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The Insane Small Block V12 Can Spin At 7,000 RPM

LS V12

The General Motors LS swap is a hot rodding practice that, thankfully, remains the tried-and-true practice to fit mountains of power in a tight space. But to raise eyebrows at an event such as, say, the SEMA Show, a simple LS swap won’t do. So to get creative, the madmen at Race Cast Engineering offer a line of LS V12 engines. Yes – a small block with twelve cylinders. The soundtrack, which can be heard in the video below, delivers an equal mix of both the roar of an American muscle car and the howl of an exotic supercar that is truly unique.

The LS V12 comes by way of Australia, where the country occasionally out does even us Americans when it comes to our passion for high octane and high horsepower. The engine has been paraded in a few vehicles during the SEMA Show over the years, and for the 2019 SEMA Show the V12 will find itself in the engine bay of a new vehicle project from high-end kit company Factory Five.

According to the video, the LS V12 demonstrates its ferocity by unleashing 755 horsepower and 600 lb-ft of torque on pump gas. The latter of which appears to be readily available at any point in time, and that’s the wonderful beauty of displacement. Yet despite all of the rotational mass, the LS V12 can spin up to a screaming 7,100 RPM. However, a more potent version is available, with over 1,000 hp by way a more aggressive cam and some hotter tuning. According to the video, this is the base output of this engine platform, with potential to go much, much higher.

The LS V12 is actually based on the iron block version of the engine architecture, rather than the aluminum block that engines such as the LS7 utilized. The iron small block was common in highly abundant pickup trucks, and is said to withstand loads of power. Total displacement comes in at an incredible 9.5 liters, with a 4.125 inch bore and 3.62 inch stroke.

The Race Cast Engineering LS V12 is available to order right now, but the engine itself costs nearly as much as 2020 C8 Corvette, with a fully dressed motor commanding a whopping $55,200 USD, with a 1,000 horsepower upgrade available for $5,000 and a weight-saving alloy block available for another $5,000. However the kit that features the components for an engine builder to do it themselves runs at a more reasonable $29,300 USD. A small price to pay for the ultimate LS swap? We’ll let you be the judge of that.

Written by Manoli Katakis

Muscle Cars & Trucks was founded by Manoli Katakis - an automotive media veteran that has been covering the latest car news since 2009. His journalism has uncovered dozens of major product changes, updates, plans, and cancellations long before automakers were ready to make things official.

Some highlights over the years of his reporting include the uncovering of the Zora trademark before anybody else reported on the coming of a mid-engine Corvette, as well as the dead-accurate reporting of the coming of the Chevrolet Colorado ZR2, two years before it hit the market, and even before the debut of the concept vehicle. This type of reporting has immediately continued here, with reports of the original seventh-generation Camaro plans being shelved, as well as what's in store for the Chevrolet Silverado.

Some of his work can be found on massive automotive media outlets, such as Motor1. He also has been a guest on the 910AM Radio Station with Detroit News auto critic Henry Payne, as well as the enthusiast-oriented Camaro Show podcast.

Over the years, Manoli has interviewed various automotive industry titans, leaders, and people that make things happen otherwise. These include figureheads such as GM CEO Mary Barra, GM President Mark Reuss, automotive aftermarket icon Ken Lingenfelter, Dodge firebrand Tim Kuniskis, along with various chief engineers of vehicles such as the Ford F-150 & Mustang, Chevrolet Camaro & Corvette, and many more.

At MC&T, Manoli is taking his journalism expertise, deeply planted sources, driving abilities, and automotive industry knowledge to new levels, covering more vehicles and brands than ever before. This is the place where you will continue to read groundbreaking stories about American performance vehicles, pickup trucks, and sport utility vehicles. Here is where you’ll also read insights and quotes from various automotive subject matter experts on the latest relevant products, as well as some of the latest official news from their manufacturers.

Fun facts: he also once beat Corvette Racing driver Tommy Milner in an autocross with a Chevrolet Bolt EV. The biggest vehicle he’s ever driven is a John Deere mining truck. Besides a go-kart, the smallest vehicle he’s driven has been a Hyundai i10. He’s also spent time in the cockpit of various American performance vehicle icons, including the fifth-generation Chevrolet Camaro Z/28, Dodge Challenger Demon, and Ford Mustang GT350R. He has reviewed dozens of trucks, SUVs, and performance vehicles over the years.

One of his favorite new vehicles on the market today happens to be the Chevrolet Colorado ZR2 Bison. He is also a card carrying member of the Sports Car Club of America, and regularly participates in Detroit Region autocross events.

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