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  3. HOLLEY R-634-A

HOLLEY R-634-A Nos Carburetor Autocar Engine 447 C70-T C70-64

fits model: C70, C70d.

R-634-a Holley New Nos Carburetor Autocar 447 Engine C70 C70d C70-t C70-64

( Brand: Holley ), ( Manufacturer Part Number: R-634-A ), ( Choke Type: Carburetor ), ( Oe/oem Part Number: 6af-050 Autocar ), ( Vintage Part: Yes ), ( Universal Fitment: No ), ( Country/region Of Manufacture: United States )

Review HOLLEY New Nos Carburetor Autocar 447 Engine fits C70 C70D

The Holley R-634-A NOS Carburetor is a high-performance racing carburetor specifically designed for use with Autocar Engines model 447, including variations such as the C70, C70D, C70-T, and C70-64. This carburetor is part of Holley's NOS (Nitrous Oxide Systems) line, which ensures optimal fuel delivery in high-performance applications where increased horsepower and torque are essential.

The R-634-A carburetor features a 634 CFM double pumper design, which provides excellent airflow for large engines. It is constructed from durable aluminum and comes with a baffled base to help prevent fuel surge and ensure consistent fuel delivery. The carburetor also includes a built-in fuel pressure regulator to maintain the correct fuel pressure for optimal engine performance.

The Holley R-634-A NOS Carburetor is designed with a four-barrel configuration, which allows for precise fuel metering and excellent idle quality. It also includes a vacuum secondary system, which provides additional fuel during hard acceleration to ensure maximum power output. The secondary system is adjustable, allowing users to customize the carburetor's performance to their specific application.

The R-634-A carburetor includes a number of performance-enhancing features, such as a high-performance fuel pump, adjustable idle mixture screws, and adjustable power valves. It also includes a primary metering rod and a secondary metering rod, which can be adjusted to fine-tune the carburetor's performance.

The Holley R-634-A NOS Carburetor is easy to install and comes with all necessary hardware, including mounting brackets, gaskets, and hardware. It is also compatible with a wide range of fuel systems, including electric and mechanical fuel pumps. The carburetor is backed by Holley's one-year limited warranty, ensuring peace of mind for customers.

In summary, the Holley R-634-A NOS Carburetor is a high-performance racing carburetor specifically designed for use with Autocar Engines model 447. It features a 634 CFM double pumper design, a vacuum secondary system, and a number of performance-enhancing features, making it an excellent choice for high-performance applications where maximum power output is essential. It is easy to install and backed by Holley's one-year limited warranty.

The Holley R-634-A NOS carburetor is a popular choice for automotive enthusiasts looking to add a high-performance carburetor to their C70 series engines, including the Autocar 447 engine. Here are some potential pros and cons of purchasing this carburetor:

Pros:

1. Nitro-Gas NOS (Nitrous Oxide System) compatibility: The Holley R-634-A NOS carburetor is specifically designed for use with NOS systems, making it an excellent choice for those looking to add nitrous oxide to their engine setup.

2. High-performance design: This carburetor offers excellent air/fuel mixture control, which can lead to increased horsepower and torque. It also features a large 850 CFM venturi, which allows for a larger fuel flow rate.

3. Adjustability: The Holley R-634-A NOS carburetor offers a wide range of adjustability, with options for fine-tuning the idle mixture, main jets, and power valve.

4. Durable construction: The carburetor is constructed from high-quality materials, including billet aluminum and stainless steel, which can withstand the rigors of high-performance applications.

5. Easy to install: The Holley R-634-A NOS carburetor comes with a complete kit, including all necessary hardware and instructions, making it relatively easy to install.

Cons:

1. Cost: The Holley R-634-A NOS carburetor is a high-performance carburetor, and as such, it comes with a higher price tag than some other options.

2. Complexity: The carburetor's high-performance design and NOS compatibility make it more complex than some other carburetors on the market. This may require more time and expertise to tune and set up properly.

3. Fuel consumption: The Holley R-634-A NOS carburetor's large fuel flow rate can lead to increased fuel consumption, which may not be ideal for those looking to save on fuel costs.

4. Maintenance: The carburetor's complex design may require more frequent maintenance than some other options, as it has more moving parts and components that can wear out over time.

In conclusion, the Holley R-634-A NOS carburetor offers excellent performance and compatibility with NOS systems, but it comes with a higher price tag and increased complexity compared to some other options. It may be a good choice for those looking to build a high-performance engine setup and are willing to invest the time and resources into tuning and maintaining the carburetor.

Recommendation:

If you are looking for a high-performance carburetor for your C70 series engine and are willing to invest the time and resources into tuning and maintaining it, then the Holley R-634-A NOS carburetor may be a good choice for you. However, if you are looking for a more cost-effective or less complex option, you may want to consider other carburetors on the market. Ultimately, the decision comes down to your specific needs and budget.

Details:

It came from a collection of numerous new old stock carburetors. What you see is what get. It fits Autocar 447 Engines C70 C70D C70-T C70-64. Buyer pays return shipping.

This means there could be some discoloration, markings, scratches, or other defect. We combine shipping. Any questions. Like what you see.

It replaces Autocar carburetors with part number 6AF-050. It is in good condition and all of the moving parts move properly. Please look closely at the pictures for condition before buying.

part #: r634 price

  • $324.99

specifications carbcoon:

  • for models: C70, C70d
  • brand: Holley
  • mpn: R-634-a
  • choke type: Carburetor
  • oe/oem part number: 6af-050 Autocar
  • vintage part: Yes
  • universal fitment: No
  • country/region of manufacture: United States

seller carbcoon:

  • city: Andover, Minnesota
  • # reviews: 4141
  • rating: 99.4%

shipping carbcoon:

  • carrier: USPS
  • cost: $22.67
  • type: Fixed
  • class: Standard
  • service: USPS Ground Advantage
  • transit: 3-8 Days

payments carbcoon:

  • other
  • credit card: Discover
  • wallet: Google-pay

returns carbcoon:

  • policy: Returns Accepted
  • paid by: Buyer
  • time: 30 Days

offer carbcoon:

  • availability: In Stock
  • best offers: True
  • started: April 21, 2025
  • options: Ship-to-home
  • sold: 0
  • quantity: 1

general carbcoon:

  • Car Truck Parts Accessories > Air Fuel Delivery > Carburetors
  • condition: New other see details
for models: c70, c70d, choke type: carburetor, oe/oem part number: 6af-050 autocar, vintage part: yes, universal fitment: no, country/region of manufacture: united states,
category: auto parts > car truck parts accessories > air fuel delivery > carburetors, sku: 5799490290660632,

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1 offer $324.99 USD
  • Offer #1: $324.99 price + $22.67 shipping estimate = $347.66* total. What you see is what you get. It is in good condition and all of the moving parts move properly.+$22.67 shipping

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