For racing and high-performance driving, the Demon Carburetor 650 delivers the fueling precision and airflow your engine needs to reach top power. This premium carburetor is engineered to optimize combustion efficiency and acceleration.

In this guide, we’ll dive into the features, benefits, and applications of the Demon Carburetor 650. We’ll also provide tips for selecting the right model and properly installing and tuning it for your vehicle. Let’s start dominating!

Overview of the Demon Carburetor 650

Demon carburetors are revered by racers and performance enthusiasts for their innovation and ability to generate more horsepower. The Demon Carburetor 650 is designed to provide:

• 650 CFM airflow capacity for increased power
• Precise fuel metering for optimized combustion
• Adjustability to customize performance
• Durability to withstand racing demands

The 650 excels at enhancing the performance of street rods, drag racers, muscle cars and any application requiring track-capable speed.

Key Features and Benefits

High Flow Volume

With a 650 CFM rating, the Demon 650 can feed engines up to 750 horsepower without restricting airflow. The extra flow prevents power loss at high RPMs.

Tunable Metering

Adjustable air bleeds, changeable idle restrictions, and tunable metering blocks allow custom fuel calibration for your engine’s needs.

Lightweight Aluminum Construction

The Demon 650 housing is CNC-machined from durable, lightweight aluminum, improving throttle response and reliability.

Removable Air Horns

The Demon 650’s removable air horns provide quick access to internal components for easy tuning and maintenance.

Clear Sight Glasses

Handy sight glasses eliminate guesswork by allowing visual monitoring of fuel levels at a glance.

Ideal Applications

Drag Racing Vehicles

The Demon 650 provides the explosive power delivery needed for quick ETs and fast 1/4 mile times by pro stock, funny car, and other dragsters.

Asphalt Circle Track Racing

The 650 delivers sustained peak power and reliable performance lap after grueling lap.

Off-Road Racing

The Demon 650 generates abundant torque and top-end pulling power critical for rock crawlers, trophy trucks, desert racers and more.

Street Performance

The 650 gives street rods and muscle cars sharper acceleration and higher horsepower for an extra edge.

Popular Demon Carburetor 650 Models

Speed Demon 650

Optimized for street and mild competition use. Features mechanical secondaries and adjustable air bleeds.

Mighty Demon 650

Maximized for racing applications. Has annular boosters and billet high-flow metering blocks.

Road Demon 650

Great for street rods and classics. Adds vacuum secondaries and electric choke for easy starts.

Installation Tips

• Carefully follow the manufacturer’s installation instructions.
• Ensure the engine is cold before starting installation.
• Use a proper high-performance gasket to prevent vacuum leaks.
• Securely connect fuel lines and check for leaks before starting engine.

Tuning Recommendations

• Start with the manufacturer’s recommended baseline calibration.
• Adjust the idle mixture screws incrementally to achieve a smooth idle.
• Use a wideband O2 sensor to help optimize the air/fuel ratio.
• Adjust the secondary linkage for crisp acceleration transition.
• Road test and fine-tune as needed for your specific engine.

Dominate with the Demon 650

The Demon Carburetor 650 is the ultimate performance carburetor designed to help dominate the track or street. Its 650 CFM flow capacity, extensive adjustability, and hardcore construction allow it to maximize power in high demand racing and street applications. Follow this guide to select the right Demon 650 model, install it properly, and tune it to victory!