C8 Corvette & LT4
Supercharger Upgrades

The LT4 — in the C7 Z06, Camaro ZL1, CT5-V Blackwing, and CTS-V — runs a 1.7L Eaton TVS R1740 supercharger from the factory. It's a proven, high-revving positive-displacement design that responds well to modification. It's one of the most tuned platforms in American performance.

Where LT4 builds plateau is the same place they always do: the factory snout geometry, rotor clearances, and outlet porting aren't optimized for maximum output. FAS precision ports LT4 supercharger assemblies with the same approach we apply to every platform — tighter clearances, improved flow geometry, better sustained output.

For C8 owners with aftermarket supercharger installations on the LT6 flat-plane V8: the service model is different — the LT6 is naturally aspirated from the factory and aftermarket kits are platform-specific. Contact FAS directly to discuss kit-specific work.

The LT4's 1.7L Eaton TVS R1740 runs at a factory boost ceiling of around 9–10 psi, depending on calibration. It's a four-lobe twisted-rotor design with excellent thermal efficiency for its class — which is why it's become a popular base for modification rather than replacement.

The performance ceiling on the stock unit comes from two sources: rotor-to-housing clearance (tighter = more efficient, stock is conservative for longevity) and inlet/outlet port geometry (factory casting leaves airflow restriction). FAS addresses both.

Clearance work requires precision — too tight and you risk contact under thermal expansion, too loose and efficiency drops. FAS specs are validated against thermal expansion data for the operating range of a pushed LT4 build.

Outlet porting on the LT4 blower is equally important. The exit geometry affects how well the compressed charge transfers to the intake manifold. FAS ports and blends the outlet path as part of the full porting package.