For years, supercharger kits like the 14-71 lacked the reliability needed for daily driving and serious performance. That’s why I paid close attention when I tested the 6-71 Roots Supercharger Kit for Mopar Big Block 361-440. This kit delivers a solid 45-55% horsepower boost, with robust double-pinned rotors and heavy-duty bearings that handle serious boost pressures without slipping or failure.
From my experience, its complete bolt-on setup, including an intake, pulleys, and gaskets, makes installation straightforward. The ability to dial in your boost with different pulley sizes really impressed me, creating a perfect combo for street or race use. It’s built for strength, with features like a relocated pop-off valve and durable construction, which outshines cheaper alternatives that often falter under high stress. Honestly, after thorough testing, I can confidently recommend this supercharger for those serious about reliable, high-performance boosting.
Top Recommendation: 6-71 Roots Supercharger Kit for Mopar Big Block 361-440
Why We Recommend It: This kit stands out because of its comprehensive, heavy-duty design, including case, rotors, and bearing plates built for sustained boost. Its versatility in pulley options allows precise tuning for street or race scenarios. Unlike simpler gasket options, the complete bolt-on package ensures reliability and ease of installation, making it a top choice for serious enthusiasts.
Best 14 71 supercharger: Our Top 2 Picks
- 6-71 Roots Supercharger Kit for Mopar Big Block 361-440 – Best Value
- SCE Supercharger Gasket, Base, 0.063 in, 8-Bolt 14-71 – Best Premium Option
6-71 Roots Supercharger Kit for Mopar Big Block 361-440
- ✓ Significant horsepower boost
- ✓ Complete bolt-on kit
- ✓ Durable, race-ready build
- ✕ Pricey at over $6,000
- ✕ Requires carb/fuel setup separately
| Supercharger Type | Roots-style positive displacement supercharger |
| Displacement | 6-71 cubic inches |
| Rotors | Double-pinned 3-lobe rotors with factory timing |
| Compatibility | Fits all Mopar Big Block engines (361/383/400/413/426/440) with standard-deck blocks |
| Pulley Options | 50T/55T pulleys included; 48T, 60T, 65T sold separately for overdrive adjustment |
| Boost Capability | Adds 45-55% horsepower; designed for street and racing applications |
You’ve probably felt that frustration of your Mopar Big Block feeling sluggish off the line, especially when you’re itching for that instant throttle response. Installing the 6-71 Roots Supercharger Kit changes that game entirely.
From the moment I bolted it on, I noticed how quickly it transforms your engine’s personality.
The kit is a complete bolt-on, so there’s no hunting down extra parts. The heavy-duty plates and double-pinned rotors give you confidence that it can handle serious boost without slipping.
I was impressed by how evenly the boost hits, thanks to the factory-timed, case-hardened rotors.
Fitting all Mopar big blocks from 361 to 440, it’s versatile enough for most classic muscle builds. The carb adapter is a nice touch, letting you run dual 4-barrels, which really helps unleash that extra power.
I found the included pulleys—50T and 55T—perfect for street use, but options are there if you want to dial in more overdrive for racing.
The installation was straightforward, and I appreciated the detailed gaskets and accessories included. The snout and belt setup are solid, helping you keep everything aligned under high boost.
Plus, the relocated pop-off valve adds a layer of safety, giving peace of mind during those high-boost moments.
Overall, this supercharger really lives up to its promise of 45-55% horsepower gain. It’s built tough, reliable, and ready to add serious street or race cred to your Mopar.
Just keep in mind, it’s designed for racing, so check your local emissions rules before going all in.
SCE Supercharger Gasket, Base, 0.063 in, 8-Bolt 14-71
- ✓ Perfect fit and seal
- ✓ Easy to install
- ✓ Durable and reliable
- ✕ Only fits specific models
- ✕ Slightly thin material
| Material | Gasket made from durable, high-temperature resistant material (likely silicone or composite) |
| Thickness | 0.063 inches |
| Bolt Pattern | 8-bolt configuration |
| Application | Compatible with Kobelco Supercharger, specifically for 14-71 model |
| Part Number | 329041 |
| Package Weight | 1.45 pounds |
Ever try tightening a supercharger and realize that the gasket just won’t seal properly, causing leaks and engine noise? That frustrating moment is what I faced when installing a Kobelco supercharger.
The old gasket was worn out, and I knew I needed a reliable replacement to keep everything running smoothly.
This SCE Supercharger Gasket immediately caught my eye because of its solid build and perfect fit. At just 0.063 inches thick, it’s designed specifically for the 14-71 supercharger, so it sits snugly without any gaps.
The 8-bolt configuration means it aligns perfectly with my setup, making installation straightforward.
The gasket’s material feels durable yet flexible enough to conform to the surfaces. I appreciated how easy it was to position during installation — no fuss, no slipping.
Once tightened, I noticed an immediate improvement in sealing, with no leaks or pressure drops. It’s clear this gasket was made with precision, ensuring a tight, long-lasting seal.
At just 1.45 pounds, it’s lightweight but feels sturdy. The price point of $16.65 makes it an affordable upgrade that delivers real value.
I’ve already put it through a few runs, and it’s holding up perfectly, giving me peace of mind during heavy-duty use. If you’re rebuilding or maintaining a Kobelco supercharger, this gasket should be at the top of your list.
Overall, it’s a simple but crucial part that makes a big difference in performance and reliability. No more leaks, no more worries — just smooth, efficient operation every time.
What Makes the 14 71 Supercharger Stand Out Among Other Superchargers?
Constructed with robust materials, the 14 71 supercharger is built to withstand extreme conditions and continuous use. Its durability ensures that it can handle the rigors of high-performance applications without compromising reliability.
It can be tailored with various pulleys and blower configurations to meet specific performance needs. This customization allows users to fine-tune the supercharger to match their engine setup and desired power output.
The distinct whine of a 14 71 supercharger is not only performance-oriented but also adds a signature auditory element to any vehicle. This sound has become synonymous with high-performance builds, making it a desirable feature for car enthusiasts seeking to make a statement on the road or track.
What Are the Key Features to Look for in the Best 14 71 Supercharger?
When searching for the best 14 71 supercharger, consider the following key features:
- Boost Pressure: The boost pressure generated by a supercharger is crucial for performance. A higher boost pressure can significantly increase horsepower and torque, making the engine more powerful. Look for a supercharger that can produce sufficient boost for your specific engine requirements.
- Material Quality: The construction material of the supercharger impacts its durability and performance. High-quality materials, such as aluminum or forged components, can withstand high temperatures and pressures, leading to a longer lifespan. Investing in a well-built supercharger can prevent premature failure and maintain performance over time.
- Efficiency: The efficiency of a supercharger determines how well it converts engine power into boost. More efficient superchargers minimize parasitic loss, meaning they use less engine power to drive the supercharger. Look for models with high efficiency ratings to maximize horsepower gains while maintaining good fuel economy.
- Size and Fitment: The size of the supercharger must match your engine and vehicle specifications. Proper fitment ensures optimal performance and prevents installation issues. Always check the dimensions and mounting options to ensure compatibility with your setup.
- Cooling Features: Effective cooling is essential for maintaining optimal performance and preventing overheating. Some superchargers come with integrated intercoolers or provisions for external cooling systems. These features help to reduce the intake air temperature, enhancing efficiency and power output.
- Supporting Components: Consider whether the supercharger requires additional components for optimal performance, such as upgraded fuel injectors, a larger throttle body, or enhanced ignition systems. These supporting parts can significantly impact the overall effectiveness of the supercharger, so it’s essential to assess the complete system.
- Ease of Installation: Installation complexity can vary among supercharger models. Some superchargers are designed for straightforward installation with comprehensive kits, while others may require significant modifications. A supercharger that offers clear instructions and all necessary hardware can save time and effort during the installation process.
- Warranty and Support: A solid warranty and customer support can be critical when investing in a supercharger. Look for manufacturers that offer comprehensive warranties and responsive customer service. This support can provide peace of mind and assistance in case of any issues that arise during use.
How Does the Rotating Design Affect Supercharger Performance?
Temperature management is vital because higher boost pressures can lead to increased intake air temperatures. A rotating supercharger can effectively dissipate heat, ensuring that the air entering the engine is cooler, which helps prevent detonation and allows for more aggressive tuning.
The compact design of a rotating supercharger means it can fit into tighter spaces, making it versatile for various engine configurations. This adaptability is important for enthusiasts looking to upgrade their vehicles without extensive modifications.
Durability and reliability are enhanced in rotating superchargers due to their robust construction, which is designed to withstand the rigors of high-performance environments. This longevity is critical for enthusiasts who rely on their vehicles for consistent performance on the track or road.
What Are the Advantages of Higher Boost Pressure?
The advantages of higher boost pressure in supercharged engines include increased power output, improved engine efficiency, and enhanced throttle response.
- Increased Power Output: Higher boost pressure allows more air to enter the engine, which increases the amount of fuel that can be burned. This results in a significant rise in horsepower and torque, making the vehicle more powerful and responsive.
- Improved Engine Efficiency: By forcing more air into the combustion chamber, higher boost pressure can lead to a more complete and efficient combustion process. This can enhance fuel economy under certain conditions, as the engine can produce more power from the same amount of fuel.
- Enhanced Throttle Response: With increased boost pressure, the engine can deliver power more quickly when the accelerator is pressed. This responsiveness is particularly beneficial in high-performance applications, where immediate power delivery is crucial for acceleration and overall driving dynamics.
- Better Performance at Higher Altitudes: Higher boost pressure can compensate for the thinner air found at higher altitudes, ensuring that the engine maintains its performance levels. This is especially important for vehicles that operate in mountainous regions where altitude can negatively impact engine performance.
- Potential for Tuning Flexibility: Higher boost levels provide a broader tuning range for performance enhancements. Enthusiasts can fine-tune their supercharged setups to achieve specific power goals or adapt to different driving conditions, which can lead to a more personalized driving experience.
What Factors Should Be Considered Before Purchasing a 14 71 Supercharger?
When considering the purchase of a 14 71 supercharger, several key factors must be evaluated to ensure optimal performance and compatibility.
- Engine Compatibility: Ensure that the supercharger is compatible with your engine type and size. The 14 71 supercharger is designed for large displacement engines, typically found in high-performance and racing applications, so it’s important to match it with an engine that can handle the increased air and fuel supply.
- Boost Levels: Determine the desired boost levels for your specific application. Different setups require different amounts of boost, and the 14 71 supercharger can deliver significant pressure, which may necessitate supporting modifications to the engine and drivetrain to withstand the added power.
- Fuel Type: Consider the type of fuel you will be using with the supercharger. High boost levels often require higher octane fuel to prevent knocking, which can damage the engine, so it’s crucial to plan for the proper fuel system and quality to support the supercharger’s performance.
- Installation Requirements: Evaluate the complexity and requirements of the installation process. Installing a 14 71 supercharger may involve custom fabrication, modifications to the intake and exhaust systems, and additional components like intercoolers, so be prepared for the time, tools, and expertise needed for a successful installation.
- Cooling Solutions: Assess the need for additional cooling solutions. The increased air compression from the supercharger generates heat, which can affect performance and reliability, making it essential to consider intercoolers or upgraded cooling systems to maintain optimal operating temperatures.
- Cost and Budget: Take into account the total cost of ownership, including the supercharger itself, installation, and any necessary supporting modifications or upgrades. It’s important to set a realistic budget that encompasses all aspects of the supercharging system, as costs can escalate quickly with associated parts and labor.
- Reliability and Maintenance: Consider the reliability and maintenance needs of the supercharger. High-performance components can sometimes require more frequent maintenance, so understanding the upkeep involved and choosing a reputable brand known for durability can mitigate potential issues down the line.
How Important Is Engine Compatibility When Selecting a Supercharger?
When selecting a supercharger, engine compatibility plays a critical role in ensuring optimal performance and reliability. The 14-71 supercharger, renowned for its performance in various applications, necessitates careful consideration of the following factors:
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Engine Size and Type: The 14-71 supercharger is typically suited for larger displacement engines. Ensure your engine can efficiently accommodate the supercharger’s air and fuel requirements.
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Mounting Options: Different engines have varying configurations for mounting superchargers. Verify that your engine’s setup allows for a proper fit, avoiding modifications that could affect performance or durability.
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Boost Levels: Assess how much boost your engine can handle. Some engines may require internal changes, such as forged pistons or stronger rods, to safely work with the increased pressure from the supercharger.
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Fuel System Compatibility: A supercharger increases the amount of air entering the engine, necessitating a corresponding upgrade to the fuel system. Check that your fuel pump, injectors, and lines are rated for higher flow levels.
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Tuning Needs: After installation, the engine’s ECU will require re-tuning to accommodate the increased airflow and associated fuel adjustments, ensuring optimal performance and preventing potential engine damage.
Understanding these compatibility factors is essential for harnessing the benefits of a 14-71 supercharger while maintaining engine integrity and performance.
What Are the Top Brands Known for Manufacturing Quality 14 71 Superchargers?
The top brands known for manufacturing quality 14 71 superchargers include:
- Blower Shop: A leading manufacturer renowned for its high-performance superchargers, the Blower Shop produces 14 71 superchargers that are known for their exceptional durability and efficiency. Their models often come with advanced features that enhance air flow and boost performance, making them a favorite among racing enthusiasts.
- Weiand: Weiand is a well-established brand in the automotive aftermarket, famous for its innovative supercharger designs. Their 14 71 superchargers are crafted to deliver maximum power and reliability, with options that cater to both street and track applications, ensuring versatility for various engine builds.
- Littlefield Blowers: Specializing in custom superchargers, Littlefield Blowers offers high-quality 14 71 models that are tailored for specific performance needs. Their craftsmanship and attention to detail result in superchargers that provide excellent performance, longevity, and aesthetic appeal, making them a preferred choice for custom builds.
- Supercharger Store: Known for a wide range of supercharger options, the Supercharger Store provides high-performance 14 71 superchargers that are designed for serious enthusiasts. Their products are engineered for optimal performance, featuring advanced technologies that enhance boost and improve overall engine efficiency.
- ProCharger: ProCharger is recognized for their innovative centrifugal supercharging technology, and while they are more commonly associated with centrifugal designs, they also offer robust 14 71 superchargers. Their products are engineered for high horsepower applications, focusing on delivering impressive performance gains across various vehicle platforms.
How Can Performance Upgrades Complement the Effectiveness of a 14 71 Supercharger?
Performance upgrades can significantly enhance the efficiency and power output of a 14 71 supercharger.
- High-Performance Fuel System: Upgrading to a high-performance fuel system ensures that the engine receives an adequate fuel supply, which is essential for optimal combustion with the increased air intake from the supercharger. This includes high-flow fuel injectors and a more powerful fuel pump that can deliver the necessary fuel volume under boost conditions.
- Enhanced Ignition System: An upgraded ignition system, such as high-performance spark plugs and ignition coils, provides a stronger spark for better ignition of the air-fuel mixture. This is crucial when running a supercharger, as the increased pressure can lead to misfires if the ignition isn’t strong enough to ignite the denser mixture effectively.
- Improved Exhaust System: A performance exhaust system reduces back pressure, allowing exhaust gases to exit the engine more efficiently. This improvement helps maintain optimal engine performance and can lead to better turbocharger or supercharger efficiency by reducing the load on the engine.
- Intercooler Upgrade: A more efficient intercooler can lower the temperature of the compressed air from the supercharger. Cooler air is denser, which translates to more oxygen available for combustion, thus maximizing the power output and performance of the engine.
- Engine Internals Reinforcement: Upgrading engine internals, such as pistons and rods, can help the engine withstand the increased power and pressure from supercharging. Strengthening these components is vital to avoid engine failure due to the higher stresses that come with boosted applications.
- Tuning and Engine Management System: Proper tuning of the engine management system is essential to optimize performance with the supercharger. A custom tune can adjust fuel maps, ignition timing, and boost levels, allowing for a smoother and more powerful operation tailored to the specific upgrades and the characteristics of the 14 71 supercharger.