Description

Unleash the full potential of your performance engine with the iconic Holley 4777S Double Pumper Carburetor. Renowned as a staple in the performance world, this 650 CFM 4-barrel carburetor features mechanical secondaries for instant, on-demand power and two accelerator pumps for a consistent fuel shot during hard acceleration. The manual choke mechanism provides reliable cold starting and warm-up control, making it a favourite for street/strip applications and racing. Engineered for precision and durability, the Holley 4777S is the ultimate choice for enthusiasts, hot rod builders, and drag racers in South Africa seeking aggressive throttle response and maximum horsepower from their carbureted engines.

Key Features:

• Holley Double Pumper Performance: Delivers superior acceleration and power with dual accelerator pumps.
• 650 CFM Flow Rate: Ideal for a wide range of medium-to-high performance V8 engines.
• Mechanical Secondaries: Provides immediate, wide-open throttle response for aggressive power delivery.
• Manual Choke: Offers precise control over cold starting and warm-up enrichment.
• 4-Barrel Design: Optimizes airflow and fuel atomization for enhanced combustion.
• Vacuum Ports: Features various vacuum ports for necessary accessories like PCV and power brakes.
• Durable Construction: Built with Holley’s legendary quality for long-lasting reliability.
• Enhances Engine Performance: Significantly improves throttle response, horsepower, and torque.
• Easy to Tune: Designed for straightforward tuning to dial in your engine’s specific needs.
• Nationwide Delivery Across South Africa: We ship performance fuel components nationwide from Alberton, Gauteng.
• Expert Support Available: Our team can assist with compatibility and tuning inquiries.

Specifications:

• CFM (Cubic Feet per Minute): 650
• Choke Type: Manual
• Secondary Type: Mechanical
• Number of Barrels: 4
• Fuel Inlet: Dual
• Finish: Gold Dichromate (typical for Holley classic)
• Part Number: 0-4777S
• Brand: Holley

Frequently Asked Questions:

1. What type of engine is best suited for a 650 CFM Double Pumper? A 650 CFM Double Pumper is typically well-suited for medium to high-performance Small Block and mild Big Block V8 engines, particularly those used in street/strip applications where aggressive throttle response is desired.
2. What are mechanical secondaries? Mechanical secondaries open directly with throttle linkage, providing instant fuel delivery for immediate power. This differs from vacuum secondaries, which open based on engine vacuum.
3. How do I install a manual choke? A manual choke requires a choke cable (sold separately) that connects from the carburetor to a pull knob inside the vehicle’s cabin, allowing the driver to manually control the choke butterfly valve.
4. Is tuning required after installation? Yes, installing a new carburetor almost always requires tuning (idle speed, idle mixture, accelerator pump adjustments, jetting) to optimize it for your specific engine, camshaft, and vehicle setup.
5. Do you ship Holley carburetors throughout South Africa? Yes, we offer reliable nationwide delivery of performance fuel system components across South Africa from our location in Alberton, Gauteng.
6. Can I get technical assistance for tuning this carburetor? While we don’t offer in-person tuning, our customer support team can provide general guidance and resources for tuning Holley carburetors. For advanced tuning, consulting a professional engine tuner is recommended.

Why Choose the Holley 4777S Double Pumper Carburetor in South Africa?

If you’re in South Africa and demand aggressive, instant power and precise control for your performance V8 engine, the Holley 4777S 650 CFM Double Pumper with manual choke is a legendary carburetor known for its street/strip prowess and reliability, making it an excellent choice for serious enthusiasts.