Introduction: Unlocking the C8 Corvette’s True Potential

The Chevrolet C8 Corvette already delivers an extraordinary mid-engine platform, but for enthusiasts who crave even more power, forced induction is the next logical step. The Roush TVS2300 supercharger is a proven, twin-screw unit that provides immediate throttle response and substantial horsepower gains without sacrificing daily drivability. This expanded guide walks you through every phase of the installation—from preparation and disassembly to final fluid checks and break-in procedures. Whether you are an experienced DIY mechanic or a seasoned shop technician, following these steps will help ensure a safe, reliable, and high-performance result.

Before you begin, read the full Roush installation manual and confirm that your C8 Corvette is equipped with the necessary supporting modifications (e.g., fuel system upgrades, colder spark plugs, and a professional tune). For technical reference, you can review the official Roush Performance website or consult the Corvette Forum C8 Tech section for real-world installation tips.

Tools and Materials Required

Having the right tools on hand prevents mid-job delays. The following list covers everything needed for a smooth installation:

  • Roush TVS2300 supercharger kit (complete with mounting hardware, belt, and intercooler components)
  • Metric and SAE socket set (3/8” and 1/2” drive, with extensions and wobble joints)
  • Torque wrench (capable of at least 150 ft-lb, with both ft-lb and Nm scales)
  • Trim removal tools (for plastic engine covers and panel clips)
  • Vacuum line kit and quick-connect fittings (for PCV and boost reference lines)
  • Coolant and supercharger oil (use only the specific oil recommended by Roush)
  • Safety glasses, mechanic gloves, and shop rags
  • Basic hand tools: wrenches (10mm, 13mm, 15mm), pliers, screwdrivers, Allen keys
  • Digital multimeter (to verify electrical connections and sensors before startup)
  • Floor jack and jack stands (if removing underbody panels)

Preparation: Setting Up the Work Area

A well-organized workspace reduces errors and protects the car’s finish.

  1. Park the C8 on a level surface and engage the parking brake. For extra safety, chock the rear wheels.
  2. Disconnect the negative battery terminal using a 10mm wrench. Isolate the cable to prevent accidental contact.
  3. Remove the rear engine cover. This is held by push-pins and a few 10mm bolts; store them in a labeled bag.
  4. Remove the upper radiator cover and the air intake ducting to access the throttle body area.
  5. Drain the engine coolant at the petcock on the lower radiator hose (or via a siphon) to avoid spills when disconnecting coolant lines.
  6. Clean the engine bay thoroughly using a degreaser and compressed air. Loose debris can contaminate the supercharger oil galleries.

Take photos of the original hose and harness routing. These reference images save time during reassembly.

Removing Stock Components

This step clears space for the supercharger and intercooler system. Work methodically to avoid damaging sensors or brackets.

Intake Manifold Removal

  • Unplug the wiring harness clips on the intake manifold (MAP sensor, injectors, and throttle body).
  • Release the fuel rail pressure line carefully using the Schrader valve tool (if present) to relieve residual pressure.
  • Remove the eight bolts securing the intake manifold. Use a long extension to reach the rear bolts near the firewall.
  • Lift the manifold straight up off the engine. The gaskets may stick; use a plastic trim tool to separate them without scratching the heads.

Throttle Body and Fuel Rails

  • Detach the throttle body from the intake manifold and set it aside. The Roush kit often includes a new throttle body adapter, so you may reuse the original unit.
  • If your kit replaces the fuel rails, disconnect the quick-connect fittings at the fuel line crossover and cap the open lines.
  • Remove the injectors and fuel rails as an assembly, then swap the injectors onto the new rails (if supplied).

Accessory Drive Components

  • Remove the serpentine belt by releasing tension with a 15mm flex-head wrench on the tensioner pulley.
  • Unbolt the alternator and power steering pump (if interfering) to reposition them; you do not need to disconnect their electrical connectors.
  • Remove the OE supercharger bypass valve (if present) or block-off plate.

Installing the Roush TVS2300 Supercharger

The TVS2300 uses a positive-displacement twin-screw design, delivering boost from idle. Precise alignment and torque are critical.

Heat Exchanger and Intercooler Circuit

  • Mount the intercooler brick into the supercharger housing (pre-installed on many kits). Tighten the retaining screws to 10 ft-lb.
  • Install the front-mounted heat exchanger inside the lower grille area using the supplied brackets. Route the pump wiring to the battery or a switched fuse block.
  • Connect the coolant hoses from the heat exchanger to the intercooler brick. Use constant-tension clamps for leak-free operation.
  • Fill the intercooler system with distilled water and a corrosion inhibitor (or the fluid provided by Roush).

Supercharger Placement and Bolting

  • Apply a thin coat of antiseize to the supercharger mounting bolts (M8 and M10).
  • Lower the supercharger onto the engine. Ensure the dowel pins on the cylinder heads align with the supercharger base gasket.
  • Install the eight main bolts hand tight, then torque them in a cross pattern to 18 ft-lb (24 Nm) for M8 bolts and 37 ft-lb (50 Nm) for M10 bolts as per Roush specifications.
  • Re-torque after the engine reaches operating temperature on first start.

Belt and Idler Pulleys

  • Fit the new longer serpentine belt (included in the kit) over the supercharger pulley, crankshaft, alternator, and tensioner.
  • Rotate the engine by hand using a 24mm socket on the crankshaft bolt to verify belt alignment. The belt should run straight on all pulleys.
  • Install the additional idler pulleys if required by your kit version.

Connecting Electrical and Vacuum Systems

Proper connections prevent boost leaks, check engine lights, and drivability issues.

Vacuum Lines

  • Connect the supercharger bypass valve vacuum line to a manifold vacuum source (usually a port on the intake plenum).
  • Route the PCV line from the valve cover to the intake tube post-MAF sensor. Use the supplied check valve to prevent boost from pressurizing the crankcase.
  • Install a boost reference line for the fuel pressure regulator (if your kit includes one).

Sensor Wiring

  • Reconnect the MAP sensor, throttle position sensor, and any IAT sensor relocated to the new intake tract.
  • Plug in the electronic bypass valve connector (if applicable).
  • Zip-tie all wiring away from hot surfaces and moving components.

Intercooler Pump Electrical

  • Wire the intercooler pump to a switched 12V source (e.g., the fuse box underhood). Use a relay if the pump draws more than 15A.
  • Ground the pump directly to the chassis near the front bumper.

Fluids and Final Assembly

Refill all fluids before the first start to avoid catastrophic damage.

Supercharger Oil

  • Remove the fill plug on the supercharger body (usually at the top or front).
  • Fill with the specified oil (Roush part number 423037) until it reaches the bottom of the fill port threads. Typical capacity is about 4.5 oz.
  • Reinstall the fill plug and clean any drips.

Engine Coolant

  • Refill the cooling system with a 50/50 mix of Dexcool-compatible coolant and distilled water.
  • Bleed air by running the engine with the radiator cap off and heater on, then revving to 2,500 rpm until the thermostat opens.
  • Top off the coolant reservoir to the cold fill line.

Reassembly

  • Reinstall the air intake tube and filter assembly (or upgrade to a high-flow intake if recommended).
  • Replace the engine cover and any underbody panels removed.
  • Reconnect the battery and double-check all connectors.

Testing, Tuning, and Break-In

A supercharger installation is not complete until the vehicle is properly tuned.

  1. Initial startup: Crank the engine without fuel (disable injectors) for 5–10 seconds to build oil pressure. Then enable fuel and start. Listen for abnormal ticking or vacuum leaks.
  2. Check for leaks: Spray soapy water around all boost connections, vacuum lines, and the supercharger gasket. Bubbles indicate a leak that needs tightening.
  3. Burn calibration: Drive the car gently for the first 20 miles, avoiding full-throttle operation. This allows the ECU to adapt to the new airflow.
  4. Professional dyno tune: Even if using a supplied tune, a custom calibration on a chassis dyno maximizes power and safety. Expect gains of 150–200+ wheel horsepower on 93 octane.
  5. Monitor data: Watch fuel trims, knock retard, and intake air temperatures (IAT). IATs should stay below 140°F under boost; if higher, improve heat exchanger airflow or add a water-methanol injection kit.

Conclusion: Enjoying the Boosted C8 Experience

The Roush TVS2300 supercharger transforms the C8 Corvette into a mid-engine monster with relentless power delivery. By following this step-by-step guide, you have tackled the most demanding mechanical and electrical tasks. Remember to perform a follow-up torque check after 100 miles, change the supercharger oil at 5,000 miles, and always use high-octane fuel. For ongoing support, join the C8 General Discussion Forum where owners share data logs and track experiences. With proper installation and maintenance, your TVS2300-equipped C8 will deliver thrilling performance for tens of thousands of miles.