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Another common problem in conventional carburettors is reducing aeration of the fuel prior to main jet entrance. When the main jet draws in an air bubble instead of fuel, the mixture is altered for a short period of time. The Smart Carby has a unique bowl design that eliminates bowl frothing entering the jets. The bowl also flows much more fuel than a conventional Holley bowl and the fuel flow rate is independent of the needle and seat window alignment. Fuel pressure handling limits are increased and fuel cannot splash into the vent. The fuel system is easily cleanable right up to the window. Float assembly is done without tools and is very quick. The bowl screws are dry assembly, not requiring sealing washers and any bolt contamination can't find its way into the fuel. The Smart Carby Quick Change Carburetor enables full control of the carburettor functions with a very simple and quick tuning time.

There is no need to drain fuel to tune the carburetor or remove metering blocks and drill holes or plug holes or alter emulsion well patterns or understand mysterious air bleed influence. All the metering systems are in the removable plates.

You can test a tune or change from methanol to petrol, which normally requires a teardown of other carburetors by simply undoing one bolt and changing a top assembly and re-tightening the bolt.

The carburettor is suitable for any liquid fuel and is easily converted. There is no need to work over the top of the engine. All the tuning functions of the carburettor are contained in the quickly removable plates.

All the internal parts are readily available Holley components except the main jetting device which is a patent pending Smart Carby design.

There are five main sections of the carburettor.

1 Throttle plate (patents pending) containing throttle shafts, butterfly valves and replaceable transfer slot inserts. The transfer slot inserts are removed by hand and can be selected for different applications and tunes.
2 Main body, which locates into the throttle plate and has the idle mixture adjusting screws mounted on the side and the float bowls mounted on the ends. The main body has a recess for the installation of the plates forming the fuel delivery control systems.
3 The first plate installed into the main body is the jet plate. This plate has the fuel control jets. The transfer jets are screwdriver installed. The main jets are dropped in by hand and held in place by the sandwiching of the finished assembly.
4 The second plate installed into the main body is the aero plate. This plate has the air control jets. The accelerator pump check valve and jet are also located in the aero plate
5 The float bowls control the fuel level and prevent uncontrolled air bubbles from entering the jetting systems.