850CFM Race Series Carburetor

The PROFORM 850 CFM Race Series Carburetor is a purpose-built, four-barrel performance fuel delivery system engineered for high-RPM engine builds and racing applications. This aluminum carburetor delivers consistent atomization and metering across the full operating range, with a square bore design that accommodates a wide variety of intake manifold platforms. The 850 CFM airflow rating positions it in the intermediate-to-large-displacement performance segment, making it suitable for street-driven engines pushing 350–450 cubic inches or race-tuned small-block combinations requiring precise fuel control under sustained high load.

Key specifications underscore the carburetor's race-focused design. The dual inlet fuel supply accommodates both vacuum and gravity feed systems, while mechanical secondary operation ensures progressive secondary jet engagement without complication. The square bore flange delivers direct bolt compatibility with most conventional manifold castings. No choke design eliminates cold-start circuits, reducing internal complexity and weight—a standard approach in race carburetors where engine warmup is managed externally or bypassed entirely. The purple anodized finish with tumble polish provides corrosion resistance while maintaining visual appeal; anodizing protects the aluminum substrate from oxidation during extended storage or outdoor use.

This carburetor is suited for builders and racers tuning naturally aspirated engines where precise metering and responsive secondary operation are critical. The 850 CFM capacity bridges street performance and bracket racing applications. Buyers selecting a PROFORM 850 Race Series Carburetor should verify intake manifold bore diameter and fuel supply capability before purchase, as carburetor performance depends on correct fuel pressure (typically 4–6 PSI for mechanical designs) and properly sized fuel lines. Experienced engine builders often specify this class of carburetor when transitioning from smaller displacement platforms or when fuel atomization quality directly impacts horsepower delivery.