HOLLEY 6R-5263B Cfm
fits model: 650.
( Brand: Holley ), ( Manufacturer Part Number: 6R-5263B ), ( Choke Type: Electric ), ( Type: Carburetor ), ( Material: Aluminum ), ( Features: Down Draft ), ( Country/region Of Manufacture: United States )
Review HOLLEY Used Cfm fits 650
The Holley 6R-5263B is a high-performance carburetor designed for enthusiasts seeking to enhance the fuel delivery system of their hot rods, muscle cars, or custom-built vehicles. This carburetor is a part of Holley's 6-71 series, which is renowned for its reliability, ease of tuning, and impressive power output.
The Holley 6R-5263B boasts a substantial 650 CFM (cubic feet per minute) airflow capacity, making it a suitable choice for engines ranging from small-block Chevy to big-block Ford applications. This carburetor is equipped with a 2-gross inch bore size, which facilitates a smooth and consistent fuel mixture for optimal engine performance.
One of the most impressive features of the Holley 6R-5263B is its adjustable secondaries, which can be fine-tuned to cater to various engine configurations and driving conditions. The secondary emulsion tubes can be adjusted via a simple screw, allowing you to fine-tune the fuel mixture for maximum power and efficiency. Additionally, the primary jets are also adjustable, allowing for easy tuning of the base fuel mixture.
The Holley 6R-5263B comes with a built-in electric choke system, ensuring a reliable starting experience, even in cold weather conditions. The choke plate is controlled by a 6-inch electric solenoid, which can be activated via a switch or an integrated ignition switch. This feature is particularly useful for vehicles with electric fuel pumps, as it eliminates the need for a manual choke.
Another noteworthy feature of the Holley 6R-5263B is its vacuum secondary system. This system uses a vacuum-operated secondary diaphragm to control the fuel flow to the secondary throats. As engine vacuum increases, the diaphragm opens, allowing more fuel to flow to the secondary throats for improved power and torque at high RPMs.
The Holley 6R-5263B is meticulously crafted from high-quality materials, ensuring durability and longevity. Its cast aluminum construction not only adds to its aesthetic appeal but also provides excellent heat dissipation properties, which is essential for maintaining optimal engine performance. Furthermore, the carburetor is equipped with a baffled floating bowl, which helps to reduce fuel sloshing and prevent fuel starvation during hard acceleration.
In summary, the Holley 6R-5263B is a high-performance carburetor that delivers impressive power output, ease of tuning, and reliability. Its adjustable secondary emulsion tubes, built-in electric choke system, and vacuum secondary system make it a versatile and efficient choice for hot rods, muscle cars, and custom-built vehicles. With its robust cast aluminum construction, the Holley 6R-5263B is a worthy investment for any enthusiast seeking to elevate their vehicle's fuel delivery system.
The Holley 6R-5263B is a 650 CFM double-pump carburetor widely used in hot rods and performance applications. Here are some pros and cons to help you make an informed decision about purchasing this carburetor:
Pros:1. High CFM Rating: The 650 CFM rating makes it suitable for large engines and high-performance applications.
2. Double-Pumper Design: This design allows for increased fuel flow, which is essential for high-performance engines.
3. Adjustable Features: It offers various adjustable features, including idling mixture, main jets, power valves, and accelerator pumps, allowing for fine-tuning to specific engine requirements.
4. Robust Construction: The carburetor is built with a heavy-duty aluminum base and baffled air inlets to ensure longevity and stable performance.
5. Wide Compatibility: It can be used with various fuel systems, including E85 and methanol, making it a versatile choice for various applications.
Cons:1. Complexity: The carburetor's double-pumper design and numerous adjustable features can make it more challenging to install and tune compared to single-pumper carburetors.
2. Cost: The Holley 6R-5263B is a premium carburetor, and its price reflects its high-performance capabilities and advanced features.
3. Fuel Consumption: Due to the increased fuel flow, this carburetor may consume more fuel than some single-pumper carburetors, which could lead to higher operating costs.
4. Maintenance: The complex design may require more frequent maintenance to ensure optimal performance.
In conclusion, the Holley 6R-5263B is an excellent choice for those seeking a high-performance carburetor for large engines. Its double-pumper design, adjustable features, and robust construction make it a popular choice among hot rod and high-performance enthusiasts. However, its complexity, cost, potential for higher fuel consumption, and maintenance requirements are important considerations.
Based on the information provided, if you are looking for a high-performance carburetor for a large engine and are willing to invest in the installation, tuning, and maintenance, the Holley 6R-5263B would be a great choice for you. However, if you are on a budget or prefer a simpler carburetor, other options may be more suitable for your needs.
Details:
Came off a 305 originally don't know much about it everything looks good on. Looks to have been rebuilt.
part #: 6r5263b prices
- $99.95-$440.00
specifications carbcoon:
- for models: 650
- brand: Holley
- mpn: 6r-5263b
- choke type: Electric
- type: Carburetor
- material: Aluminum
- features: Down Draft
- country/region of manufacture: United States
general carbcoon:
- condition: Used
- Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
seller carbcoon:
- rating: 100.0%
- # reviews: 81
- city: Paris, Arkansas
returns carbcoon:
- policy: No Returns
offer carbcoon:
- availability: In Stock
- sold: 0
- started: June 6, 2025
- options: Ship-to-home
- best offers: True
- quantity: 1
payments carbcoon:
- wallet: Paypal
- other
- credit card: Visa
shipping carbcoon:
- cost: $20.66
- service: USPS Priority Mail
- type: Calculated
- class: Expedited
- transit: 4-10 Days
- carrier: USPS
Holley 6R-5263B Is Similar To:
- Holley 1850-3 Carburetor 4 Barrel 600 Cfm Vac Secondary Nice Rebuildable Core (34.3% similar) Many of the carbs have been rebuilt and were sitting in plastic bags, but I no history on what was done to them. It is missing a part of the electric choke. Very nice and clean vintage. Spectre fuel system accessory carburetor. The rest of it looks complete. 600 cfm vac...(May 19th, 2024)
- Holley 4360 Economaster 450 Cfm Carburetor 7454 Quadrajet Replacement Chevrolet (28% similar) List number is 7454. For sale is one 1 used Holley 4360 series 450 cfm spread bore carburetor. Verify it will fit your application prior to purchasing. Please look closely at all the pictures for condition and details. The carb is in poor shape and for parts only...(May 19th, 2024)
- Holley 1850-1 Used 4 Barrel Carburetor List 0618 600cfm Electric Choke Vacum Sec (33.3% similar) List 1850-1 0618 universal fit...(May 19th, 2024)
- Holley 80457 Warrior 600 Cfm 4160 Four Barrel Carburetor Freshly Rebuilt (31.4% similar) Freshly rebuilt genuine Holley warrior 80457 / 600 cfm model 4160 four barrel square bore vacuum secondary carburetor. There are some minor cosmetic signs of previous use like marks, nicks, scratches etc. The pictures show the actual carburetor...(May 19th, 2024)
- Holley 80458-1 Carburetor 600 Cfm Vacuum Secondaries (42.5% similar) Been sitting on the shelf after upgrading to a bigger carb so it needs new home. Polished aluminum dual feed with vacuum secondary and electric choke. Car was only driven to and from car shows...(May 20th, 2024)
- Holley 7002-1 List 650 Cfm Four 4 Barrel Carburetor Spread Bore Carb (37.5% similar) Vintage Holley carburetor...(May 20th, 2024)
- Holley 04776c 600 Cfm Double Pumper 4 Barrel Carburetor 80776 Carb With Electric Choke Use (25.4% similar) Used Holley 600 double pumper carburetor with electric choke air horn intact list number 80 776 nice physical condition as shown all linkage moves it should has been sitting for a while and gaskets are little sticky will need kit - carb is in good core color ready rebuild...(May 21st, 2024)
- Holley 4781-5 4 Bbl Carburetor List Double Pumper 850 Cfm With Dual Inlet 8an (32.4% similar) In nice condition. Choke removed for better performance...(May 21st, 2024)
- Holley Performance Products Br-67258 Quick Fuel Brawler Carburetor 770 Cfm 4150 4 Barrel Electric Choke Vacuum (23.2% similar) In good condition with dual inlet line...(May 21st, 2024)
- Holley 0-90670 670 Cfm Truck Avenger Carburetor (42.7% similar) No warranty and only ships to lower 48 states. I tore it apart and ran through an ultrasonic cleaner a couple times got super clean bought rebuild kit rebuilt. I went to use it and couldn get the secondaries work. Its in good condition and its something I m not going to use anymore...(May 21st, 2024)
- Demon Carburetion Holley Performance 1.69 1.69 Race 750 Cfm Racing Double Pumper Carburetor (26.9% similar) Demon carburetion recently 750 cfm race double pumper carburetor down leg boosters casting 40 1.69/1.69 throttle blades - removed from a circle track sportsman team former owner ran it several years ago carb is in good physical shape and clean inside out as shown primary secondary throttle...(May 21st, 2024)
