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V12 LS, anyone know who made this?

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Old 09-21-2011, 08:19 PM
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i dont know if this v-12 is real or not but g.m made a ls v-10 to replace the ageing 454 in the trucks and to give some competition to the dodge and ford v-10. But it got scraped and they built the boat anchor 8.1 496 C.I. There is a very interesting article in gm hightech performance december 2005 issue page 47-53 check
it out
Old 09-21-2011, 08:51 PM
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Originally Posted by Bloombox1
i dont know if this v-12 is real or not but g.m made a ls v-10 to replace the ageing 454 in the trucks and to give some competition to the dodge and ford v-10. But it got scraped and they built the boat anchor 8.1 496 C.I. There is a very interesting article in gm hightech performance december 2005 issue page 47-53 check
it out
You mean this? It has some similarities to an LS, but it doesn't look like what's in the first post.
http://www.gmhightechperformance.com...ory/index.html
Old 09-22-2011, 12:38 AM
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Originally Posted by got-a-ls1
not to mention the fact that anyone who had the skills to weld half another engine onto a ls1 would never, never use a plastic manifold. that would have a sexy sheet metal intake on there. no question. plus you cant make plastic look that smooth if you could stick it together.

plus crescent wrench? come on.. lol
I laughed really hard when I read that.
Old 09-22-2011, 08:54 PM
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Originally Posted by ZexGX
You mean this? It has some similarities to an LS, but it doesn't look like what's in the first post.
http://www.gmhightechperformance.com...ory/index.html
never meant to make anyone think it looks like whats in the first post just the fact that g.m made a ls v-10. The closest extra cylinder ls ive ever hear of.
Old 09-23-2011, 12:27 AM
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looks like he used 98 based heads, look close and see the perimeter bolt head...
Old 09-23-2011, 02:04 AM
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Photoshop, lighting near the rear of the engine is wrong.
Old 09-23-2011, 02:18 AM
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didnt GM mate to ls motors together for a v-16 and put it in a suburban? for some reason i can recall something like that in a one off show truck.
Old 09-23-2011, 08:31 AM
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Originally Posted by kevin99hoss
didnt GM mate to ls motors together for a v-16 and put it in a suburban? for some reason i can recall something like that in a one off show truck.
http://www.performancetrucks.net/for...katech-428815/

Old 09-23-2011, 07:46 PM
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^ The link to Katech's site doesn't work anymore...
Old 09-23-2011, 08:38 PM
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I spoke with the guy who originally posted the two pictures of the engines on the workbench. He said they were indeed real and provided some info and offered to send a few more pictures when I asked.

The V12 is two blocks/heads cut and then welded together, then sleeved.
The V4 seems to be one block, cut, welded, & sleeved.
The builders name is "Ray" and he is located in Washington state, and works out of a "small" shop.
Apparently he is working on about 4 LS style motors, two of which may be complete(??)

Will keep you guys updated if he sends me any more info/pics...
Old 09-23-2011, 09:06 PM
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Originally Posted by kevin99hoss
didnt GM mate to ls motors together for a v-16 and put it in a suburban? for some reason i can recall something like that in a one off show truck.
yes i think it was a tahoe and they extended the nose i recall that
Old 09-23-2011, 09:20 PM
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can anyone find the article on that tahoe or suburban?
Old 09-24-2011, 08:56 AM
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Originally Posted by kevin99hoss
didnt GM mate to ls motors together for a v-16 and put it in a suburban? for some reason i can recall something like that in a one off show truck.
We didn't mate two engines together. We cast a new V16 block and heads doubling existing LS architecture. One engine is in the Cadillac XV16 concept car and the other is in a stretched Yukon. Over 1000hp/1000 ft-lbs NA and you can set of glass of water on the top of the intake.
Old 09-24-2011, 11:28 AM
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Pretty cool is it's real
Old 09-24-2011, 11:18 PM
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i didnt know its the same motors used in the caddy concept car
Old 09-26-2011, 07:10 AM
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Originally Posted by kevin99hoss
i didnt know its the same motors used in the caddy concept car
It's not.
Old 05-17-2013, 08:57 PM
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Man all the photoshop gurus in here obviously didnt really know anything about the software. Turns out the motors are real. Hey what do ya know, some people really can weld.
Old 05-18-2013, 10:43 AM
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There's always naysayers....."it's gotta be Photoshoped!!" along with all their proof.

The LS12 was made by a shop looking for a new aircraft engine. It was linked in a LSXTV broadcast email.

There's a video of it on the company's website, perhaps that was Photoshoped too?

http://www.enginelabs.com/news/the-l...v12-ls-engine/

It'll fit very nicely into a first gen Monte Carlo.
Old 05-18-2013, 10:50 AM
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Years ago, GM Engineering installed a Ferrari V-12 into a Firebird just to see what it would do. They painted it Ferrari Red, of course.
Old 05-18-2013, 10:57 AM
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Yes there is a huge thread on the build and the builder explains how he overcame a lot of the obstacles, like the intake. There are a few running. Pretty damn cool though



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