We are in the middle of a new campaign in the C8 Corvette horsepower war. Even though absolutely no one has found a way to officially tune the encrypted ECU controlling the latest version of the Corvette, we have now seen several high-profile builders bring big power builds forward, all while playing nice with the factory ECU. The latest is the Californian crew from Boost District who brought their supercharged C8 Corvette out to the 2021 SEMA Show. Boost District claims their Corvette is the first supercharged C8 employing a positive displacement blower. A claim that could probably be disputed.
Like the Lingenfelter build, the Boost District C8 uses the same Eaton TVS 2650 (fun fact: Eaton owns Magnuson) rotor set to crown the Corvette’s 6.2L LT2 V8 engine. Those of you with keen eyes will recognize the TVS 2650 rotor set as the same kit that was employed to transform the C7 Z06’s 650 horsepower LT4 into the 755 hp fire breathing LT5 V8 for the C7 ZR1. The Boost District demo car even uses an old stock LT5 supercharger cover, either for lack of a better option or simply for the LOLs.
The installation of the TVS 2650 is also similar to what we saw from Lingenfelter. A custom accessory bracket is installed above the water pump which holds a jackshaft that then spins the rotors by transferring crank motion via a cog drive belt. This means no modification of the factory dry-sump system is required, nor modification of the OEM serpentine belt routing, aside from the extra few inches required to run the jackshaft. In order to retain the engine compartment’s stock look, the heat exchanger was hidden behind the air duct on the driver’s side.
According to details provided by LSXMag, the supercharged Boost District C8 will be offered in three versions, Stage 1, Stage 2, and Stage 3. All three stages will include the same basic rotor set, the differences will be in the electronic controls and boost levels provided.
The Stage 1 kit will make do with just six to seven pounds of boost and should be capable of 650-700 horsepower at the wheels on pump fuel. The Stage 2 and Stage 3 kits were designed with FuelTech USA and make use of a FuelTech FT550 or FT600 piggyback controller which will run an auxiliary set of port injectors alongside the factory direct injectors for increased performance.
With increased fueling capability there’s obviously more headroom for boost. The Stage 2 kit is able to support up to ten pounds of boost. Stage 3 is for the real crazies who’ve already torn down and rebuilt the LT2. The final stage was designed for cars with upgraded pistons, rods, and upgraded clutches. Boost should be in the mid-teens. No horsepower figures were provided for either Stage 2 or Stage 3. Pricing for the Boost District C8 should be provided sometime shortly.
To the best of our knowledge – and we know best – General Motors has zero plans to bolt a supercharger onto any engine of the C8 Corvette in official capacity. Turbos, on the other hand, are a different story.