The DaVinci team produces the fastest Competition carburetor in drag and circle track. Our Competition carbs offer the most consistent and reliable performance, from the all out Pro Stock and Pro Mod to the ET and Super Series racing. DaVinci's reputation for all out performance is incomparable.  DaVinci offers carburetors which are specifically designed for throttle-stop operation, which produces a flat fuel curve throughout the run. Our circle track Competition carbs have similar features that solve the problems of "on and off" throttle racing.  Extensive modifications by the knowledgeable DaVinci crew are applied to make gains in horsepower, ranging from 5-50 horsepower over all other modifications. Sanctioning body rules are adhered to where needed.  Our carbs are quality tested on a race engine with float level and idle preset for out of the box operation. All parts are coated to a high luster to add reliability.

• Blueprinting/Machining

        All circuits modified for correct size and

            all passages cleared of casting

            obstructions

        Metering plate, main body, and baseplate

            machined and squared for flatness

        All bosses blueprinted (threads, throttle

            shaft bores, and booster pads)

        Airflow increased and balanced by blending

            and contouring venturis and profiling

            shafts

• Calibration

        Airbleeds sized to specification. Adjustable

            airbleeds installed when allowed by

            rules

        Fuel emulsion system tested and equalized.

        All emulsion circuits have been sized and de-

            burred for maximum atomization and flow

        Squirter system modified and calibrated to

            eliminate bogs, sags, and hesitations

        Custom squirter emulsion system added

        Idle tube is modified to remove restrictions
            in main well to control fuel ratio.

        Internal system is modified to aid response

            and gearshift consistency.

• Booster Alignment/Installation

        Booster centered within main venturi on

            a close tolerance jig

        Booster secured to reduce hazardous and

            power robbing vibration

• Precision Assembly

        Welded linkage, button-head butterfly

            screws

        Premium non-stick gaskets used throughout

        Blueprinted hi-flow needle and seat installed

            along with squirters

        Extra tall vent tubes installed

• Flow testing and Quality Control

        Tested on a Superflow bench for correct

            and even flow