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The Setup Is Far From Complete

Twin Turbo C8 Corvette kit Extreme Turbo Systems
ETS twin-turbo C8 Corvette on the dyno.

News of a “tuned” twin-turbo C8 Corvette is making waves, but it’s not entirely what you think. Indeed, Extreme Turbo Systems has created a twin-turbo 2020 Corvette Stingray, and has even put it on the dyno to validate its power. To which, is an incredibly powerful 736 hp to the wheels. However, there’s a catch.

As is the case with Hennessey, the twin-turbo package is good for a dyno video, but that’s about the extent of it for now. As it stands, Extreme Turbo Solutions admits that there’s a lot more development that needs to happen before their twin-turbo C8 Corvette is at all fit for sale. ETS owner JR Perrot told MC&T how the company managed to extract 736 horsepower to the wheels with their boosted C8, with just 7.5 psi. A video of the new twin-turbo C8 Corvette in action is provided below.

“The car is tuned via a prototype piggyback computer and auxiliary fuel system,” said Perrot. Keyword here being prototype.

A “piggyback” is a controller that intercepts signals to and from the factory ECU, and is able to modify them to achieve a desired tuning result. It’s a solution with limited capability, but a solution nonetheless when dealing such robust levels of encryption and cybersecurity found in the 2020 Corvette. The base process of a piggyback module is the same as a chip or a flash tune, but the data needs to go through many more steps to reach the same goal.

An off-the-shelf example of a piggyback controller is a Burger JB4 system, which isn’t street legal, and is meant only for track and motorsport use. Ultimately, what this means is that 1) the encrypted ECU remains locked – as we originally reported would be a major hurdle over a year ago, and 2) the Tremec 8-speed dual-clutch transmission is also under lock and key as a result. The latter has presented a problem, even in the dyno video.

2020 Corvette Stingray Engine

“Currently the car over powers the clutches and is why we dyno in 4th gear, as 5th gear is too long and the clutches slip,” mentioned Perrot. That said, the R&D conducted by Extreme Turbo Systems has managed to overcome several obstacles.

“Currently, the kit in development plugs into the Coils, MAS, MAP, and O2 sensors. This system keeps the stock ecu happy while allowing us to run in boost with controlled ignition. The additional fuel comes via auxiliary ethanol injection. Street manners and driveability remain stock, but now the car has much more power,” the ETS owner continued.

To state the obvious, Extreme Turbo Systems currently does not offer a twin-turbo C8 Corvette upgrade for sale. However, should that day come, it will likely be one of the most vetted and complete aftermarket solutions available.

2020 Corvette Stingray
2020 Corvette Stingray

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.

Jessi Combs


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