Types of Ford Focus Supercharger Kits
A Ford Focus Supercharger Kit is a powerful mechanical upgrade that enhances engine performance by increasing the amount of air forced into the combustion chamber, thereby improving horsepower and torque output. This modification is particularly popular among enthusiasts looking to extract more power from their compact yet capable Ford Focus platform. Two primary types of superchargers are commonly used for the Ford Focus: the Screw Supercharger and the Centrifugal Supercharger. Each offers distinct advantages depending on the driver's goals, whether it be raw performance, daily drivability, or fuel efficiency.
1. Screw (Twin-Screw) Supercharger
The screw supercharger, also known as the twin-screw supercharger, is often considered the pinnacle of forced-induction technology for high-performance applications. It utilizes two interlocking rotors shaped like screws that rotate in opposite directions to compress incoming air before delivering it directly to the engine’s intake manifold.
Advantages
- High thermal efficiency due to minimal heat generation
- Immediate boost delivery with minimal lag
- Compact design fits well in tight engine bays
- Consistent power delivery across the RPM range
- Excellent for track-focused or performance-oriented builds
Limitations
- Higher cost compared to other types
- More complex installation process
- May require additional cooling systems
- Increased stress on engine components at higher boost levels
Best for: Performance-oriented Ford Focus models such as ST and RS variants, especially when paired with supporting modifications like intercoolers, upgraded fuel systems, and engine management tuning.
2. Centrifugal Supercharger
The centrifugal supercharger is widely regarded as the best option for drivers seeking a balance between power gains and everyday usability. Unlike positive displacement systems like the screw type, this supercharger uses a rapidly spinning impeller to accelerate air outward, creating pressure that forces air into the engine as RPM increases.
Advantages
- Cost-effective entry-level performance upgrade
- Easy bolt-on installation with minimal engine bay intrusion
- Efficient at higher RPMs
- Better fuel economy during low-load driving
- Less intrusive noise signature compared to twin-screw units
Limitations
- Noticeable turbo-like lag at lower RPMs
- Boost curve is non-linear, peaking at high RPMs
- Less immediate throttle response
- May require underhood modifications for optimal airflow
Best for: Daily-driven Ford Focus hatchbacks and sedans where fuel efficiency and moderate power gains are desired without compromising reliability.
| Type | Power Delivery | Installation Complexity | Fuel Efficiency | Best Application |
|---|---|---|---|---|
| Screw (Twin-Screw) | Linear & Immediate | High | Moderate | Track use, high-performance builds |
| Centrifugal | Non-linear, High-RPM Peak | Low to Medium | Good | Daily driving, street performance |
Expert Tip: When installing any supercharger kit on your Ford Focus, ensure you have proper engine management tuning, an upgraded intercooler system, and a reinforced drivetrain to handle the increased power output safely and effectively.
Specifications and Maintenance of the Ford Focus Supercharger Kit
Understanding Key Supercharger Kit Specifications
When upgrading your Ford Focus with a supercharger kit, it's crucial to understand the specific components and performance metrics that define its capabilities. Each specification plays a vital role in determining how effectively the system enhances engine output and driving experience.
Supercharger Type
Superchargers come in several designs, each offering unique advantages:
- Roots: Known for immediate power delivery at low RPMs but less efficient at higher speeds due to heat generation.
- Twin-screw: More efficient than Roots types, delivering better top-end power while maintaining strong low-end torque.
- Centrifugal: Operates similarly to turbochargers, producing more power as RPM increases, ideal for high-performance applications.
- V-Band: A variation of centrifugal superchargers with compact design and high efficiency across a broad RPM range.
Boost Pressure
Boost pressure is one of the most critical specifications when evaluating a supercharger kit. Measured in PSI or bar, this determines how much additional air is forced into the engine beyond atmospheric pressure.
Higher boost levels increase horsepower significantly but also place greater stress on engine components. Most street-legal kits are designed to provide between 6-12 psi for optimal balance between performance and reliability.
Intercooler Integration
Many high-quality supercharger kits include an intercooler to reduce intake air temperature after compression, which improves both power and engine longevity.
- Air-to-Air: Uses ambient airflow to cool compressed air—simple, reliable, and effective for most street applications.
- Air-to-Liquid: Offers superior cooling performance using a liquid coolant system, often preferred for track-focused builds or vehicles operating under sustained high-load conditions.
Fuel Injectors
To match the increased airflow from the supercharger, upgraded fuel injectors are essential to maintain proper air-fuel ratios. These are specified by their flow rate:
- Measured in lb/hr or cc/min
- Typical upgrades range from 60lb/hr to 100lb/hr depending on power goals
- High-flow injectors ensure adequate fuel delivery without starving the engine under boost
| Component | Key Specification | Performance Impact |
|---|---|---|
| Tuning Software | Custom ECU calibration or piggyback tuning module | Optimizes ignition timing, fuel mapping, and boost control for maximum power and safety |
| Installation Hardware | Belt tensioners, pulleys, brackets, manifold adapters | Ensures secure mounting and proper alignment of all components |
| Power Gains | Estimated HP/TQ increases (crank vs wheel) | Typically adds 30-150 HP depending on setup and supporting modifications |
Essential Maintenance Practices for Longevity and Performance
Proper maintenance ensures your Ford Focus supercharger kit delivers consistent performance and long-term reliability. Neglecting maintenance can lead to reduced power, drivability issues, or even catastrophic failure.
Important: Always follow the manufacturer’s service schedule and guidelines. Deviating from recommended maintenance intervals or component specifications can void warranties and compromise performance. If you notice unusual noises, loss of power, or abnormal boost behavior, consult a qualified technician immediately.
How to Choose a Ford Focus Supercharger Kit
Selecting the right supercharger kit for your Ford Focus is crucial for achieving optimal performance gains while maintaining engine reliability and longevity. This guide will walk you through the essential factors to consider when choosing a supercharger kit, whether you're building a daily driver or a weekend track machine.
Understand Your Ford Focus Generation
The Ford Focus has gone through multiple generations (Mk1 to Mk4), each with different engine options and underhood layouts. It's critical to identify your specific model year and engine type before selecting a supercharger kit.
- Mk1 (1998–2004): Typically features Zetec or Duratec engines
- Mk2 (2004–2007): Introduced redesigned chassis and new trim levels
- Mk3 (2008–2018): Available with EcoBoost turbocharged engines
- Mk4 (2018–present): Features advanced electronics and hybrid options
Pro tip: Some kits are specifically designed for certain body styles like ST, RS, or sedan/hatchback variants
Supercharger Types and Their Benefits
There are three primary types of superchargers available for Ford Focus applications, each offering unique advantages in power delivery, efficiency, and packaging.
- Roots-type: Positive displacement design that provides immediate low-end torque but can be less efficient at high RPM
- Twin-screw: More efficient than Roots with better thermal characteristics, delivering linear power throughout the RPM range
- Centrifugal: Becomes more effective at higher RPMs, often easier to install due to remote mounting capability
Key consideration: Centrifugal systems often require fewer under-hood modifications
Engine Compatibility and Displacement
Your Focus's engine size plays a significant role in determining which supercharger kits will work best and what kind of power gains you can expect.
- 2.0L Duratec engines benefit from robust bottom ends that handle boost well
- 1.5L EcoBoost engines may require supporting modifications for higher boost levels
- 2.3L EcoBoost units in Focus RS models have excellent factory strength
- Older 2.3L Zetec engines respond well to forced induction upgrades
Performance insight: Smaller displacement engines typically see greater percentage gains from supercharging
Quality Components and System Design
A quality supercharger kit should include all necessary components engineered specifically for the Ford Focus platform, ensuring proper fitment and reliable operation.
- Cast aluminum brackets for secure mounting
- High-efficiency intercooler system
- Upgraded pulley system for desired boost levels
- Fuel system upgrades (injectors, fuel pump)
- Complete wiring harness with relays and fuses
Warranty consideration: Reputable manufacturers offer comprehensive warranty coverage
Installation Tip: Consider purchasing a complete supercharger kit rather than piecing together individual components. Factory-designed kits ensure proper component matching and often come with tuning solutions calibrated specifically for the Ford Focus platform, saving time and potential compatibility issues down the road.
| Supercharger Type | Typical Power Gains | Cost Range | Recommended Use |
|---|---|---|---|
| Roots-type | +50-80 hp | $2,500 - $4,000 | Street performance, drag racing |
| Twin-screw | +60-100 hp | $3,500 - $5,500 | Enthusiast driving, canyon runs |
| Centrifugal | +40-70 hp | $2,000 - $3,500 | Daily drivers, mild performance upgrades |
| Stage-upgrade kits | +100-150+ hp | $5,000 - $8,000+ | Race/track focused builds |
Budget Planning Advice: When budgeting for your supercharger installation, remember to account for additional expenses beyond the base kit price. These may include professional installation labor ($500-$1,500), custom tuning ($300-$800), and potential supporting modifications like upgraded intercoolers, exhaust systems, or cooling enhancements. Investing in quality components upfront often saves money in the long run through improved reliability and performance.
DIY Replacement Guide for Ford Focus Supercharger Kit
Replacing the supercharger kit on your Ford Focus can significantly improve engine performance by increasing air intake efficiency and boosting horsepower. This guide provides a comprehensive walkthrough to safely and effectively complete this project at home, assuming you have basic mechanical knowledge and access to common automotive tools.
Safety Warning: Working with engine components involves risks of injury from heavy parts, sharp edges, and electrical systems. Always disconnect the battery before beginning work, use proper lifting techniques, and ensure your vehicle is securely supported on jack stands if needed.
Essential Tools and Equipment
Before starting the replacement process, ensure you have all necessary tools organized and within reach. Having everything prepared in advance will streamline the workflow and reduce the risk of misplacing components.
- Socket set – For removing and installing bolts of various sizes
- Wrench set – To assist with tight spaces where sockets may not fit
- Torque wrench – Ensures critical fasteners are tightened to factory specifications
- Allen keys – Required for hex-style fasteners found on modern supercharger kits
- Screwdrivers (flathead and Phillips) – Useful for removing panels and covers
- Crank pulley tool – Necessary for locking the crankshaft during belt removal
- Intercooler piping tool – Helps in cleanly disconnecting and reconnecting intercooler hoses without damaging them
- Vacuum hose tool – Prevents tearing or breaking vacuum lines when disconnecting
- Electrical connectors – May be required for bypassing or testing sensors during installation
- Wire ties – For organizing harnesses and keeping wiring neat post-installation
| Phase | Required Tools | Estimated Time | Difficulty Level |
|---|---|---|---|
| Preparation | Service manual, camera, socket set | 30 minutes | Easy |
| Disassembly | Wrench set, torque wrench, vacuum tool | 1.5–2 hours | Moderate |
| Installation | Intercooler tool, Allen keys, screwdrivers | 2–3 hours | Advanced |
| Testing & Reassembly | Wire ties, electrical connectors, torque wrench | 1 hour | Moderate |
Pro Tip: Before disassembling any component, take high-resolution photos from multiple angles. These visual references will help during reassembly, especially for complex routing of hoses, wires, and brackets.
Detailed Step-by-Step Replacement Procedure
- Battery Disconnection and Initial Setup
- Begin by disconnecting the negative terminal of the battery to prevent accidental short circuits.
- Ensure the vehicle is parked on level ground and the engine has cooled completely.
- Open the hood and secure it in place using a prop rod or hood support tool.
- Removing Engine Covers and Intake Components
- Remove the top engine cover by unscrewing or unclipping all retaining fasteners.
- Disconnect the intake system, including the airbox and intake tubing connected to the supercharger.
- Label each connection point as you remove them to simplify reinstallation.
- Draining Coolant and Removing Intercooler System
- Place a drain pan beneath the radiator and open the drain valve to release coolant.
- Remove the intercooler piping and heat exchanger assembly carefully to avoid damaging surrounding components.
- Cap off any open coolant ports to prevent contamination or spills during installation.
- Supercharger Assembly Removal
- Disconnect all electrical connections leading to the supercharger unit.
- Loosen and remove the mounting bolts securing the supercharger to the engine block.
- Use appropriate lifting tools or assistance to carefully lower the old supercharger assembly from the engine bay.
- Installing the New Supercharger Kit
- Inspect the new supercharger kit components for completeness and damage.
- Follow the manufacturer’s instructions precisely for mounting the unit and connecting all hardware.
- Pay special attention to gasket placement and bolt torque sequences to avoid leaks or warping.
- Reassembly of Components
- Reinstall all removed components in reverse order of disassembly.
- Double-check that all hoses, wires, and brackets are properly seated and secured.
- Replace any worn or damaged seals with new ones included in the kit or purchased separately.
- Final Checks and Testing
- Reconnect the battery and visually inspect all connections for security.
- Start the engine and allow it to idle while monitoring for unusual noises or warning lights.
- Check for oil, coolant, or air leaks around the newly installed supercharger and associated components.
- Take the vehicle for a test drive under light load conditions to verify smooth operation and boost response.
Post-Installation Advice: After replacing your supercharger kit, consider updating your ECU tune if modifications exceed stock parameters. A professional tune ensures optimal performance, fuel efficiency, and engine longevity.
Frequently Asked Questions About Ford Focus Supercharger Kits
A supercharger kit for the Ford Focus is an aftermarket performance enhancement system designed to significantly boost engine output. This type of forced induction system compresses incoming air, increasing its density before it enters the combustion chamber. The result is more oxygen available for combustion, which allows the engine to burn more fuel efficiently and generate greater power. Most kits include essential components such as:
- Supercharger unit (roots-type, twin-screw, or centrifugal)
- Intercooler or cooling system upgrades
- Pulleys, belts, and mounting brackets
- ECU tuning or reprogramming modules
- High-flow air intake systems
- Upgraded fuel injectors or pump
These kits are typically engineered specifically for different generations of the Ford Focus, ensuring compatibility with factory components while maximizing gains.
Installing a supercharger kit delivers multiple performance and driving experience improvements:
- Increased Horsepower & Torque: Depending on the setup, gains can range from 30% to over 100% more power than stock levels.
- Improved Throttle Response: Superchargers provide immediate boost without lag, resulting in crisp acceleration.
- Better Passing Power: Especially noticeable in highway situations where extra torque helps merge safely and confidently.
- Enhanced Driving Enjoyment: Transform your daily driver into a sportier machine that's more engaging to drive.
- Towing Capability: Increased torque makes towing small trailers or heavy loads easier and safer.
Additionally, many owners report a more aggressive exhaust note and overall sportier character after installation, enhancing both aesthetics and functionality.
Installation complexity varies depending on the type of supercharger and vehicle generation, but generally speaking, supercharger kits are not considered beginner-level modifications. Key challenges include:
- Engine bay space constraints requiring removal of other components
- Custom routing of belts, intercoolers, and piping
- Modifications to the ECU for proper fueling and timing adjustments
- Cooling system upgrades to manage increased thermal load
- Electrical system integration for sensors and controls
We strongly recommend having the kit installed by a certified mechanic or performance specialist with experience in forced-induction systems. DIY installation is possible for experienced enthusiasts with proper tools and mechanical knowledge, but improper installation can lead to serious engine damage or safety issues.
Most reputable supercharger manufacturers offer warranties with their Ford Focus kits, though terms vary between brands and models. Typical warranty coverage includes:
- Material Defects: Covers manufacturing flaws in the supercharger unit and included components.
- Workmanship: Protects against faulty assembly or component failure under normal use conditions.
- Extended Coverage: Some manufacturers offer extended warranties if the kit is installed at an authorized dealer or service center.
It’s important to note that installing a supercharger may void certain aspects of your vehicle’s original manufacturer warranty, particularly related to engine and drivetrain components. Always check with your installer and review warranty documentation before proceeding.
Yes, a supercharger kit does require regular maintenance to ensure long-term reliability and consistent performance. Key maintenance items include:
| Maintenance Task | Frequency | Description |
|---|---|---|
| Air Filter Inspection/Replacement | Every 15,000–30,000 miles | Ensure clean airflow and prevent debris from entering the supercharger or engine. |
| Supercharger Oil Change | Every 30,000 miles or as specified | Lubricates internal bearings; must be done with manufacturer-recommended oil. |
| Belt Tension & Wear Check | Every 6 months or 10,000 miles | Ensure proper belt alignment and tension to avoid slippage or failure. |
| Cooling System Inspection | Annually or every 20,000 miles | Check intercooler efficiency, coolant levels, and radiator function. |
| ECU Calibration Review | As needed | Update tune if modifications are made or performance feels inconsistent. |
Proper maintenance not only preserves the life of your supercharger but also protects your engine investment and ensures you continue to enjoy peak performance.