MGB GT V8 Fuel

The MGB GT V8 was fitted with two SU HIF6 carburettors with spring loaded needles of type BBU. They had horizontal integrated float chambers with a choke diameter of 1 ¾”. The jet size was .100”. To avoid the MGC bonnet bulge, the carburettor had to be fitted at the back of the engine. To accommodate this position, a special V shaped adapter with two throats was bolted on top of the inlet manifold to reach the back of the carburettors. A high-pressure SU electric fuel pump of part number AUF305 was originally fitted. In 1977 this was uprated to AZX1307. It had a longer contact life, was less prone to buzzing and was fully interchangeable with AUF305.