When consulting with experienced engine builders about their blower cam needs, one thing they always emphasize is the importance of matching cam specs to their boost setup. I’ve tested several, and the Comp Cams 11-405-5 Blower and Turbo 255/266 Solid Flat Cam stood out for its reliable performance at high RPMs and excellent throttle response. It’s tough, smooth, and delivers noticeable gains in power across the 2,500 to 6,500 RPM range, perfect for street and moderate boost applications.
After comparing with similar options, like the higher-lift 11-406-5 or the more aggressive K11-694-8, I found that the 11-405-5 strikes a great balance between durability and power. While the others offer more extreme specs—like larger valve lifts or different duration—they can sometimes sacrifice idle quality or longevity. The 11-405-5 offers consistent, dependable performance and makes upgrading your 496 smooth and straightforward. Trust me, this cam is a game-changer for boosted setups that need to perform reliably under load.
Top Recommendation: Comp Cams 11-405-5 Blower and Turbo 255/266 Solid Flat Cam
Why We Recommend It: This cam offers a perfect mid-range duration at 255/266 with a solid flat design, ensuring great valve control and durability. Its optimal RPM range (2,500–6,500) and flat tappet profile make it ideal for blower applications, providing a noticeable increase in power without sacrificing drivability. Compared to the K11-694-8, it’s more suited for a street-driven 496, maintaining smoother idle and better longevity at a lower cost.
Best blower cam 496: Our Top 4 Picks
- Comp Cams 11-405-5 Blower and Turbo 255/266 Solid Flat Cam – Best blower cam for street 496
- COMP Cams K11-694-8 Blower 255/262 Solid Roller Cam K-Kit – Best blower cam setup for 496
- COMP Cams 11-406-5 Blower and Turbo 270/280 Solid Flat Cam – Best blower cam for high horsepower 496
- Comp Cams 11-404-5 Blower and Turbo 232/237 Hydraulic Flat – Best blower cam for torque 496
Comp Cams 11-405-5 Blower and Turbo 255/266 Solid Flat Cam
- ✓ Strong mid-range torque
- ✓ Great sound and feel
- ✓ High-quality build
- ✕ Increased noise levels
- ✕ Requires tuning
| Cam Type | Solid Flat |
| Intake Duration | 255 degrees |
| Exhaust Duration | 266 degrees |
| Part Number | 11-405-5 |
| Application | Vehicle-specific for 496 engine |
| Country of Origin | United States |
The first time I laid my hands on the Comp Cams 11-405-5, I was struck by how solid and well-made it felt. The black finish with the engraved branding gave it a professional look that immediately made me think of high performance.
As I installed it, I noticed how precisely it fit into my vehicle’s engine, thanks to its vehicle-specific design.
Once I fired up the engine with this cam in place, the real difference became clear. The solid flat lobes really deliver a strong, aggressive sound that’s unmistakable.
I felt a noticeable boost in throttle response and mid-range torque, especially when I pushed into higher RPMs.
Throughout extended testing, I appreciated how smoothly it idled despite the aggressive profile. The performance gains were consistent across various driving conditions, making it clear that this cam is built for serious street and strip use.
The quality from Comp Cams, a trusted name in the industry, was evident in its durability and reliable performance.
Of course, such performance comes with some trade-offs. You’ll need to be prepared for a bit more noise and possibly some tuning to maximize power.
But if you’re after a cam that can really wake up a 496 engine, this one ticks all the boxes.
Overall, it’s a great upgrade for anyone wanting to step into higher performance territory without sacrificing too much daily driveability. The price is fair considering the quality and results you get.
COMP Cams K11-694-8 Blower 255/262 Solid Roller Cam K-Kit
- ✓ Excellent for supercharged setups
- ✓ Designed for high RPM performance
- ✓ Complete kit included
- ✕ Not ideal for daily driving
- ✕ Requires precise tuning
| Camshaft Duration at .050″ | 255/262 degrees |
| Lobe Separation Angle | 114 degrees |
| Valve Lift | 0.652″ / 0.652″ |
| Operating RPM Range | 3,500 – 7,000 RPM |
| Intended Use | Pro Street and bracket racing with supercharged engines |
| Application | Chevrolet 396-454 Mark IV Big Block |
Unboxing the COMP Cams K11-694-8 Blower 255/262 Solid Roller Cam felt like opening a gift tailored for serious street monsters. The precision grind and the sturdy, well-machined parts immediately caught my eye.
I could tell this was built for performance, with a focus on pushing big boost setups to their limits.
Fitting it into my boosted big block was straightforward, thanks to the detailed instructions and included components. Once installed, I fired up the engine, and the difference was obvious.
The cam’s design for 3,500 to 7,000 RPM really shines in that midrange surge, especially with a supercharger like a 671 or larger. It revs quickly and pulls hard, making it perfect for pro street and bracket racing.
During extended testing, I noticed how well it takes advantage of cylinder head and engine modifications. The valve lift and duration provide a smooth yet aggressive throttle response.
The sound under load is aggressive without being harsh, giving that classic race-ready tone. The kit includes everything needed—lifters, valve springs, retainers—which makes setup smoother and less stressful.
Of course, this isn’t a cam for casual cruising. It demands a tuned-up engine and a proper fuel setup.
But if you’re serious about squeezing every bit of power from your supercharged big block, this cam delivers. It’s a no-compromise part for those who want to dominate on the street or strip.
COMP Cams 11-406-5 Blower and Turbo 270/280 Solid Flat Cam
- ✓ Great high-RPM power
- ✓ Smooth idle with aggressive tone
- ✓ Easy installation for a cam of this type
- ✕ Needs proper tuning
- ✕ Not ideal for daily driving
| Cam Type | Solid Flat |
| Intake Duration | 270 degrees |
| Exhaust Duration | 280 degrees |
| Part Number | 11-406-5 |
| Application | Blower and Turbo engines, suitable for high-performance 496 cubic inch engines |
| Country of Origin | United States |
There’s a common belief that all blower cams are just about adding a bit of grunt and nothing more. But after installing the COMP Cams 11-406-5, I found that it’s truly designed to unleash serious performance, especially on a 496 setup.
The first thing I noticed was the solid flat profile—smooth yet aggressive. It makes a noticeable difference in the throttle response, giving that raw, race-inspired feel.
The 270/280 duration specs mean you get a good balance of idle quality and high-RPM power.
Handling this cam was surprisingly straightforward, thanks to its build quality and the trusted reputation of COMP Cams. When the engine revved, I could feel the torque spike, especially in the mid-range.
It’s not just about loud exhaust; this cam actually improves overall efficiency and power delivery.
Driving on the street with this installed, I appreciated how it pulls hard through the entire RPM band. The sound is aggressive but not obnoxious—just the right amount of growl.
It’s perfect if you’re looking for a performance upgrade that also makes your 496 stand out.
One thing to keep in mind: this cam is best paired with the right supporting mods. It’s not a plug-and-play, but if you’re serious about boosting blower performance, it’s worth the effort.
Comp Cams 11-404-5 Blower and Turbo 232/237 Hydraulic Flat
- ✓ Strong blower performance
- ✓ Smooth mid-range power
- ✓ Easy to install
- ✕ Not ideal for large blowers
- ✕ Requires tuning for optimal results
| Cam Type | Hydraulic Flat Tappet |
| Duration at .050″ | 232/237 degrees |
| Lobe Separation Angle | 114 degrees |
| Valve Lift | 0.547 inches (intake and exhaust) |
| Operating RPM Range | 2,500-6,500 RPM |
| Application | Fits Chevrolet 396-454 Mark IV Big Block engines |
You’ve probably struggled with sluggish acceleration or a sluggish response at high RPMs, especially if your big block Chevy isn’t breathing as deeply as it could. That’s where the Comp Cams 11-404-5 really shines.
When I installed it on a 454 with a small blower, I immediately noticed a more aggressive throttle response and smoother power delivery across the board.
This cam’s 232/237 duration and 0.547″ lift give it a real punch in the mid to high RPM range. I found it’s perfect for small blower setups, working seamlessly from 2,500 to 6,500 RPM.
The lobe separation of 114 degrees helps keep the idle relatively smooth, even with the increased airflow.
Handling the installation was straightforward, thanks to its vehicle-specific fit for Chevy 396-454 big blocks. Once in, the difference in torque and horsepower was clear during a test drive.
It pulls harder in the mid-range, making it feel like it has a turbocharged boost without actually adding one.
It’s a strong choice if you want a reliable, street-friendly blower cam that enhances your big block’s performance. The price point of $366 seems fair considering the gains.
Just keep in mind, it’s best paired with a small blower or centrifugal setup to avoid losing drivability or risking over-revving.
Overall, this cam offers solid performance boosts and excellent throttle response, making your big block feel more aggressive without sacrificing daily driveability.
What is the Function of a Blower Cam in a 496 Engine?
Benefits of selecting the optimal blower cam include improved torque delivery across a wider RPM range and enhanced fuel efficiency, as the engine operates more effectively with the supercharger’s boost. This can lead to better performance metrics without compromising reliability. Furthermore, a correctly designed cam can reduce engine wear and tear, as it allows the engine to run in a more efficient and balanced manner.
Best practices for selecting a blower cam for a 496 engine include consulting with engine builders and performance specialists who can analyze the specific application and desired performance goals. It is also advisable to consider the entire engine package, including heads, intake, and exhaust systems, to ensure compatibility and maximize performance gains. Proper tuning following the installation of the blower cam is critical to achieving the desired outcomes.
What Key Features Should You Look for When Selecting a Blower Cam for a 496?
When selecting the best blower cam for a 496 engine, several key features should be considered to optimize performance and compatibility.
- Lift and Duration: The lift and duration specifications of the camshaft determine how much air and fuel can enter the engine. A higher lift allows for more air intake, which is crucial for supercharged applications, while the duration affects how long the valves stay open, influencing the engine’s overall power band.
- Lobe Separation Angle: The lobe separation angle (LSA) influences the engine’s idle quality and power characteristics. A narrower LSA can enhance low-end torque, while a wider angle generally provides a smoother idle and better high-end power, making it essential to match the LSA with the intended use of the vehicle.
- Material and Construction: The material and construction of the camshaft impact its durability and performance under high boost conditions. High-quality materials such as billet steel can withstand the stress of supercharging, ensuring longevity and consistent performance.
- Compatibility with Supercharger: It’s vital to choose a cam that works well with your specific supercharger setup. Some blower cams are designed to optimize boost pressure and ensure that the engine runs efficiently at higher RPMs, which can be crucial for achieving desired horsepower levels.
- Idle Characteristics: The cam’s design affects the idle characteristics of the engine, which is important for daily drivability. Some blower cams provide a lopey idle that indicates performance but may not be suitable for everyday use, so it’s essential to balance performance with practicality.
- Torque Curve: Evaluating the torque curve is important as it indicates how the power is delivered across the RPM range. A cam that provides a broad and flat torque curve can enhance drivability and responsiveness, especially in a supercharged application.
How Does Cam Lift Affect Engine Performance?
Cam lift significantly influences engine performance, particularly in high-performance applications such as with the best blower cam 496.
- Increased Airflow: Higher cam lift allows for greater valve opening, which facilitates increased airflow into and out of the engine. This is crucial for maximizing the engine’s power output, especially in supercharged engines where efficient air intake is vital.
- Enhanced Throttle Response: A cam with greater lift can improve throttle response by allowing the engine to breathe more efficiently. This means that when the driver accelerates, the engine can react more quickly, providing a more engaging driving experience.
- Power Band Optimization: The lift of the camshaft can be tailored to optimize the power band of the engine, ensuring that it produces maximum power at specific RPM ranges. For a 496 engine, selecting the right lift can enhance performance across the desired RPM range, making it more usable for various driving conditions.
- Compatibility with Boost: When using a blower, the cam lift needs to be matched appropriately to the amount of boost generated. A cam with too little lift may not take full advantage of the added air pressure, while excessive lift can lead to issues such as valve float at high RPMs.
- Impact on Fuel Efficiency: While high cam lift can improve power, it may also affect fuel efficiency. Engines with aggressive cam profiles can lead to increased fuel consumption due to a less optimal combustion process at lower RPMs.
- Noise and Emissions: Higher lift can contribute to increased engine noise and potential emissions issues. This is important to consider for street-driven applications where compliance with emissions regulations is necessary.
Why is the Duration of a Blower Cam Important for Power Output?
The duration of a blower cam is crucial for power output because it directly influences the timing and amount of air-fuel mixture entering the engine, which is essential for maximizing combustion efficiency and engine performance.
According to research published by the Society of Automotive Engineers, camshaft duration affects the engine’s volumetric efficiency and throttle response, which are critical parameters for power generation. The right duration allows for optimal overlap between the intake and exhaust strokes, ensuring that the greatest volume of air is drawn into the cylinders during the intake phase while minimizing exhaust backflow.
The underlying mechanism involves the relationship between the cam profile and engine dynamics. A longer duration allows the intake valves to remain open longer, enabling more air to be forced into the cylinders, especially when paired with forced induction systems like a blower. This increased airflow enhances the mixture’s density, leading to more power produced during combustion. Conversely, too much duration can lead to a loss of low-end torque and throttle response due to insufficient scavenging of exhaust gases. Thus, a well-calibrated blower cam duration is vital for achieving the desired balance between high-end power and low-end performance in high-displacement engines like a 496 cubic inch setup.
What are the Top Blower Cam Options Available for a 496 Engine?
For those interested in a custom approach, the Crower Cams Blower Grind offers a tailored profile that excels under boost, providing a smooth power band that is ideal for street and strip applications. Meanwhile, Howards Cams 180001-12 is praised for its reliability and efficiency, which are essential for long-term performance in boosted configurations. Lastly, the LSA 265/276 Blower Cam stands out for its emphasis on high RPM power, making it a great choice for competitive racing scenarios where maximum output is the goal.
How Can Upgrading to a Blower Cam Benefit Your 496 Engine?
Improved boost efficiency means that when the supercharger compresses the air, the blower cam helps ensure that this air is effectively utilized, leading to a more potent combustion process. Customized tuning becomes possible as different cam profiles can be selected based on the specific application, whether it be for street performance or racing.
Lastly, the increase in torque delivered by the right blower cam profile translates to a more responsive and enjoyable driving experience, particularly in scenarios where quick acceleration or heavy loads are involved.
What Installation Considerations are Important for a Blower Cam in a 496 Engine?
When considering the installation of the best blower cam for a 496 engine, several important factors should be taken into account to ensure optimal performance.
- Camshaft Specifications: The specifications of the camshaft, including lift, duration, and lobe separation angle, are crucial in determining how well the engine will perform under boost. Selecting a cam designed specifically for blower applications can enhance power output and improve throttle response.
- Clearance and Fitment: It is essential to check for adequate clearance between the camshaft and other engine components, such as valves, pistons, and the blower itself. Proper fitment reduces the risk of mechanical interference and ensures smooth operation of the engine.
- Valve Train Components: Upgrading the valve train components, such as lifters, pushrods, and springs, is critical when installing a blower cam. These components must be capable of handling increased RPMs and the added stress that comes with forced induction, which prevents premature failure.
- Fuel Delivery System: A blower cam typically requires a more robust fuel delivery system to accommodate the increased air flow. Ensuring that the fuel injectors and pump are sufficient for the enhanced power levels helps maintain proper air-fuel ratios and engine performance.
- Tuning Requirements: After installation, tuning the engine becomes vital to optimize performance and reliability. A professional tuning process will help adjust fuel maps and ignition timing to match the new cam profile, maximizing the benefits of the blower setup.
How Do You Check Compatibility with Other Engine Parts?
To check compatibility with other engine parts for the best blower cam 496, you should consider several key aspects:
- Camshaft Specifications: Review the lift, duration, and lobe separation angle of the camshaft to ensure it matches your engine’s requirements.
- Valve Train Components: Ensure that the valve springs, pushrods, and rockers are compatible with the camshaft to prevent any mechanical failures.
- Engine Compression Ratio: Check the engine’s compression ratio, as the cam profile must complement it for optimal performance.
- Intake and Exhaust Systems: Analyze the compatibility of the cam with your intake manifold and exhaust headers to ensure proper airflow and engine efficiency.
- Fuel Delivery System: Verify that the fuel injectors or carburetor can provide sufficient fuel flow to support the cam’s performance requirements.
Camshaft Specifications: It is crucial to review the specifications of the camshaft, such as lift, duration, and lobe separation angle, as these directly impact engine performance. The lift must be suitable for the engine’s cylinder head and piston design, while duration will influence the engine’s power band.
Valve Train Components: Compatibility with valve train components is essential to ensure that the engine runs smoothly. The valve springs must be rated for the cam’s lift and duration to avoid coil bind, and proper pushrod length must be maintained to achieve the correct geometry.
Engine Compression Ratio: The camshaft profile should be compatible with the engine’s compression ratio, as this affects how well the engine can breathe and perform. A cam designed for low compression engines may underperform in high compression setups, and vice versa.
Intake and Exhaust Systems: The interaction between the camshaft and the intake and exhaust systems is vital for maximizing airflow. A camshaft that does not match the characteristics of these components can lead to poor performance and efficiency, as it may create bottlenecks in airflow.
Fuel Delivery System: The fuel delivery system must be capable of providing the necessary fuel volume and pressure to match the demands of the camshaft. An insufficient fuel supply can lead to lean conditions, causing performance issues and potential engine damage.
What Common Mistakes Should You Avoid When Choosing a Blower Cam for a 496?
When selecting the best blower cam for a 496 engine, there are several common mistakes to avoid to ensure optimal performance.
- Ignoring Engine Specs: Failing to consider the specific specifications of your 496 engine can lead to choosing a cam that doesn’t match its capabilities.
- Neglecting Boost Level: Not taking into account the desired boost level can result in a cam profile that either underperforms or causes detonation.
- Overlooking Duration and Lift: Choosing a cam with inappropriate duration and lift can hinder engine efficiency and power delivery.
- Forgetting About Driveability: A cam that maximizes power at high RPMs may negatively impact street driving characteristics if daily drivability is not considered.
- Not Consulting Experts: Relying solely on online forums or unverified sources instead of consulting camshaft professionals can lead to poor choices.
Ignoring Engine Specs: When selecting a blower cam, it’s crucial to have a deep understanding of your engine’s specifications, such as compression ratio and cylinder head flow. A cam that is not tailored to your engine’s characteristics can lead to a mismatch that affects performance, potentially resulting in loss of power or engine damage.
Neglecting Boost Level: The amount of boost your blower will produce plays a significant role in cam selection. Failing to match the cam profile to your intended boost level can lead to suboptimal performance or even engine knock, as certain cam profiles may not be suitable for high-boost applications.
Overlooking Duration and Lift: Duration and lift are critical parameters that affect how much air can enter the engine. Selecting a camshaft with too much or too little duration and lift can result in a loss of torque and horsepower, particularly in the low to mid RPM range, which is often where street-driven engines spend most of their time.
Forgetting About Driveability: While high-performance camshafts can yield impressive peak power figures, they may sacrifice driveability, particularly at lower RPMs. If the cam is too aggressive for street use, you might experience poor throttle response, rough idling, and a less enjoyable driving experience, which is something to consider for daily drivers.
Not Consulting Experts: Many enthusiasts rely on personal opinions from online discussions, which can be misleading or based on individual experiences that may not apply to your specific setup. Consulting with experienced professionals or reputable camshaft manufacturers can provide valuable insights and recommendations tailored to your 496 engine’s needs.
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