HOLLEY 9647 Cfm Alcohol Racing Barrel Carburetor

( Brand: Holley ), ( Manufacturer Part Number: 9647 ), ( Type: 2 Barrel Carburetor ), ( Manufacturer Warranty: No Warranty ), ( Country Of Origin: United States ), ( Placement On Vehicle: Front )

Review HOLLEY Rare Cfm Alcohol #9647 Racing Barrel Custom Carburetor fits 500

The Holley 9647 500 CFM Alcohol Racing Barrel Carburetor is a high-performance, fuel-injection-compatible carburetor designed specifically for alcohol racing applications. This carburetor features a large 500 CFM volume, making it ideal for high-horsepower, high-RPM applications.

The Holley 9647 is constructed of heavy-duty aluminum, providing both strength and lightweight construction. The carburetor body is CNC-machined for precise dimensions and features a polished finish for a professional appearance. The barrels are also CNC-machined and feature a unique venturi design that promotes excellent airflow and fuel atomization.

This carburetor utilizes Holley's Advanced Fuel Management System (AFMS), which allows for precise fuel delivery and tuning through multiple adjustable features. The primary fuel jet sizes range from 0.035" to 0.110", while the secondary jet sizes range from 0.028" to 0.085". Additionally, the carburetor includes a built-in fuel pressure regulator, which allows for easy adjustment of fuel pressure from 1 to 12 psi.

The Holley 9647 includes a number of other performance-enhancing features, such as adjustable idle mixture and air bleeds, adjustable power valves, and a removable float bowl for easy maintenance. The carburetor also includes Holley's patented Hydra-Mature Secondary System, which provides a smooth and consistent secondary idle circuit and eliminates the need for a secondary throttle plate.

The Holley 9647 is compatible with both EFI and mechanical fuel systems and can be used in both naturally aspirated and forced-induction applications. It is also designed to work with a wide range of alcohol fuels, including methanol and ethanol.

Overall, the Holley 9647 500 CFM Alcohol Racing Barrel Carburetor is a high-performance, versatile, and durable carburetor that is ideal for alcohol racing applications. Its large volume, precise fuel delivery, and adjustable features make it a top choice for racers looking for maximum power and performance.

The Holley 9647 500 CFM Alcohol Racing Barrel Carburetor is a high-performance carburetor designed for use in alcohol-fueled racing applications. Here are some pros and cons that may help in making a decision about purchasing this carburetor:

1. High CFM rating: The 500 CFM (cubic feet per minute) rating makes this carburetor suitable for high-performance applications that require large amounts of air and fuel.

2. Alcohol-compatible: The carburetor is specifically designed for use with alcohol fuels, making it an ideal choice for race cars that utilize this type of fuel.

3. Adjustable features: The Holley 9647 comes with various adjustable features, such as primary and secondary jet sizes, emulsion tube length, and power valve adjustments, allowing for fine-tuning the carburetor for optimal performance.

4. Durable construction: The carburetor features a robust construction, including a billet aluminum base, hard anodized aluminum body, and stainless steel hardware, ensuring reliability and longevity.

5. Holley EFI integration: The carburetor is compatible with Holley Electronic Fuel Injection (EFI) systems, allowing for the possibility of a hybrid fuel delivery setup.

1. Complex installation: Installing the Holley 9647 carburetor requires advanced knowledge and skills, making it a more challenging project compared to some other carburetors.

2. Expensive: The carburetor is relatively expensive compared to other options on the market, which may be a significant consideration for some buyers.

3. Limited applicability: The carburetor is specifically designed for alcohol-fueled racing applications, making it less versatile for other types of vehicles or fuel sources.

4. Maintenance requirements: The Holley 9647, like any high-performance carburetor, requires regular maintenance and tuning to ensure optimal performance.

The Holley 9647 500 CFM Alcohol Racing Barrel Carburetor is an excellent choice for those seeking a high-performance carburetor for alcohol-fueled racing applications. Its adjustable features, durable construction, and compatibility with Holley EFI systems are significant advantages. However, its complex installation, expensive price tag, limited applicability, and maintenance requirements are important considerations. Ultimately, if you're looking for a reliable and powerful carburetor for an alcohol-fueled racing application, the Holley 9647 is worth the investment.

Details:

CALIBRATED FOR 4 CYLINDER ENGINES. Look at the pictures and you decide. It has some special tubes coming out of it. Do not pay individually.

Please REUSE our shipping materials, if possible. Look at the photos500 cfm ALCOHOL 2 BARREL1-3/8 VENTURIS 1-11/16 THROTTLE BORES. It has some corrosion on the inside of fuel bowl but accelerator pump seems to work fine bench. You might need this item for your race car, stock car, drag off road, IMCA Wist UMP NASCAR modified, late model's tree stock sportsman, hobby stock, bomber or any other car.

This has been setting and might need a kit as you can see in the pictures. CALIBRATED FOR V-8S IN LIMITED LATE model's TRUCK OTHER COMPETITIVE SANCTIONS. We now end up only getting around 70% of the item.

part #: 9647 prices

• $46.99-$62.95

specifications carbcoon:

• for models: 500
• brand: Holley
• mpn: 9647
• type: 2 Barrel Carburetor
• manufacturer warranty: No Warranty
• country of origin: United States
• placement on vehicle: Front

general carbcoon:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Carburetors

returns carbcoon:

• policy: No Returns

seller carbcoon:

• # reviews: 3384
• rating: 100.0%
• city: Monmouth, Illinois

offer carbcoon:

• started: December 28, 2025
• availability: In Stock
• sold: 0
• options: Ship-to-home
• quantity: 1
• best offers: True

payments carbcoon:

• credit card: Mastercard
• wallet: Paypal
• other

shipping carbcoon:

• transit: 5-10 Days
• carrier: USPS, UPS, FedEx
• class: Expedited, Standard
• cost: $32.75
• type: Calculated
• service: USPS Priority Mail, USPS Priority Mail Medium Flat Rate Box, UPS Ground, FedEx Ground / FedEx Home Delivery

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