Understanding the ProCharger Supercharger

The ProCharger supercharger is a centrifugal forced induction system widely favored for boosting the performance of LS-based engines, including the 5.7L or 6.0L V8 found in the Chevy Impala SS. Unlike a roots-type blower that delivers instant low-end boost, a ProCharger uses an impeller spun by a belt-driven step-up gearbox to compress air and force it into the engine. This design provides smooth, linear power delivery that builds with engine RPM, making it an excellent choice for street-driven Impalas that need both daily drivability and serious passing power.

ProCharger kits for the Impala SS are typically self-contained, meaning the supercharger has its own oil supply and does not tap into the engine’s oil system. This simplifies installation and maintenance. A key component is the intercooler, which cools the compressed air before it enters the intake manifold, reducing intake air temperature and allowing more aggressive tuning with lower risk of detonation.

Preparation and Required Tools

Before you begin, gather all necessary components and tools. A typical ProCharger kit for the Chevy Impala SS includes the supercharger head unit, mounting bracket, intercooler, tubing, belt, injectors, fuel pump booster (or upgraded pump), and hardware. Ensure you also have supporting modifications ready if you plan to run higher boost levels.

Essential Tools and Supplies

  • Mechanic’s tool set (sockets, wrenches, screwdrivers, pliers)
  • Torque wrench (ft-lb and in-lb ranges)
  • Jack and jack stands or lift
  • Coolant drain pan and fresh coolant (Dex-Cool or equivalent)
  • Engine oil and filter (5W-30 or as recommended for your engine)
  • Thread locker (medium strength)
  • Dielectric grease for electrical connections
  • Safety glasses and gloves

Checklist of Kit Components to Verify

  • ProCharger head unit (e.g., P-1SC-1, D-1SC, or newer F-1 series)
  • Mounting bracket and hardware
  • Intercooler core and charge pipes
  • Drive belt and tensioner (if not using factory tensioner)
  • Fuel injectors (typically 50–80 lb/hr depending on target horsepower)
  • Fuel pump or voltage booster (e.g., BAP – Boost-A-Pump)
  • Air filter and intake tubing
  • Installation manual and wiring harness (for boost-a-pump and optional gauge)

If this is your first forced induction installation, it’s wise to have a tuning solution ready—such as an HP Tuners or EFI Live setup—because the engine will require a custom calibration to run safely with boost.

Installation Process: Step by Step

While each ProCharger kit comes with its own manual, the general workflow for a Chevy Impala SS installation follows these stages. Expect to spend a full weekend if you’re experienced, or longer if you’re learning as you go.

Stage 1: Removing Factory Components

  • Disconnect the negative battery cable.
  • Drain the coolant and remove the radiator hoses (the intercooler often mounts in front of the radiator).
  • Remove the factory air intake assembly, including the airbox and MAF sensor.
  • Unbolt the alternator and power steering pump brackets as needed to access the supercharger mounting area.
  • Remove the serpentine belt and any accessories that block bracket installation.

Stage 2: Installing the Supercharger Bracket and Head Unit

The ProCharger bracket replaces the factory alternator bracket (or mounts to specific existing holes). Follow the torque specs provided in your kit—typically using thread locker on bracket bolts. Mount the supercharger head unit to the bracket, then install the drive belt that runs from the crankshaft pulley to the supercharger’s pulley. Tension the belt according to instructions, often using a dedicated tensioner included with the kit.

Stage 3: Intercooler and Piping

Place the intercooler in front of the radiator and condenser. The kit will include brackets that attach to the core support or frame. Run the charge pipes from the supercharger outlet to the intercooler, and from the intercooler to the throttle body. Use silicone couplers and T-bolt clamps to ensure no boost leaks. It’s common to need minor trimming of plastic shrouds or the bumper support for clearance on the Impala SS.

Stage 4: Fuel System Upgrades

Boost increases fuel demand significantly. Replace the fuel injectors with the ones supplied in the kit. If your kit includes a fuel pump voltage booster (BAP), wire it into the fuel pump harness—usually near the fuel tank under the rear seat of the Impala. Alternatively, some builders install a higher-flow in-tank pump (e.g., Walbro 450). Ensure the fuel pressure regulator can maintain the proper pressure (usually 58 psi for LS engines).

Stage 5: Electrical and Sensor Connections

  • Connect the supercharger’s oil supply/return lines if it is a self-contained unit—this is typically just tubing that runs from the head unit to its own reservoir.
  • Install any included boost reference line to the fuel pressure regulator.
  • Wire the boost-a-pump following the diagram; use dielectric grease on connectors.
  • If you plan to monitor boost, install a boost gauge and connect the vacuum/boost line to a tapped intake manifold port.
  • Reinstall the MAF sensor in the intake tube (if retaining a MAF-based tune) or consider a speed-density tune if instructed by your tuner.

Stage 6: Reassembly and First Start

Reinstall the radiator, hoses, and any removed accessories. Fill the cooling system with fresh coolant. Double-check all bolts for correct torque, ensure no tools are left in the engine bay, and reconnect the battery. Before starting, prime the fuel system by turning the key to “ON” a few times (without cranking). Start the engine and immediately check for oil leaks, coolant leaks, and fuel leaks. Let the engine idle and listen for any abnormal noises from the supercharger (a slight whine is normal; a grinding sound is not). Check belt alignment and tension after a few minutes of idling.

Do not drive the car until it has been properly tuned. Running a supercharger without a custom tune can cause severe engine damage due to excessive knock or lean conditions.

What to Expect During Installation

Installing a ProCharger on an Impala SS is not a simple bolt-on affair for most owners. Here are realistic expectations:

  • Time commitment: Plan for 12–20 hours of labor if you are mechanically inclined and have all tools handy. First-timers may need a full weekend or multiple evenings.
  • Modifications required: You may need to trim plastic shrouds, move the washer fluid bottle, or relocate the horns. The intercooler often requires minor bumper support trimming.
  • Assistance: Having a friend help with heavy components (the supercharger head unit weighs about 15–20 lbs) and belt installation is strongly recommended.
  • Tuning is mandatory: Even if the kit comes with a “safe” base tune, it is not plug-and-play. You must get a dyno tune or remote tune from a reputable LS tuner. Expect to pay $400–$800 for tuning.
  • Potential challenges: Pulley alignment issues, belt slippage at high RPM, and fuel system limitations on higher boost levels are common. Upgrading to a smaller pulley later will require further tuning and possibly a larger fuel pump.

Benefits of Supercharging the Chevy Impala SS

The Chevy Impala SS with its LS engine responds extremely well to forced induction. Here are the key benefits you can expect after installation and proper tuning:

  • Horsepower gains of 100–200+ rwhp depending on boost level and supporting mods (e.g., 8 PSI on a stock engine yields around 450–480 rwhp, while 12 PSI with upgraded injectors and fuel system can exceed 550 rwhp).
  • Improved throttle response at higher RPM due to the centrifugal supercharger’s efficient air compression.
  • Enhanced driving experience both on the highway and around town—the powerband is smooth and predictable, making it easier to control than a turbo system.
  • Retains relative drivability for a daily driver, especially if you keep boost conservative (7–9 PSI) and maintain a conservative tune with good intercooling.
  • Resale value/marketability – A well-documented, professional-style ProCharger installation can make the car more desirable to enthusiasts.

However, be aware that adding a supercharger will place additional stress on the transmission (especially the 4L60-E in earlier Impala SS models) and the cooling system. Upgrading to a larger transmission cooler, a shift kit, or even a built transmission may be necessary if you plan to track the car or run high boost. Similarly, the stock radiator may need to be supplemented with an auxiliary fan or upgraded core to keep coolant temps in check.

Post-Installation Maintenance

Keeping your supercharged Impala SS reliable requires a few extra maintenance steps beyond a stock engine:

  • Oil changes every 3,000–4,000 miles using full synthetic 5W-30 (consider 5W-40 for higher boost). The supercharger has its own oil reservoir that should be checked and changed per ProCharger’s schedule (typically every 12,000 miles or annually).
  • Belt inspection – The high-tension drive belt wears faster than a stock belt. Check for fraying, glazing, and proper tension every oil change. Replace with a Gates or ProCharger-specified belt if worn.
  • Intercooler cleanliness – Debris (leaves, bugs) can block the intercooler core. Gently clean it with low-pressure water and a soft brush. Also check charge pipe connections for boost leaks.
  • Fuel system maintenance – Run fuel system cleaner occasionally, and consider testing fuel pressure periodically. If you use a BAP, inspect wiring connectors for corrosion.
  • Monitor data – If you have a scan tool or wideband gauge, check air/fuel ratios and knock retard values frequently. A sudden change in AFR may indicate a fuel pump failing or injector issue.
  • Cooling system – The intercooler adds heat load. Flush coolant every 2 years and consider upgrading to a higher-flow water pump or thermostat (160–180°F) if you see high coolant temps in summer.
  • ProCharger Official Website – Technical specs, parts, and authorized dealers.
  • Impala SS Forum – Community build threads and advice from owners who have installed ProChargers.
  • HP Tuners – Common tuning software for the Impala SS; find local tuners or self-tuning resources.
  • SS Parts – Supplier of supporting mods for the Chevy Impala SS (transmission upgrades, cooling, fuel system).

Final Thoughts

Installing a ProCharger supercharger on your Chevy Impala SS transforms it into a high-power street machine that can still serve as a comfortable daily driver. The process demands attention to detail, a methodical approach, and a solid tuning strategy to unlock the full potential of the LS engine. With proper installation and maintenance, a ProCharger-equipped Impala SS delivers exhilarating acceleration and a memorable driving experience for years to come. Whether you’re a weekend warrior or a seasoned builder, the end result is well worth the effort.