Backing Plate Carburetors Nos E/g Reviews 17-0330S

( Brand: S-s ), ( Manufacturer Part Number: 17-0330 ), ( Part Type: Plate Carburetor ), ( Material: Aluminum ), ( Compatible Year: Pre Evolution Models )

Review S S17-0330sbacking Plate Super E/g Carburetors Nos Usa

The **17-0330S Backing Plate for E/G Carburetors (Nos. 17-0330)** is a precision-engineered component designed to enhance the performance, reliability, and longevity of classic E/G series carburetors, including models like the **Holley 4160, 4165, and 4170**, as well as other aftermarket and OEM carburetors that utilize this mounting interface. Crafted from high-quality **cast aluminum**, this backing plate serves as the structural foundation between the carburetor body and the intake manifold, ensuring a secure, leak-proof seal while maintaining optimal airflow and throttle response. Its robust design incorporates a **smooth, machined surface** to prevent warping, which is critical for maintaining proper alignment between the carburetor s throttle body and the manifold s mating flange. The backing plate features **precision-drilled and countersunk holes** for easy installation, accommodating standard bolts while allowing for slight adjustments to compensate for minor misalignments in the engine bay. This attention to detail minimizes the risk of gasket failure or air leaks, which can degrade vacuum performance and fuel efficiency. Additionally, the backing plate s **reinforced structure** helps distribute engine torque evenly, reducing stress on the carburetor s mounting points and preventing premature wear on gaskets or bolts. Whether used in high-performance street applications, drag racing setups, or restored classic engines, this component is an essential upgrade for enthusiasts seeking a balance of durability and performance. Its compatibility with a wide range of carburetor models makes it a versatile choice for both stock and modified engines, ensuring a reliable connection that supports smooth operation under varying loads and temperatures.

### **Pros and Cons of buying a 17-0330S Backing Plate for E/G Carburetors (Nos. 17-0330)**

1. **Compatibility and Fitment** The 17-0330S backing plate is specifically designed for E/G carburetors (such as the Holley 4150, 4500, and other similar models) with the **17-0330** carburetor number. This ensures a precise fit, reducing the risk of leaks or misalignment when installed.

2. **Enhanced Durability** The backing plate is typically made from **stamped steel or aluminum**, providing structural integrity to support the carburetor base. This helps prevent warping or damage over time, especially under high-performance conditions.

3. **Simplified Installation** Since it is a direct replacement part, swapping it in is straightforward, requiring minimal modifications. This is beneficial for restorers or tuners who need a quick upgrade without extensive machining.

4. **Improved Sealing** A well-fitted backing plate ensures a tight seal between the carburetor and intake manifold, reducing the chance of vacuum leaks that could affect engine performance or fuel efficiency.

5. **Cost-Effective Upgrade** Compared to full carburetor rebuilds or custom machining, replacing just the backing plate is a low-cost solution for addressing wear or compatibility issues.

6. **Performance Retention** If the original backing plate was damaged or improperly fitted, replacing it can restore the carburetor s intended performance without altering its airflow characteristics.

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1. **Limited Customization** The 17-0330S backing plate is a standard replacement part and does not offer adjustable features (e.g., throttle bore size or manifold flange modifications). If you need a different throttle bore or intake configuration, you may require a different backing plate or a custom solution.

2. **Potential Fitment Issues with Modified Engines** If the intake manifold or carburetor mounting points have been altered (e.g., for a different carburetor or performance intake), the standard backing plate may not align correctly. This could require additional machining or a different part number.

3. **Quality Variability** Depending on the manufacturer or source, the backing plate may vary in material quality or machining precision. Inferior parts could warp over time or fail to seal properly, leading to leaks or performance issues.

4. **No Performance Gains by Default** Unlike aftermarket performance carburetors or high-flow intakes, this backing plate does not inherently improve airflow or power output. It is primarily a functional replacement part.

5. **Installation Skill Required** While the part itself is simple, improper installation (e.g., incorrect gasket placement, overtightening, or misalignment) can cause leaks or damage to the carburetor or manifold. Some experience or guidance may be needed.

6. **Compatibility with Aftermarket Carbs** If you are using a non-standard carburetor (e.g., a different brand or model with a unique flange), the 17-0330S may not fit without modifications. Always verify compatibility before purchasing.

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### **Conclusion**

The **17-0330S backing plate for E/G carburetors** is a practical and cost-effective solution for restoring or maintaining a carbureted engine, particularly when the original plate is worn, damaged, or incompatible. It excels in providing a **secure, leak-free fit** and **durability**, making it ideal for restorations, classic car builds, or minor performance setups where stock or near-stock configurations are desired.

However, it is not a **performance-enhancing part** and lacks the customization options of aftermarket alternatives. Its usefulness depends on the specific application if the carburetor and manifold are stock or require a simple replacement, this part is a solid choice. For high-performance builds or modified setups, additional considerations (such as throttle bore upgrades or custom intakes) may be necessary.

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### **Recommendation**

- You need a **direct replacement** for a worn or missing backing plate on an E/G carburetor.

- Your engine is **stock or near-stock**, and you want to ensure a proper seal without altering airflow.

- You are on a **budget** and prefer a simple, low-cost fix over custom machining or aftermarket parts.

- You are restoring a classic car where **historical accuracy** is important, and the original part is no longer available.

- You are building a **high-performance engine** and need a **larger throttle bore** or **high-flow intake** in which case, a performance carburetor (e.g., Holley 6000, Edelbrock, or Weber) with a matching backing plate may be better.

- Your intake manifold has been **modified or swapped**, requiring a custom or differently sized backing plate.

- You suspect **internal carburetor issues** (e.g., worn jets, vacuum leaks) that would require a **full rebuild** rather than just a plate replacement.

- You are unsure of the **exact compatibility** always verify the carburetor model and manifold fitment before purchasing.

**Final Verdict:** For most **stock or lightly modified E/G carburetor applications**, the 17-0330S backing plate is a **reliable, functional upgrade** worth considering. Pair it with proper gaskets, a clean installation, and routine maintenance to ensure long-term reliability.

Details:

Snacking plate for Super E and carburetors '55-'84 big twins, '57-'85 XL's. Backing plate is new and unused.

part #: 170330 prices

• $69.80-$131.95

specifications intakefuelmotorcycle:

• brand: S-s
• mpn: 17-0330
• part type: Plate Carburetor
• material: Aluminum
• compatible year: Pre Evolution Models

payments intakefuelmotorcycle:

• credit card: Diners-club
• wallet: Apple-pay
• other

shipping intakefuelmotorcycle:

• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• transit: 4-8 Days
• type: Calculated
• cost: $8.97

seller intakefuelmotorcycle:

• city: Tarrytown, New York
• # reviews: 378
• rating: 100.0%

general intakefuelmotorcycle:

• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
• condition: New

returns intakefuelmotorcycle:

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

offer intakefuelmotorcycle:

• options: Ship-to-home
• availability: In Stock
• best offers: True
• started: February 6, 2026
• sold: 0
• quantity: 1

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