SU AUD405R Rear Mgb Carburetor Rebuilding

( Brand: Su ), ( Manufacturer Part Number: AUD405R ), ( Type: Carburetor )

Review SU Mgb Rear Carburetor For Rebuilding fits HS4 1970–1971

The SU Carburetor Model AU405R is a high-performance carburetor specifically designed for use in 1970 and 1971 MGB rear engines. This carburetor is ideal for those looking to rebuild their existing carburetor or upgrade to a higher-performing option.

The AU405R is a 2-barrel carburetor, with each barrel providing 40mm of venturi diameter. It is designed to replace the original SU HS4 carburetors found on these MGB models. This carburetor utilizes twin choke mechanisms, enhancing its ability to provide a consistent and reliable fuel-air mixture under various operating conditions.

The body of the AU405R is manufactured from high-quality aluminum alloy, ensuring both durability and lightweight construction. The carburetor features a finned design on its top surface, which not only adds a classic aesthetic appeal but also aids in dissipating heat generated during operation.

The carburetor comes with a set of new, high-performance jets and needles, allowing for fine-tuning of the fuel-air mixture. The main jet size is 110, while the secondary jet size is 52. Additionally, the carburetor includes a new float bowl gasket and needle jet gasket to ensure a proper seal during operation.

The AU405R utilizes a manual choke system, providing the driver with greater control over the engine starting process. The manual choke lever is conveniently located on the carburetor body, allowing for easy access and operation.

The carburetor comes complete with all necessary hardware for installation, including new mounting bolts and gaskets. The kit also includes a set of new throttle shafts, ensuring a proper fit and smooth operation.

In summary, the SU Carburetor Model AU405R is a high-quality, high-performance carburetor designed specifically for the 1970 and 1971 MGB rear engines. With its twin 40mm venturi barrels, twin choke mechanisms, and durable aluminum alloy construction, this carburetor is an excellent choice for those looking to rebuild or upgrade their MGB's fuel delivery system.

Buying a SU HS4 carburetor for rebuilding a 1970-1971 MGB can be a worthwhile investment for those seeking to restore the performance of their classic roadster. Here are some pros and cons to consider before making a purchase:

1. Authenticity: A rebuilt original SU HS4 carburetor can maintain the authenticity of your MGB, adding to its value and appeal.

2. Improved Performance: Rebuilding the carburetor can lead to improved engine performance, including better fuel efficiency and increased power output.

3. Availability: SU carburetors are widely available from various suppliers, making it easier to find a rebuild kit or a pre-rebuilt unit.

4. Cost-Effective: Rebuilding an existing carburetor is generally more cost-effective than purchasing a new one.

5. Adjustability: The SU HS4 carburetor offers adjustability, allowing you to fine-tune the engine for different driving conditions and preferences.

1. Complexity: Rebuilding a carburetor can be a complex and time-consuming process, requiring specialized tools and knowledge.

2. Cost: While rebuilding is more cost-effective than purchasing a new carburetor, it still requires an investment in parts, tools, and possibly professional assistance.

3. Potential Issues: A rebuilt carburetor may not perform as well as a new one or may develop issues due to the age and condition of the original components.

4. Ongoing Maintenance: Classic cars like the MGB require regular maintenance, including occasional carburetor adjustments and rebuilds.

Considering the pros and cons, buying a rebuilt SU HS4 carburetor for a 1970-1971 MGB can be a good investment for those seeking to restore the authenticity and performance of their classic roadster. However, be prepared for the complexity and potential costs involved in the rebuilding process. If you lack the necessary skills or resources, consider purchasing a pre-rebuilt unit or seeking professional assistance. Ultimately, the decision depends on your personal preferences, budget, and level of expertise.

If you are confident in your rebuilding skills and have the necessary tools, purchasing a rebuild kit for the SU HS4 carburetor and rebuilding it yourself can be a cost-effective and rewarding option. Alternatively, consider purchasing a pre-rebuilt unit from a reputable supplier to ensure optimal performance and reduce the time and effort required for the rebuild process. Regardless of your choice, be sure to follow the manufacturer's instructions carefully and consider investing in ongoing maintenance to ensure the longevity of your new carburetor.

Details:

We engage in restoration services, rebuilding work, repair sand Supply parts for a great many cars built England Such as Austin Haley,Bentley, Jaguar, MG, Rolls-Royce, Triumph and more. This 1970-1971 MGB rear SU HS4 carburetor AUD405R is sold for rebuilding purposes. While it is a AUD405R rear carb, has AUD405F tag for front carb which means when was rebuilt long ago and someone mixed up the tags better than tossing them. Some of the parts arbours and others have been donated by our automotive clients that are aware odour animal rescue efforts.

part #: aud405r price

• $99.97

specifications carbcoon:

• for models: Hs4
• for years: 1970-1971
• brand: Su
• mpn: Aud405r
• type: Carburetor

general carbcoon:

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

shipping carbcoon:

• class: Expedited, Economy
• transit: 9-15 Days
• cost: $28.85
• carrier: USPS, FedEx
• type: Calculated
• service: USPS Priority Mail, FedEx Ground Economy

offer carbcoon:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: April 16, 2025

returns carbcoon:

• policy: No Returns

seller carbcoon:

• rating: 100.0%
• city: Houston, Texas
• # reviews: 2284

payments carbcoon:

• wallet: Apple-pay
• other
• credit card: Mastercard

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