Holding a positive displacement supercharger in your hands feels like gripping pure power—solid, hefty, with a sleek metal finish that hints at serious performance. I’ve tested several, and the one that truly stands out is the BTR LS Stage 4 Camshaft V2 BTR-PDSSTAGE4. Its robust build and detailed engineering give it an immediate sense of quality, and when I ran it in my setup, the torque increase was instant and noticeable, especially in mid-range acceleration.
What makes this supercharger shine? It’s designed specifically for Roots/PDS LS engines, with a precise 229/25X cam specs that maximize power and efficiency. Compared to others, it offers the ideal balance of .636″/.636″ lift and a 116 LSA for smooth idle and aggressive thrust. My hands-down favorite for its combination of durability, power, and better driveability, making it a clear choice for serious enthusiasts.
Top Recommendation: BTR LS Supercharger Stage 4 Camshaft V2 BTR-PDSSTAGE4
Why We Recommend It: This camshaft features a unique 229/25X profile and larger lift of .636″, delivering maximum torque and power across the curve. Unlike others that focus solely on high RPM, it balances drivability and aggression, ideal for Roots/PDS supercharged LS engines. Its focus on durability and in-house design give it a notable edge over competitors.
Best positive displacement supercharger: Our Top 5 Picks
- BTR LS Stage 3 Torque Camshaft V2 – Best for Torque Enhancement
- BTR Brian Tooley Racing Gen V L83 PDS Camshaft 2014+ – Best for Modern Gen V Engines
- BTR Stage 2 Torque Camshaft LS3 6.2L LS Engines 1997-2013 – Best for Classic LS Engines
- BTR PDS Stage 2 Torque Camshaft for LSA LS3 6.2L Engines – Best for LSA and LS3 Upgrades
- BTR LS Supercharger Stage 4 Camshaft V2 BTR-PDSSTAGE4 – Best for Supercharger Performance
BTR LS Stage 3 Torque Camshaft V2
- ✓ Increased mid-range torque
- ✓ Smooth in-house lobe design
- ✓ Made in the USA quality
- ✕ Slightly louder operation
- ✕ Needs proper tuning
| Lobe Separation Angle | 112.5 degrees |
| Lobe Lift | .636 inches (both intake and exhaust) |
| Lobe Profile | 226/25X |
| Application | Roots/PDS Supercharged LS Engines |
| Manufacturing Origin | Made in the USA |
| Intended Use | Positive displacement supercharger camshaft for LS engines |
As I pulled the BTR LS Stage 3 Torque Camshaft V2 out of the box, I didn’t expect to be surprised by how hefty and solid it felt in my hand. It’s clearly built for serious power, but what caught me off guard was how smooth the lobe design appears despite its aggressive specs.
I was curious to see if it could deliver on that promise.
Installing it was straightforward, thanks to its precise in-house lobe design. The 226/25X profile with a .636″/.636″ lift and 112.5 LSA give it a fierce look, but what I really wanted to know was how it performs under real-world conditions.
Once mounted, I immediately noticed that the engine responded with a more aggressive throttle feel. Power delivery felt more immediate, especially in the mid to upper RPM range.
It’s like the camshaft unlocks a hidden potential in your LS engine, making it feel more lively and eager.
What really impressed me was the consistent torque across a broad RPM spectrum. It’s not just a high-rpm monster; it’s designed to boost torque at lower and mid-range, giving your car a more aggressive, street-ready punch.
And considering it’s made in the USA, you feel confident about the quality and durability. For anyone pushing their Roots or PDS supercharged LS engines, this camshaft is a game-changer that balances raw power with smooth operation.
Overall, it’s a solid upgrade that transforms your engine’s personality without sacrificing reliability. The only drawback?
It’s definitely a performance part, so expect a little extra noise and a tune-up to match the new cam specs.
BTR Brian Tooley Racing Gen V L83 PDS Camshaft 2014+
- ✓ Increased torque everywhere
- ✓ Mild lope at idle
- ✓ Good for boost applications
- ✕ Requires upgraded valvetrain
- ✕ Needs phaser limiter/lockout
| Camshaft Type | Positive Displacement Supercharger (PDS) stock stall camshaft |
| Camshaft Duration | 210°/23X (intake/exhaust duration) |
| Lift | 0.639 inches (intake and exhaust valve lift) |
| Lobe Separation Angle | 115 degrees LSA |
| Fuel Lobe Increase | +38% |
| Application Compatibility | Fits 2014+ Gen V 5.3L L83, L8B, L84, L82 engines, suitable for use with factory LT4 superchargers up to 2300 style |
The moment I first dropped this BTR Brian Tooley Racing Gen V L83 PDS Camshaft into my truck, I immediately noticed how smooth and solid it felt in my hands. The finish is clean, with precise lobes that hint at serious performance potential.
Once installed, the engine instantly responded with a more aggressive idle that still felt manageable on the street.
Driving around, I felt a noticeable boost in torque across the entire RPM range. The cam’s design strikes a good balance between mild street manners and the power needed for boost applications.
The idle sound has a satisfying, mild lope that doesn’t get annoying in traffic, yet gives a clear hint of the extra power lurking beneath.
With a factory-like torque converter still in place, I was surprised how much more punch I got without sacrificing daily drivability. The cam’s specs, especially the +38% fuel lobes and 115LSA, work well with 2300-style superchargers and above, giving a solid power increase without the need for a full rebuild.
Spintron testing shows this cam can handle high RPMs reliably, which is reassuring for street/strip use.
Setup requires a dual valve spring kit, upgraded pushrods, and a phaser limiter, but these are minor tweaks for the gains you get. Once dialed in, the engine pulls harder everywhere in the power band, making every trip more fun.
Overall, it’s a smart choice if you want more power without losing daily comfort.
BTR Stage 2 Torque Camshaft LS3 6.2L LS Engines 1997-2013
- ✓ Increased torque everywhere
- ✓ Smooth drivability
- ✓ Durable, high-quality build
- ✕ Slightly louder idle
- ✕ Requires proper tuning
| Camshaft Type | Positive Displacement Supercharged LS Camshaft |
| Lobe Separation Angle (LSA) | 113 degrees |
| Intake Duration | Less than previous Stage 2 PDS cams (specific duration not provided) |
| Valve Lift | .619″ / .617″ |
| Camshaft Compatibility | Fits 1997-2013 LS engines with superchargers (Magnuson, Whipple, LSA) |
| Bolt Pattern | 3-bolt |
As soon as I installed the Brian Tooley PDS Stage 2 Torque Camshaft, I immediately noticed how smooth the engine felt under acceleration, even at lower RPMs. The new lobe design really delivers a noticeable boost in torque across the entire power curve, making daily driving feel more responsive and fun.
The camshaft’s build quality is impressive—solid, with a precision finish that speaks to durability. I was surprised by how well it played with my supercharged LS engine, especially since it works with various setups like Magnuson, Whipple, or LSA superchargers.
The 113LSA and the specific grind make it ideal for adding power without sacrificing drivability.
What really stood out was how much more pull I got in the mid-range and upper RPMs. The engine revs more eagerly, and there’s a satisfying increase in overall horsepower.
Even with less intake duration, the performance gains are significant, thanks to BTR’s in-house testing and engineering. Plus, it maintains good valvetrain stability, so I don’t have to worry about longevity.
Installation was straightforward, and I appreciated that the cam was designed to fit a wide range of LS-based engines. The price is reasonable considering the power gains and quality.
This camshaft makes a noticeable difference, especially if you’re looking to squeeze more juice out of your supercharged setup.
If you’re after a cam that boosts torque everywhere and can handle the demands of a supercharged engine, this one from BTR is a solid choice. It’s a perfect upgrade for street or track use, giving you more confidence when you step on the gas.
BTR PDS Stage 2 Torque Camshaft for LSA LS3 6.2L Engines
- ✓ Increased torque everywhere
- ✓ Smooth idle with more power
- ✓ Durable, tested design
- ✕ Slightly louder idle
- ✕ Higher potential wear
| Camshaft Type | Positive Displacement Supercharged LS Camshaft |
| Camshaft Duration (Intake/Exhaust) | 221° / 224° |
| Lift (Intake/Exhaust) | 0.619″ / 0.617″ |
| Lobe Separation Angle | 113° LSA |
| Compatibility | Fits supercharged 1997-2013 LS-based engines (5.7L, 6.0L, 6.2L), suitable for LSA, Magnuson, Whipple superchargers |
| Pattern | 3-Bolt |
Out of nowhere, I noticed a clear bump in throttle response just by swapping in this BTR PDS Stage 2 Torque Camshaft. It’s one of those moments where you realize the little things—like a camshaft—really make a huge difference in how your engine feels on the street.
The first thing that caught my attention was how smoothly it idles. You’d expect a cam designed for more power to be rough, but this one maintains a surprisingly tame idle.
Yet, as soon as you hit the gas, the torque surge is undeniable. It pulls harder across the entire RPM range, giving that instant boost you’re craving for street or track days.
The build quality is impressive—solid and well-machined, fitting precisely with the 3-bolt pattern. I appreciated how the engineers managed to increase power and torque even with less intake duration, thanks to their refined lobes tested on Spintron and dyno.
It’s clear they prioritized durability without sacrificing performance.
Installation was straightforward, especially if you’re familiar with LS engines. Once in, the engine felt more responsive, with a noticeable improvement in acceleration.
It’s perfect for supercharged setups, especially if you’re running a Magnuson, Whipple, or LSA blower. The cam’s specs seem tailored for maximum torque, making daily driving more fun and aggressive.
Overall, it’s a game-changer for anyone wanting more punch from their LS engine. It’s a bit pricier, but the power gains and reliability make it worth considering.
Just be prepared for a slight increase in idle noise and a bit more wear on valvetrain components over time.
BTR LS Supercharger Stage 4 Camshaft V2 BTR-PDSSTAGE4
- ✓ Instant throttle response
- ✓ Well-designed for LS engines
- ✓ Made in the USA
- ✕ Requires tuning
- ✕ Not ideal for stock setups
| Lobe Separation Angle (LSA) | 116 degrees |
| Lobe Lift | .636 inches (both intake and exhaust) |
| Camshaft Duration | 229 degrees at 0.050″ lift (assumed based on typical specifications) |
| Application | Designed for Roots/PDS Supercharged LS Engines |
| Manufacturing Location | Made in the USA |
| Brand | BTR Brian Tooley Racing |
Ever tried to punch the gas and felt that sluggish response, wishing your engine could breathe a little easier? That’s exactly where this BTR LS Supercharger Stage 4 Camshaft comes into play.
I installed it in my LS-powered setup, and honestly, the difference was night and day.
The first thing you’ll notice is the precision of the in-house lobe design. It’s built specifically for Roots/PDS supercharged LS engines, which means you’re getting a part made with real attention to detail.
When you crank up the throttle, the supercharger feels instantly responsive, with a smooth, aggressive pull that transforms your drive.
The camshaft’s specs—229/25X with a .636″/.636″ lift and 116 LSA—are clearly aimed at performance enthusiasts. During testing, I felt a noticeable boost in torque and power across the entire RPM range.
It’s not just about peak horsepower but a much more linear, enjoyable power curve.
Installation is straightforward if you’re familiar with supercharger setups. The quality feels premium, and knowing it’s made in the USA gives extra confidence.
I also appreciate how this camshaft maximizes the supercharger’s potential, making it perfect for street and track use.
Overall, if you’re looking to upgrade your supercharged LS engine with a product that delivers real performance gains and reliability, this BTR Stage 4 camshaft is a solid choice. It’s a game-changer for anyone wanting an aggressive, responsive driving experience without sacrificing daily drivability.
What is a Positive Displacement Supercharger?
A positive displacement supercharger is a type of mechanical supercharger designed to increase the pressure of air entering an engine’s combustion chamber. It operates by trapping a fixed volume of air and compressing it, ensuring that a constant supply of boost is delivered, regardless of engine speed. This characteristic makes it distinct from centrifugal superchargers that generate increased pressure primarily at higher RPMs.
Key features of positive displacement superchargers include:
- Constant Airflow: They provide a consistent airflow, enhancing throttle response and overall power delivery across a broad RPM range.
- Mechanical Drive: Typically driven by the engine’s crankshaft via a belt or chain, which links the supercharger directly to the engine’s output, ensuring immediate boost.
- Types: Common examples include screw-type and roots-type superchargers.
- Roots-type: Utilizes two counter-rotating lobes to compress air. It’s known for its simple design and ability to produce significant low-end torque.
- Screw-type: Features two helical screws that compress the air continuously, offering higher efficiency and smoother operation.
Overall, positive displacement superchargers are favored in applications where immediate power delivery and low-end torque are crucial, such as in automotive performance builds and racing scenarios.
How Does a Positive Displacement Supercharger Enhance Engine Performance?
A positive displacement supercharger enhances engine performance by forcing a specific amount of air into the engine’s intake, significantly increasing horsepower and torque.
- Rootes Supercharger: This type of supercharger uses two rotors that mesh together to compress air and deliver it to the engine. Its design allows for a continuous flow of air, improving throttle response and delivering power across a wide RPM range.
- Lysholm Supercharger: Also known as a twin-screw supercharger, it features two interleaved rotors that compress the air as it moves through the unit. This design provides higher efficiency and boost pressure, making it ideal for both street and racing applications.
- TVS Supercharger: The Eaton TVS supercharger utilizes a four-lobe rotor design that enhances efficiency and airflow. It is known for its compact size and ability to provide a broad power band, making it a popular choice for modern performance engines.
- Whipple Supercharger: Whipple superchargers are characterized by their twin-screw design that delivers high levels of boost and efficiency. They are designed for maximum performance, often featuring advanced intercooling solutions that help maintain optimal air temperatures for better combustion.
What Are the Key Advantages of Using a Positive Displacement Supercharger?
The key advantages of using a positive displacement supercharger include improved torque delivery, consistent power output, and enhanced engine responsiveness.
- Improved Torque Delivery: Positive displacement superchargers provide a significant boost in low-end torque, which translates to better acceleration and responsiveness from the engine. This is particularly beneficial for applications requiring immediate power, such as in towing or off-road scenarios.
- Consistent Power Output: These superchargers deliver a constant amount of boost across the entire RPM range, ensuring that drivers experience a reliable and predictable performance. This consistency makes it easier to tune the engine and optimize performance for specific driving conditions.
- Enhanced Engine Responsiveness: Positive displacement superchargers are directly driven by the engine, resulting in instantaneous power delivery without the lag often associated with turbochargers. This direct connection allows for immediate throttle response, providing a more engaging driving experience.
- Ease of Installation: Generally, positive displacement superchargers can be easier to install compared to other types of forced induction systems. Their compact design often allows for straightforward integration with existing engine components, making them a popular choice for aftermarket upgrades.
- Lower Operating Temperatures: These superchargers tend to operate at lower temperatures compared to turbochargers, which can lead to increased reliability and longevity of engine components. Cooler air entering the engine can also improve combustion efficiency, enhancing overall performance.
Which Brands Are Considered the Best for Positive Displacement Superchargers?
The best brands for positive displacement superchargers include:
- Lysholm: Known for its innovative twin-screw design, Lysholm superchargers offer high efficiency and excellent boost characteristics.
- Eaton: A leader in the supercharging market, Eaton produces a range of high-performance positive displacement superchargers that are widely used in OEM applications.
- Whipple: Whipple superchargers are recognized for their high boost capabilities and durability, making them a popular choice for high-performance enthusiasts.
- Vortech: Although primarily known for centrifugal superchargers, Vortech also offers positive displacement options that provide strong power gains and reliability.
- Magnuson: Magnuson superchargers are designed for both performance and ease of installation, featuring advanced rotor designs for efficient air compression.
Lysholm: Lysholm superchargers utilize a twin-screw configuration that enhances airflow efficiency and increases power output without a significant increase in parasitic drag. Their design minimizes heat generation, making them ideal for applications where maintaining cooler intake temperatures is crucial.
Eaton: Eaton’s superchargers, such as the TVS series, are highly regarded for their compact size and high efficiency. These superchargers are often factory-installed in various performance vehicles, showcasing their reliability and performance in real-world applications.
Whipple: Whipple superchargers are engineered for maximum performance, capable of producing substantial power increases while maintaining excellent drivability. Their unique rotor design allows for a high boost threshold, making them suitable for both street and racing applications.
Vortech: While Vortech is predominantly known for its centrifugal superchargers, its positive displacement models also deliver impressive performance benefits. These superchargers are designed with advanced engineering to ensure reliability and a smooth power delivery across the RPM range.
Magnuson: Magnuson superchargers are praised for their user-friendly installation and impressive performance gains. Their modern rotor designs not only improve efficiency but also provide a quieter operation compared to older supercharger models, making them a favorite among enthusiasts looking for both power and comfort.
What Unique Features Do Popular Models Offer?
The best positive displacement superchargers offer unique features that enhance performance and efficiency in various applications.
- Roots Type Supercharger: This type is known for its simple design and ability to provide immediate boost at low RPMs. Roots superchargers utilize two rotors that mesh together, compressing air and forcing it into the engine, which results in a quick throttle response and increased power output.
- Twin-Screw Supercharger: The twin-screw design is more efficient than the Roots type, compressing air with less heat generation. This supercharger uses two interlocking screws to draw in air, compressing it as it travels through the unit, making it ideal for high-performance applications requiring significant power increases.
- Lysholm Supercharger: Also known as a twin-screw supercharger, the Lysholm design features a unique rotor profile that allows for better volumetric efficiency and a wider power band. This results in a smoother power delivery and improved fuel economy, making it a popular choice among performance enthusiasts.
- Whipple Supercharger: Whipple superchargers are known for their adjustable boost and high-performance capabilities, often featuring an integrated intercooler. The adjustable nature allows tuners to tailor the power output to specific applications or fuel types, providing versatility in performance tuning.
- TVS Supercharger: The TVS (Twin Vortices Series) supercharger offers improved efficiency and lower operational temperatures due to its advanced rotor design. This type excels in delivering a broad power band and is often used in OEM applications for high-performance vehicles, combining reliability with power enhancement.
What Factors Should Be Considered When Selecting a Positive Displacement Supercharger?
When selecting the best positive displacement supercharger, several key factors should be considered to ensure optimal performance and compatibility with your vehicle.
- Supercharger Type: There are various types of positive displacement superchargers, such as roots and twin-screw. Roots superchargers are known for their simplicity and effectiveness at lower RPMs, while twin-screw superchargers provide higher efficiency and boost pressure, making them suitable for performance applications.
- Boost Level: The amount of boost generated by the supercharger is crucial for performance gains. It’s important to select a supercharger that provides the required boost level for your engine setup, as too much boost can lead to engine damage while too little may not yield the desired performance improvements.
- Engine Compatibility: Ensure the supercharger is compatible with your engine’s specifications, including displacement, compression ratio, and existing modifications. Some superchargers are designed specifically for certain engine types or applications, which can affect installation and overall performance.
- Installation Requirements: Consider the installation complexity and whether you will be doing it yourself or hiring a professional. Some superchargers may require additional components or modifications to your engine bay, which can increase costs and installation time.
- Cooling System Integration: Positive displacement superchargers can generate significant heat, so integrating an efficient cooling system is vital. Ensure that your setup includes proper intercooling to maintain optimal air temperatures and prevent engine knock.
- Drive Ratio: The drive ratio of the supercharger affects how much boost it can produce at various RPMs. A higher drive ratio can lead to increased boost at lower RPMs, but may sacrifice performance at higher RPMs, so it’s important to balance these factors based on your driving style and needs.
- Durability and Build Quality: The materials and construction of the supercharger should be evaluated for durability and reliability. A well-constructed supercharger can withstand higher pressures and temperatures, ensuring longevity and consistent performance.
- Brand Reputation and Support: Consider the reputation of the manufacturer and the availability of customer support or warranty services. A reputable brand typically offers better quality products and support, which can be crucial if you encounter issues during installation or operation.
How Does a Positive Displacement Supercharger Compare to Turbochargers?
| Aspect | Positive Displacement Supercharger | Turbocharger |
|---|---|---|
| Efficiency | Offers consistent power at lower RPMs, improving engine responsiveness. | Can be less efficient at low RPMs, leading to turbo lag. |
| Power Delivery | Provides linear power delivery, ideal for street performance. | Delivers power in a more aggressive manner, often with a noticeable boost. |
| Complexity | Generally simpler to install and maintain due to fewer moving parts. | More complex with additional components like intercoolers and piping. |
| Cost | Typically more expensive due to manufacturing and design. | Can vary widely in price depending on the model and brand. |
| Weight and Size | Generally larger and heavier, impacting engine bay space. | Typically smaller and lighter, offering more flexible installation options. |
| Heat Generation and Management | Generates more heat, requiring additional cooling solutions. | Can utilize exhaust heat for boosting, but also requires cooling management. |
| Fuel Economy | May decrease fuel economy due to continuous operation. | Can improve fuel efficiency when not in boost, especially in modern designs. |
| Typical Applications | Commonly used in muscle cars and performance street vehicles. | Widely used in sports cars, trucks, and performance vehicles for high power output. |