Demon Carburetion Carburetors
Explore Demon carburetors, replacement parts, rebuild kits, and tuning components for street-performance, street-and-strip, and racing applications. Demon Carburetion is now part of Holley and offers carburetor families including Street Demon, Speed Demon, and Mighty Demon, with configurations designed around different engine and vehicle requirements. Demon carburetors are known for performance-oriented airflow and tuning capabilities, with designs incorporating features such as adjustable calibration components, high-capacity fuel bowls, and performance metering systems. Behrent’s Performance Warehouse carries complete carburetors and Demon carburetor parts for new installations, repairs, maintenance, and tuning.
Shop Demon Carburetion Carburetors
Shop Demon carburetors for street, performance, and racing engines, along with rebuild kits, replacement parts, and tuning components. Compare product family, CFM rating, secondary configuration, choke type, intake fitment, and engine requirements to find the right carburetor or service parts for your application.
Item Number: DEM120098
$16.37
Usually Ships In 3-5 Business Days
Item Number: DEM140024
$16.23
Usually Ships In 3-5 Business Days
Item Number: DEM124007
$27.62
Usually Ships In 3-5 Business Days
Item Number: DEM140012
$14.70
Usually Ships In 3-5 Business Days
Item Number: DEM140026
$16.85
Usually Ships In 3-5 Business Days
Item Number: DEM140040
$28.65
Usually Ships In 3-5 Business Days
Item Number: DEM140041
$34.80
Usually Ships In 3-5 Business Days
Compare Demon Carburetors by Product Family
Demon carburetor families are designed for different engine and vehicle requirements.
| Demon product family | General application | What shoppers should confirm |
|---|---|---|
| Street Demon carburetor | Street-performance and cruising applications | CFM, choke type, intake fitment, linkage, and fuel-system requirements |
| Speed Demon carburetor | Modified street and street-and-strip engines | Engine combination, RPM range, CFM, secondary type, and tuning requirements |
| Mighty Demon carburetor | Higher-output performance and racing combinations | Engine application, CFM, fuel-system requirements, and available tuning controls |
| Road Demon and legacy models | Street-performance and legacy applications | Exact model, condition, application, and replacement-parts availability |
| Rebuild kits and parts | Repair, maintenance, and recalibration | Product family, model or part number, and exact component compatibility |
How to Choose a Demon Carburetor for Your Engine
To choose a Demon carburetor, start with the engine combination and intended use, then narrow the options by CFM, secondary configuration, and vehicle fitment. Carburetor size and configuration should work with the complete engine and fuel system.
- Choose the CFM rating: The correct carburetor size depends on engine displacement, operating RPM, airflow requirements, engine combination, and intended use. A 650-CFM carburetor flows less air than a Demon 750-CFM carburetor, while an 850-CFM model provides greater airflow capacity for engines that require it. Bigger isn’t automatically better. An oversized carburetor can reduce throttle response and drivability, while an undersized carburetor can restrict airflow at higher RPM.
- Choose the secondary type: Vacuum secondaries open according to engine demand and are commonly used in street-oriented applications. Mechanical secondaries provide direct throttle-controlled operation and may suit properly configured performance or racing combinations. Consider vehicle weight, gearing, transmission, and intended use when choosing between them.
- Confirm vehicle and intake fitment: A matching bolt pattern alone doesn’t guarantee that a Demon carburetor will fit an existing intake and vehicle without additional components or clearance considerations. Match the intake-manifold flange and bolt pattern, carburetor height and clearance, fuel-inlet configuration, throttle linkage, choke requirements, vacuum connections, and transmission controls.
- Identify an existing Demon carburetor: Use the complete model, part, or identification number whenever possible. Appearance and CFM rating may not identify the exact carburetor, which matters when ordering Demon carburetor parts, gaskets, floats, metering components, or rebuild kits.
Choosing a Demon Carburetor Rebuild Kit
Choose a Demon carburetor rebuild kit by matching it to the exact carburetor family and model or identification number. Kits may include gaskets, seals, accelerator-pump components, needle-and-seat parts, and other service items, but contents and compatibility vary by kit. Because Demon is a Holley brand, some components may appear similar to Holley parts, but that doesn’t mean all service components are interchangeable. Verify the kit or replacement part for the specific carburetor before ordering.
Setting Up and Tuning a Demon Carburetor
Fuel-pressure requirements and adjustment procedures vary by Demon carburetor model, so use the exact carburetor specifications rather than one universal setting. Before tuning, verify the fuel pressure and set the float level according to the model instructions, typically by checking the fuel level at the bowl's sight plug or sight window and adjusting the needle-and-seat assembly as specified.
Set the idle mixture only after the engine is at operating temperature and the basic idle speed, ignition timing, and float levels are correct. Adjust the idle-mixture screws according to the Demon instructions for the specific carburetor, then evaluate accelerator-pump and secondary operation before changing jets, air bleeds, or other calibration components.
Frequently Asked Questions About Demon Carburetion Carburetors
What causes a Demon carburetor to run rich, hesitate, or flood?
A rich condition, hesitation, or flooding can have several causes. Initial checks include fuel pressure and float level, choke operation, needle-and-seat condition, accelerator-pump operation, ignition timing, vacuum leaks, and carburetor calibration. Diagnose the specific symptom before changing jets or other tuning components.
Are Demon carburetor parts interchangeable?
Some Demon carburetor parts may fit more than one model, but compatibility can vary by product family, generation, CFM rating, and calibration. Verify the part number and exact carburetor model before ordering jets, metering components, baseplates, fuel bowls, or rebuild parts.