780CFM Carburetor - Street- E/C

The Quick Fuel Technology 780 CFM Street Carburetor (SS-780-VS) is a modern 4-barrel, square-bore fuel delivery system engineered for street-driven vehicles requiring reliable, tuned fuel atomization across the RPM band. This aluminum carburetor features an electric choke for cold-start consistency, vacuum secondary actuation for responsive power delivery, and a dual-inlet fuel system that simplifies plumbing and improves pressure regulation. The red anodized and tumble-polished finish provides both corrosion resistance and a finished appearance suitable for engine bay display.

At 780 CFM, this carburetor sits in the sweet spot for mid-sized displacement street engines—large enough to support spirited acceleration and part-throttle responsiveness without the flat-spot behavior associated with oversized units on smaller platforms. The vacuum secondary design responds to engine load rather than throttle position alone, meaning fuel delivery scales with actual demand, improving part-throttle economy and drivability on the street where engines operate well below peak power output most of the time. The square-bore configuration ensures compatibility with standard bolt-pattern intake manifolds and allows use of existing fuel line adapters.

This unit suits builders and enthusiasts upgrading from factory carburetor systems or transitioning from worn performance carburetors to a modern, EPA-era design. It is well-matched to stock or mildly ported street heads, hydraulic-cam combinations, and naturally aspirated engines in the 350–450 cubic-inch range. The electric choke eliminates the complexity of manifold heat tubes and provides repeatable cold-start behavior across seasons. Dual inlets accommodate both single and dual-feed fuel systems, offering flexibility during installation and allowing use of in-tank or external fuel pumps.

Quick Fuel Technology carburetors are known for conservative jetting and calibration that assumes stock idle timing and stock cam overlap; tuning typically requires jet changes and air-bleeder adjustment during initial dyno work or road testing. Weight is approximately 9.7 lbs, typical for aluminum float-bowl designs. This carburetor is sold as a complete unit ready for immediate bolting to a compatible manifold with appropriate fuel supply and electrical choke circuit in place.