1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your Holley 0-80350 Performance 350CFM Street Avenger Carburetor. The Holley Street Avenger series carburetors are designed for optimal street performance, featuring an optimized calibration and a factory-preset electric choke for reliable starting.
Please read this manual thoroughly before attempting any installation or adjustments to ensure safe and correct usage of the product.
2. Setup and Installation
Proper installation is crucial for the performance and longevity of your carburetor. Follow these steps carefully:
2.1 Pre-Installation Inspection
- Inspect the carburetor for any shipping damage.
- Ensure all linkages move freely and are not bent or obstructed.
- Verify that all necessary gaskets and hardware are present.
2.2 Mounting the Carburetor
- Place a new carburetor base gasket onto the intake manifold. Ensure it aligns correctly with the manifold ports.
- Carefully position the Holley 0-80350 carburetor onto the gasket and manifold studs.
- Install the carburetor hold-down nuts and washers. Tighten them evenly in a crisscross pattern to the manufacturer's recommended torque specifications. Overtightening can warp the carburetor base.
Figure 1: Holley 0-80350 Street Avenger Carburetor, front-right view. This image displays the Holley 0-80350 Street Avenger Carburetor from a front-right perspective, showcasing its polished finish and general assembly.
2.3 Fuel Line Connection
- Connect the fuel line to the carburetor's fuel inlet. Use appropriate fittings and ensure a leak-free seal.
- It is recommended to use a high-quality fuel filter upstream of the carburetor to prevent contaminants from entering.
2.4 Throttle and Choke Linkage
- Connect the throttle cable or rod to the carburetor's throttle lever. Ensure smooth, full-range operation without binding.
- For the electric choke, connect the choke wire to a switched 12-volt ignition source. This source should only be active when the ignition is on.
Figure 2: Side view of Holley 0-80350 Carburetor with throttle linkage. A side view of the carburetor, highlighting the throttle linkage mechanism and its connection points.
Figure 3: Holley 0-80350 Carburetor showing electric choke assembly. A detailed view of the electric choke assembly on the carburetor, including its wiring connection point.
2.5 Vacuum Lines
- Connect all necessary vacuum lines (e.g., PCV, power brake booster, vacuum advance) to the appropriate ports on the carburetor and intake manifold. Refer to your vehicle's service manual for specific routing.
3. Operating Instructions
Understanding the basic operation of your Holley carburetor will help ensure optimal performance.
3.1 Engine Starting
- Cold Start: With the engine off, depress the accelerator pedal once to set the electric choke. Turn the ignition key to start the engine. The choke will gradually open as the engine warms up.
- Warm Start: If the engine is warm, the choke should already be open. Start the engine without depressing the accelerator pedal. If it hesitates, a slight pedal press may be needed.
3.2 Idle Adjustment
- Once the engine is at operating temperature and the choke is fully open, adjust the idle speed screw to achieve the desired engine RPM.
- The idle mixture screws are factory preset for optimal street performance. Minor adjustments may be made in small increments (1/8 turn at a time) to achieve the smoothest idle, turning them clockwise to lean the mixture and counter-clockwise to richen it. Always adjust both screws equally.
Figure 4: Top view of Holley 0-80350 Carburetor, showing primary and secondary barrels. This overhead view illustrates the primary and secondary fuel/air barrels of the carburetor, along with the air horn.
3.3 Accelerator Pump
The accelerator pump provides an immediate burst of fuel when the throttle is opened quickly, preventing hesitation. The Street Avenger series is calibrated for street use, and typically no adjustment is needed for the accelerator pump unless specific tuning requirements arise.
4. Maintenance
Regular maintenance ensures the longevity and consistent performance of your Holley carburetor.
4.1 Routine Checks
- Periodically inspect all fuel lines and connections for leaks.
- Check throttle and choke linkages for smooth operation and ensure they are free of debris.
- Ensure all vacuum lines are securely connected and free from cracks or damage.
4.2 Cleaning
- Keep the exterior of the carburetor clean. Use a carburetor cleaner specifically designed for external use, avoiding spraying directly into the air horn or vacuum ports.
- Regularly inspect and clean or replace the air filter to prevent dirt and debris from entering the carburetor.
4.3 Fuel Filter
Replace the inline fuel filter at recommended intervals to protect the carburetor from contaminants. A clogged fuel filter can lead to fuel starvation and poor engine performance.
5. Troubleshooting
This section addresses common issues you might encounter with your carburetor.
| Symptom | Possible Cause | Solution |
|---|---|---|
| Hard Starting (Cold) | Electric choke not engaging or miswired. | Check choke wiring and ensure it receives 12V when ignition is on. Verify choke plate closes when cold. |
| Rough Idle | Vacuum leak, incorrect idle mixture, or float level issue. | Check all vacuum lines. Adjust idle mixture screws slightly. Verify float level. |
| Engine Hesitation on Acceleration | Accelerator pump not functioning correctly or fuel starvation. | Inspect accelerator pump linkage. Check fuel filter and fuel pressure. |
| Poor Fuel Economy | Rich idle mixture, high float level, or vacuum leak. | Adjust idle mixture. Check float level. Inspect for vacuum leaks. |
| Fuel Leaks | Loose fittings, damaged gaskets, or high float level. | Tighten fittings, replace gaskets, adjust float level. |
If you encounter issues not listed here or are unable to resolve a problem, please contact Holley technical support or a qualified automotive technician.
6. Specifications
Key specifications for the Holley 0-80350 Performance 350CFM Street Avenger Carburetor:
- Brand: Holley
- Model: 0-80350
- OEM Part Number: 0-80350
- Fuel Type: Electric (for choke)
- Specific Uses For Product: Performance
- Product Dimensions: 11"D x 12.25"W x 7.5"H
- Item Weight: 6.55 pounds
- Exterior Finish: Shiny
- UPC: 090127719152
7. Warranty Information
Holley products are manufactured to high standards. For detailed warranty information regarding your 0-80350 Performance 350CFM Street Avenger Carburetor, please refer to the documentation included with your purchase or visit the official Holley website. Warranty terms and conditions typically cover manufacturing defects for a specified period from the date of purchase.
8. Customer Support
Should you require technical assistance, have questions about installation, or need to troubleshoot an issue, please contact Holley customer support directly. You can typically find contact information, including phone numbers and email addresses, on the official Holley website (www.holley.com) or within the product packaging.
When contacting support, please have your product model number (0-80350) and any relevant purchase information readily available.
