• May 10, 2013
So there you are on May 1 minding your own business on the internet when a forum user called "V12Baker" uploads a picture of the engine block above. But you're on the LS1 forum, a site devoted to the legendary V8s made by General Motors, and that's a V12. V12Baker explains that he sliced two LS1 engines and used the pieces to not only make an LS12, but also a V4 with the leftovers. That is probably when, like user "3.8redbird," you write "April Fools day is April 1st not May 1st."

But the engine is real, built by a guy named Ray and his partners in a shop in Seattle, WA. Ray said they wanted to make a V12 engine for a plane, and after experimenting with Buick 215 engine blocks they got around to the LS. With a stock stroke and a 4.4-inch sleeve, the result is a 545 cubic inch motor (8.9 liters) that fires like a V16 short of four cylinders. Their first two LS12 builds went into a 3/4-scale P51 Mustang, and a Chevrolet Tahoe two years ago. The Tahoe engine, only the second build, was said to get around 525 horsepower.

They now have the parts to make five more LS12s and are refining their technique, working on simpler solutions for the crankshafts - they machined the first crankshafts from a solid piece of steel, but that's crazy expensive. One of the engines is already slated to receive a massive Littlefield supercharger and "might find its way into a long-nosed 240Z." That Z, mind you, will also be getting its own chassis since the decades-old original item couldn't begin to handle the power.

Check out EngineLabs.com for more on the build, and a brief walkaround of the engine in the video below. For the long story, the link to LS1 forums is where the story begins - and where you'll discover that the V4 is apparently the perfect size for a Harley-Davidson.



I'm reporting this comment as:

Reported comments and users are reviewed by Autoblog staff 24 hours a day, seven days a week to determine whether they violate Community Guideline. Accounts are penalized for Community Guidelines violations and serious or repeated violations can lead to account termination.


    • 1 Second Ago
  • 64 Comments
      SublimeKnight
      • 1 Year Ago
      I have a hacksaw and a tube of JB weld, could I duplicate this or is more involved?
        Mr E
        • 1 Year Ago
        @SublimeKnight
        nah, you'll be fine :)
        Cory Stansbury
        • 1 Year Ago
        @SublimeKnight
        I'd invest in a Sharpie marker and string to mark the edge before you cut. Otherwise, I'd say good to go.
        OptimusPrimeRib
        • 1 Year Ago
        @SublimeKnight
        Make sure you use WD40 to lube everything too. Other than that I say you're an engine specialist. I'd use RTV over JB Weld though.
      Mr E
      • 1 Year Ago
      alright, next we need someone to weld a couple W12s together into a Hex-24
      imag
      • 1 Year Ago
      Oh come on - they have done five of these, and they have no videos of one running? I have to say, the idea is brilliant. I would think it would be worth machining the block from scratch.
        imag
        • 1 Year Ago
        @imag
        Sorry - two of these. The point remains - they need video of them running.
      jnbcressy
      • 1 Year Ago
      In the 1960\'s the Air Force needed a truck to haul Minuteman III Missile Boosters out to the silos. The power plant used was two Oldsmobile F85 V-6 engines bolted together to make a V-12. The motor parts were beefed up and designed to produce lots of tourque. The engine also needs premium fuel. I believe they are still in use today. The missile fleet has been reduced from 1000 launchers to 450 they probably never built anymore than the initial run from the 60\'s.
        72CJ5driver
        • 1 Year Ago
        @jnbcressy
        I think more likely it was the GMC twin-6 that powered the minuteman missile trucks. http://jalopnik.com/315982/ass+kickin-engine-of-the-day-gmc-twin+six-v12 No relation to the Olds family of engines.
          72CJ5driver
          • 1 Year Ago
          @72CJ5driver
          Either way, a 702ci V12 gas engined truck with an ICBM on the roof is pure American awesome.
          flynnhadskeath
          • 1 Year Ago
          @72CJ5driver
          You beat me to it.
      Cory Stansbury
      • 1 Year Ago
      Isn't the Falconer V12 SBC based? This is like a more modern interpretation and I approve.
      Zeus
      • 1 Year Ago
      I would love to hear this and I want one badly. Imagine a twin turbo LS V12...mmmmmmm. Really like this and hope it goes into some insane mid engine super car in the near future. Ahhh an LS engine with 4 more cylinders...whoever turned that idea into reality deserves a national holiday. Beautiful.
      ProDriverNC
      • 9 Days Ago

      Man do i see a 2018 Chevy Monva GT in this? Here comes NASCAR.

      RetrogradE
      • 1 Year Ago
      My friend builds engines. He's squeezing nearly 400whp by modifying stock RAZR vehicles. Those are two cylinder engines. Imagine what he could do with this 12 cylinder engine! My best guess is: NASA estimates a trip to Mars will take 6 months. . . unless my friend built the rocket.
        Brodz
        • 1 Year Ago
        @RetrogradE
        You mean Rotary Engines? Apples and Oranges.
      wonky donky.
      • 1 Year Ago
      Looks like cylinders 5 and 6 might have some cooling issues.
      protovici
      • 1 Year Ago
      Im ready for a dyno run! With Nuclear blast walls just in case.
      0xd4700000-0xd48ffff
      reminds me of the south park episode with the harley riders.
      Jerry Niemeyer
      • 1 Year Ago
      is it just me, or does it look like one of those cylinders is missing a lot of cooling passages? That 3rd cylinder from the left looks like it would run VERY hot.
        • 1 Year Ago
        @Jerry Niemeyer
        [blocked]
        John
        • 1 Year Ago
        @Jerry Niemeyer
        Still machine work to be done to open the water jacket up.
        Stang70Fastback
        • 1 Year Ago
        @Jerry Niemeyer
        I think they would prefer to call it PCD (Passive Cylinder Deactivation.)
        Daddy-O!
        • 1 Year Ago
        @Jerry Niemeyer
        A guarantee that Mr. Goodwrench stays busy??
    • Load More Comments