for the link im gonna check em out



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