High-Tech Horsepower: Speartech Fires Up 650 Horsepower On A Crate

Even though LSx swaps have become much easier over the years, we still hear folks saying they are too complex for their builds. We recently came across this video that shatters the myth that LSx engines are too complicated to get running with all the necessary systems and sensors.

To precisely make that point – and to help highlight their engine swap harnesses – Speartech uploaded a video of a Gen-V LT4 engine and trans operating on none other than a shipping crate! That’s right, one of GM’s most sophisticated engines to date has been found rockin’ and rollin’ freely on some wood planks.

Beefy V8 engines have been fired on everything from old tires to engine hoists, so seeing a crankshaft spin on a shipping crate isn’t especially newsworthy. But, when you think about all the modern systems that come into play to bring this engine to life, the video becomes a little more interesting. This is a lot more complex than simply running wires to a battery and dropping a fuel hose in a gallon of gas, as the LT4 uses GM’s Direct-Injection fueling system with both a high, and low-pressure pump. The video also shows how the Speartech harness integrates with the Dakota Digital dash and various readouts as well.

Also, the engine in the video is running the latest 10-speed automatic 10L90 transmission, further allowing that with the right tools, you can run a new, supercharged, Direct-Injected, variable-valve-timed, 650-horsepower engine and its e-controlled transmission in about anything – even its own shipping crate! Check out the video and see how simple getting all of GM’s modern horsepower can be with a new Speartech engine swap harness.

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About the author

Andy Bolig

Andy has been intrigued by mechanical things all of his life and enjoys tinkering with cars of all makes and ages. Finding value in style points, he can appreciate cars of all power and performance levels. Andy is an avid railfan and gets his “high” by flying radio-controlled model airplanes when time permits. He keeps his feet firmly grounded by working on his two street rods and his supercharged C4 Corvette. Whether planes, trains, motorcycles, or automobiles, Andy has immersed himself in a world driven by internal combustion.
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