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Anyone ever remove Gen5 LT1 and install late C4 optispark LT1 ?

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Old 10-17-2017, 04:09 PM   #1
dizwiz24
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Default Anyone ever remove Gen5 LT1 and install late C4 optispark LT1 ?

Not a troll, ive been here almost 20 yrs.

huge fan of the c4, as i have mechanical skills and know-how to solve all the gremlins issues others may have had with the car.

that said, i would love to do a different kind of build - even if i lose some performance (due to higher weight).

take out the gen5 lt1 engine and install c4 based optispark lt1 engine (into the c7). Do heads/cam and bore to 383 to make up any lost HP/TQ.

goal would be to show how good the old motor is - even in a new c7.

maybe get into hot rod magazine ? Dyno pulls and drag runs comparing the two

yay or nay?

Last edited by dizwiz24; 10-17-2017 at 04:10 PM.
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Old 10-17-2017, 04:29 PM   #2
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Why on Earth would you remove an engine superior in every objective way to replace it with an inferior engine to obtain the most clusterfuck disaster of an ignition system in the manufacturer's history?
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Old 10-17-2017, 04:33 PM   #3
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Why on Earth would you remove an engine superior in every objective way to replace it with an inferior engine to obtain the most clusterfuck disaster of an ignition system in the manufacturer's history?
the optispark is only a disaster if you are a retard and install a $69 non oem, or $500 msd optispark (also garbage).

if you have an oem vented optispark (with mitsubishi sensor) , it becomes completely reliable.

if you have a non vented 92-94, you install a vent (and again use an oem optispark with mitsubishi sensor) and it becomes reliable again.

c7 lt1 is superior, i wont argue.
But put a c4 lt1 in there (and sell the c7 lt1 for a net profit), and maybe you could get in a magazine
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Old 10-17-2017, 04:34 PM   #4
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If you are wanting 'old skool vs. new', why not go all-in and go with a 1970-72 LT-1?

The "LT-1" has a warm place in many hot-rodders hearts, while the C4-era LT1, while a fine motor (despite the optispark debacle) is rather unlamented.

"LT-1 vs LT1" makes for a better story headline anyways if you are looking for an article to grab eyeballs.

Last edited by Kent1999; 10-17-2017 at 04:35 PM.
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Old 10-17-2017, 04:40 PM   #5
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Quote:
Originally Posted by dizwiz24 View Post
the optispark is only a disaster if you are a retard and install a $69 non oem, or $500 msd optispark (also garbage).

if you have an oem vented optispark (with mitsubishi sensor) , it becomes completely reliable.

if you have a non vented 92-94, you install a vent (and again use an oem optispark with mitsubishi sensor) and it becomes reliable again.

c7 lt1 is superior, i wont argue.
But put a c4 lt1 in there (and sell the c7 lt1 for a net profit), and maybe you could get in a magazine
I've had three camaros, all vented. They all suck. Some just suck less than others.

The damn water pump weep hole is directly above the high voltage distributor with an optical sensor.
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Old 10-17-2017, 04:42 PM   #6
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Quote:
Originally Posted by Kent1999 View Post
If you are wanting 'old skool vs. new', why not go all-in and go with a 1970-72 LT-1?

The "LT-1" has a warm place in many hot-rodders hearts, while the C4-era LT1, while a fine motor (despite the optispark debacle) is rather unlamented.

"LT-1 vs LT1" makes for a better story headline anyways if you are looking for an article to grab eyeballs.
great suggestion !
everyone talks about doing a resto-mod (putting modern engine into classic car) but what about the other way around ? (You get the lumpy idle, etc)
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Old 10-17-2017, 04:45 PM   #7
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You monster!
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Old 10-17-2017, 04:56 PM   #8
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I guess given enough time, almost any idea, no matter how unlikely, becomes inevitable!

I had a '96 LT4 and I loved that old Vette. I didn't have problems with the improved opti-spark. Regardless, putting even a heavily modded C4 motor in a C7 does NOT strike me as the greatest of ideas, regardless of whether or not a magazine prints an article about it, or how much ahead (financially) you may come out on the swap.

Why would you do that to a C7???

With creative thinking like that, I suggest you stick to it and come up with something that would appeal to more people, as opposed to appealing to a tiny segment of the Corvette community, which at best is what I think this might appeal to (and I stress the word "might" since I doubt this would have much appeal at all.)
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Old 10-17-2017, 04:59 PM   #9
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Quote:
Originally Posted by Kent1999 View Post
If you are wanting 'old skool vs. new', why not go all-in and go with a 1970-72 LT-1?

The "LT-1" has a warm place in many hot-rodders hearts, while the C4-era LT1, while a fine motor (despite the optispark debacle) is rather unlamented.

"LT-1 vs LT1" makes for a better story headline anyways if you are looking for an article to grab eyeballs.
The 1970 lt1 engine was a beast and had RPM to spare. If you are thinking about destroying a C7, why not make it an actual "Hot Rod"? Build the 1970 engine with freshen up stuff and drop it in. By the way, don't sell the new LT1 until you finish your project, you may see that the new LT1 was faster anyhow. JMO
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Old 10-17-2017, 05:01 PM   #10
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Why on earth would you consider replacing an aluminum block with 20 year older technology iron block? You might get a mention in a magazine, but it won't be for the reason you think.

If you have the talent and $ to do such a swap, I think you could think of a much better swap than that! Getting all the computers to work properly, with all the gauges and nanny's would be a herculean task onto itself.


I hope you are using a salvage title C7 or flood car as a starting point. Otherwise, you are going to take a C7 maybe worth $50K and transform it into a C7 worth $5k?


Please reconsider.
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Old 10-17-2017, 05:01 PM   #11
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Quote:
Originally Posted by dizwiz24 View Post
everyone talks about doing a resto-mod (putting modern engine into classic car) but what about the other way around ? (You get the lumpy idle, etc)
I can quickly think of a long list of reasons to do a resto-mod, and not one to do it the other way around.

While putting a C4 engine into a C7 might get you into a magazine, you would never recover the investment because it would be a white elephant of a car that nobody would want.

The magazine carrying that article might not be one you want to be in either.
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Old 10-17-2017, 05:02 PM   #12
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Quote:
Originally Posted by Flame Red View Post
Why on earth would you consider replacing an aluminum block with 20 year older technology iron block? You might get a mention in a magazine, but it won't be for the reason you think.

If you have the talent and $ to do such a swap, I think you could think of a much better swap than that! Getting all the computers to work properly, with all the gauges and nanny's would be a herculean task onto itself.


I hope you are using a salvage title C7 or flood car as a starting point. Otherwise, you are going to take a C7 maybe worth $50K and transform it into a C7 worth $5k?


Please reconsider.
again
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Old 10-17-2017, 05:02 PM   #13
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God, that has to be one of the dumbest ideas ever. There may be worse swaps I can think of but that one is one is near the top.
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Old 10-17-2017, 05:09 PM   #14
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Here's a magazine that would love to print an article about such a swap:


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Old 10-17-2017, 05:12 PM   #15
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Why stop there?? Install a steam engine in a C7. Or pull it with horses. I'm sure either will get you publicity since that's what you're after
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Old 10-17-2017, 05:14 PM   #16
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I mean yeah do it but then put it back
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Old 10-17-2017, 05:14 PM   #17
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It would be extremely difficult to maintain communications with the various chassis systems, PTM, e-diff etc. Same issue with even putting an LS in the 7. The system won't/don't talk to each other absent a whole lot of work, perhaps not even at all.

Would be even worse/harder with a C4 LT1 - it'd be a major obstacle to integrate the engine into all the other subsystems.

Unless you can both turn a wrench and design/program engine and chassis control computers, then good luck. And good luck even if you can.
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Old 10-17-2017, 05:14 PM   #18
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Quote:
Originally Posted by loganexplosion View Post
why stop there?? Install a steam engine in a c7. Or pull it with horses. I'm sure either will get you publicity since that's what you're after
brilliant
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Old 10-17-2017, 05:21 PM   #19
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I see computer problems in this swap
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Old 10-17-2017, 05:23 PM   #20
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Quote:
Originally Posted by dizwiz24 View Post
Not a troll...
Wrong. As I suspected, you posted a link to this thread in C4 Gen, with one purpose in mind. I think we all know that purpose.

>>>Link to C4 Gen Thread<<<
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