Custom-built 8.1-Liter Chevrolet C8 Corvette Big Block V8 is Running and Driving

Advancement of Time

There was a time in American muscle car culture when the Big Block V8 was the king of engines. The bigger the displacement, the better the power and performance, but as the years have gone by, automakers have advanced engine technology, so engines no longer require as much displacement or big blocks to deliver massive V8 power.

In fact, we're at the point where small V8s can now make incredible power, but one man's love of the Big Block led him to undertake a massive project. His chosen car is the latest-generation C8 Corvette, and he's giving it the engine he thinks it deserves.

8.1-Liter C8 Corvette

Larry Hoafer is considered an expert and enthusiast of the big-block V8, and since he also has hot-rodding experience, he decided to build an engine that defies modern standards. In a video by YouTuber Greg Quirin, the project, which has been ongoing for 3 and a half years, is reaching a triumphant milestone: readiness for road use. Chevy never built a modern big-block V8; the largest is the 6.2-liter LT2 V8. Larry's engine base is an older Chevy engine, an 8.1L GM Vortec 496 big-block.

The Vortec 496 big block was the final generation made by Chevrolet, used as a workhorse engine for the trucks and SUVs. It was last used in 2009, and since it wasn't the most powerful engine in stock form, Larry chose to take advantage of the cast-iron block to pump out more power, knowing the engine itself had so much more potential without sacrificing reliability.

Some of the major changes to the 8.1-liter include modern touches such as custom-built cylinder heads that incorporate direct injection and variable valve timing. So that the massive engine could fit into the engine bay, Hoafer built a custom dry-sump oiling system, modified front accessory drives, and bespoke headers. The stock 8-speed transmission was carefully mated to the new engine, and the stock electronics, such as the ECU, remain unchanged.

A Man With a Plan

What makes this project incredible is that nobody has ever attempted anything like this, yet Hoafer's expertise and dedication shine through, as the car and engine have completed freeway testing. It's also telling that Hoafer is testing his engine normally, rather than drag racing or doing donuts.

In fact, if you watch the video, the engine is surprisingly quiet and behaves under normal driving conditions and cruising speeds. Hoafer says the build is at about 95%, with him fine-tuning some small issues like light throttle cylinder misfires and sensor errors, but the main fix is to get the factory torque management system to get used to the new engines' more powerful low-end grunt.

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