10-11-2023, 04:40 PM
I believe that is a 'double carburettor' where there is one float chamber feeding effectively two carburetters each a with choke and a complete set of jets etc in one body.
In that set up one side feeds cylinders 1 & 2, the other 3 & 4. The air flow through each is not very constant. Cylinder 4 follows 3 immediately and then there's a gap while the other side feeds 2 then 1.
The Lotus system I believe was set up so that one choke fed 1 & 4 and the other 2 & 3 thus giving a more evn flow, With the inlet ports desiamesed the problem of charge robbing was avoided where one cylinder would take some of the mixture meant for the other cylinder which shared the inlet port.
The Straight-8 Daimlers used a similar sysem with a double Stromberg carburetor feeding cylinders 1,2,7&8 from one choke and 3,4,5&6 from the other. The Ford V-8 also used the Stromberg carburettor with each choke feeding one side of the engine.
In that set up one side feeds cylinders 1 & 2, the other 3 & 4. The air flow through each is not very constant. Cylinder 4 follows 3 immediately and then there's a gap while the other side feeds 2 then 1.
The Lotus system I believe was set up so that one choke fed 1 & 4 and the other 2 & 3 thus giving a more evn flow, With the inlet ports desiamesed the problem of charge robbing was avoided where one cylinder would take some of the mixture meant for the other cylinder which shared the inlet port.
The Straight-8 Daimlers used a similar sysem with a double Stromberg carburetor feeding cylinders 1,2,7&8 from one choke and 3,4,5&6 from the other. The Ford V-8 also used the Stromberg carburettor with each choke feeding one side of the engine.
Jim