SP Dominator 1150CFM Carburetor 3-Circuit

The SP Dominator 1150CFM Carburetor 3-Circuit is purpose-built for serious street and strip enthusiasts seeking reliable fuel delivery and precise air-fuel mixture control. This carburetor addresses the core challenge every high-performance engine builder faces: matching fuel atomization and metering to varying load conditions without sacrificing responsiveness or economy. Whether you're tuning a naturally aspirated V8, bracket racing, or dialing in a restomod, the three-circuit design adapts to idle, cruise, and wide-open-throttle demands with mechanical precision that solid-state electronics cannot replicate.

The 1150 cubic feet per minute (CFM) flow rating positions this carburetor for engines ranging from 375 to 475 horsepower, making it versatile across small-block and mid-sized big-block platforms. The three-circuit configuration separates idle, off-idle transition, and main jets into independent fuel paths, allowing you to tune each stage without interference. This modular approach delivers consistent air-fuel ratios across the RPM spectrum and simplifies troubleshooting—a critical advantage when chasing hundredths on the dyno or track. The mechanical design ensures repeatability; there's no fuel pressure sensitivity or computer compensation masking calibration errors, giving you direct feedback on your tuning choices.

This carburetor is ideal for street rods, vintage race cars, and vintage muscle car restorations where originality or mechanical simplicity is preferred over modern fuel injection. Installation requires a standard four-barrel intake manifold flange and compatible fuel supply line; ensure your fuel pump delivers 4.5–7 PSI at full load to avoid float bowl flooding or starvation. The 12.4-pound weight and compact 12.6 x 9.6 x 14.4-inch footprint fit most traditional engine bays with minimal clearance modification, making it a drop-in solution for builders prioritizing proven, adjustable carburetor technology over complexity.